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1.
J Cancer Policy ; 37: 100430, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37392842

RESUMO

BACKGROUND: Cancer incidence and mortality are rapidly rising in Africa. National Cancer Control Plans (NCCPs have contributed to a reduction in the burden of some preventable cancers, availing early diagnosis and adequate treatment modalities and palliative care, while sustaining them with sufficient monitoring systems. knowledge we undertook a cross-sectional survey across continental Africa to understand the presence of NCCPs, availability of early detection and screening policies and the status of health financing pertaining to cancer. METHODS: Through an online survey, we approached key cancer care staff in 54 countries. Questions were themed in 3 main areas - Cancer registries and national cancer control plans (NCCPs) availability in countries, Cancer screening, diagnosis and management capacity, Financing in cancer care. RESULTS: On 54 approached respondents, we received 32 responses. 88 % of responding countries have active national cancer registries, 75 % with NCCPs and 47 % with cancer screening policies and practices. Universal Health Coverage is available in 40 % of countries. CONCLUSION: Our study shows that there is a scarcity of NCCPs in Africa. Deliberate investment in cancer registry and clinical services is key to improving access to care and ultimately reduce cancer mortality in Africa.


Assuntos
Atenção à Saúde , Neoplasias , Humanos , Estudos Transversais , África/epidemiologia , Neoplasias/diagnóstico , Política de Saúde
2.
Cancer Radiother ; 25(3): 229-236, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33423965

RESUMO

PURPOSE: This study aimed to assess radiation dose distribution to cardiac subvolumes in left-sided breast cancer radiotherapy (LBCRT) and to clarify whether the mean heart dose (MHD) reliably reflects cardiac substructures exposure. MATERIALS AND METHODS: Fifty women referred for adjuvant LBCRT were prospectively evaluated. All patients received 3D-conformal hypofractionated radiotherapy (40Gy delivered in 15 fractions of 2.67Gy±boost of 13.35Gy). Cardiac substructures were contoured using the F. Duane's cardiac atlas. Dose distribution to cardiac chambers, left main (LM), left anterior descending (LAD), left circumflex (LCx) and right coronary artery (RCA)) was assessed. Dosimetric associations were analysed. RESULTS: The mean MHD was 3.08Gy (EQD2=3.67Gy). The mean Dmean/Dmax LAD was 11.45Gy (EQD2=13.64Gy)/29.5Gy (EQD2=35.15Gy). Low doses were delivered to LM, LCx, and RCA (Dmean≤1.3Gy). The left ventricle (LV) was the most exposed cardiac chamber with Dmean/Dmax of 4.78Gy/37Gy. The strongest correlation with MHD was found for Dmean LAD (r=0.81). For every 1Gy increase in MHD, Dmean LAD rose by 3.4Gy. However, the proportion of variance in Dmean LAD predictable from MHD was moderate (R2=0.65). For all other cardiac substructures, R2 values were<0.7. CONCLUSION: Our study showed high exposure of LAD and LV in LBCRT. With poor predictive value, MHD may underestimate doses to cardiac substructures. For optimal heart sparing radiotherapy, we recommend to consider LV and LAD as separate organ at risk.


Assuntos
Cardiotoxicidade/etiologia , Coração/efeitos da radiação , Radioterapia Conformacional/efeitos adversos , Neoplasias Unilaterais da Mama/radioterapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma Ductal de Mama/tratamento farmacológico , Carcinoma Ductal de Mama/radioterapia , Carcinoma Lobular/tratamento farmacológico , Carcinoma Lobular/radioterapia , Vasos Coronários/efeitos da radiação , Feminino , Átrios do Coração/efeitos da radiação , Ventrículos do Coração/efeitos da radiação , Humanos , Irradiação Linfática , Pessoa de Meia-Idade , Órgãos em Risco/efeitos da radiação , Estudos Prospectivos , Doses de Radiação , Hipofracionamento da Dose de Radiação , Reirradiação , Neoplasias Unilaterais da Mama/tratamento farmacológico
3.
Clin Oncol (R Coll Radiol) ; 26(6): 333-43, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24746747

RESUMO

AIMS: To investigate patterns of practice in palliative radiotherapy in Africa. MATERIALS AND METHODS: Fifteen centres in Africa provided detailed information about radiotherapy in both metastatic and locally advanced disease via a questionnaire. Information included general information (institution status, equipment, staff, patient number), radiotherapy and other treatment characteristics in bone metastasis, brain metastasis, metastatic spinal cord compression, lung and liver metastasis, as well as locally advanced tumours. RESULTS: The number of patients annually seen/treated ranged from 285 to 5000. Breast, cervix, head and neck, gastrointestinal and prostate cancer were the top five cancers overall. Eight (53%) institutions were without linear accelerators, four (27%) had a single one, whereas one institution each had two, three and four linear accelerators. The number of cobalt machines ranged from 0 to 2 (median 1). Most centres still prefer to use fractionated radiotherapy regimens over single-fraction regimens in bone metastasis, although most centres are now using single-fraction radiotherapy in retreatments. Radiotherapy in brain metastasis and metastatic spinal cord compression mostly conform to worldwide standards. Lung and liver metastases are rarely irradiated, largely as a consequence of the lack of modern radiotherapy technology. Locally advanced disease in various tumour sites was mostly palliated, in agreement with current evidence-based practices. CONCLUSIONS: African countries still lack adequate staffing and equipment to adequately address their clinical burden, being palliative in most cases. Emphasis should also be made on more rationally using existing capacities by using more of the single-fraction radiotherapy regimens, especially in bone metastasis.


Assuntos
Metástase Neoplásica/radioterapia , Neoplasias/radioterapia , Cuidados Paliativos/estatística & dados numéricos , África , Países em Desenvolvimento , Fracionamento da Dose de Radiação , Feminino , Humanos , Masculino , Cuidados Paliativos/métodos , Inquéritos e Questionários
4.
Cancer Radiother ; 17(7): 668-70, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24176664

RESUMO

Multiple myeloma, also known as Kahler's disease, is a cancer of plasma cells that abnormally accumulate in bone marrow. Radiation therapy may be indicated in multiple myeloma to relieve pain, alleviate spinal cord compression or reduce tumor mass. We report the case of a patient presenting a multiple myeloma, treated with radiation therapy for a spinal cord compression, who developed, eleven months later, an in-field subcutaneous relapse. We called this phenomenon myeloma appearance after local external beam radiotherapy jet (MAALEJ). A review of literature was performed trying to explain this uncommon relapse feature.


Assuntos
Mieloma Múltiplo/radioterapia , Neoplasias Cutâneas/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Mieloma Múltiplo/complicações , Recidiva Local de Neoplasia/patologia , Recidiva Local de Neoplasia/radioterapia , Neoplasias Cutâneas/radioterapia , Compressão da Medula Espinal/etiologia , Compressão da Medula Espinal/terapia
5.
Cancer Radiother ; 16(7): 627-32, 2012 Oct.
Artigo em Francês | MEDLINE | ID: mdl-23084987

RESUMO

PURPOSE: To assess the epidemiological, clinical and therapeutic aspects of pediatric Hodgkin disease (HD) and to study prognosis factors. PATIENTS AND METHODS: We retrospectively reviewed the medical records of children (≤18 years) with HD treated between 1st January 1994 and 31st December 2004. Chemotherapy was undertaken in different departments of hematology and oncology in the North of the country and radiotherapy was centralized at the Salah-Azaïz National Cancer Institute. RESULTS: One hundred fourteen consecutively treated patients were collected. Median age was 12 years (4-18 years) and sex-ratio was 2.25. Peripheral lymphadenopathy was the predominant circumstance of HD detection (82.5%). The predominant histologic type was nodular sclerosing (56%). Treatment included chemotherapy and involved-field radiotherapy. With a mean follow-up of 23.5 months, relapse rate was 12.2%. Five-year overall survival (OS) and event-free survival (EFS) rates were 95% and 76%, respectively. Five-year OS was 98.2% and 90.8% for early and advanced stages respectively. In multivariate analysis, stage IV (P=0.029) and early response to initial treatment (P=0.003) retained statistical significance for EFS whereas the only prognostic factor for OS was stage IV (P=0.002). The long-term side effects were rare. No secondary tumor was noted. CONCLUSION: Combined-modality therapy using chemotherapy and involved-field radiotherapy was effective and well-tolerated in early stage pediatric HD. Stage IV patients should be referred to specialized units for intensive treatment. The short median follow-up in our study cannot allow considering long-term effects.


Assuntos
Doença de Hodgkin/epidemiologia , Adolescente , Anemia Aplástica/etiologia , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Bleomicina/administração & dosagem , Bleomicina/efeitos adversos , Cardiomiopatia Dilatada/induzido quimicamente , Quimiorradioterapia , Criança , Pré-Escolar , Cisplatino/administração & dosagem , Cisplatino/efeitos adversos , Ciclofosfamida/administração & dosagem , Ciclofosfamida/efeitos adversos , Doxorrubicina/administração & dosagem , Doxorrubicina/efeitos adversos , Etoposídeo/administração & dosagem , Etoposídeo/efeitos adversos , Feminino , Doença de Hodgkin/terapia , Humanos , Ifosfamida/administração & dosagem , Ifosfamida/efeitos adversos , Masculino , Mecloretamina/administração & dosagem , Mecloretamina/efeitos adversos , Fótons/uso terapêutico , Prednisona/administração & dosagem , Prednisona/efeitos adversos , Procarbazina/administração & dosagem , Procarbazina/efeitos adversos , Dosagem Radioterapêutica , Indução de Remissão , Estudos Retrospectivos , Fatores de Risco , Resultado do Tratamento , Tunísia/epidemiologia , Vincristina/administração & dosagem , Vincristina/efeitos adversos
6.
Eur J Gynaecol Oncol ; 33(2): 187-92, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22611961

RESUMO

PURPOSE OF INVESTIGATION: The recognition of high-risk human papillomavirus (HR-HPV) as an etiological agent of cervical cancer has increased the importance of testing for HPV, and this might contribute to better risk stratification. METHODS: Eighty-eight randomly selected cervical cancer specimens including biopsies and their respective smears were used in this study. Control scrapings were obtained from ten healthy women. The presence of HPV16 and HPV18 was investigated using the technique of polymerase chain reaction (PCR) with the specific primers for the L1 region, while mRNA expression of HPV16 E6-E7 was evaluated by a reverse transcription PCR method (RT-PCR). RESULTS: The positivity for the viral genotype was influenced by the quantity of amplified DNA used. In tumor biopsies the higher positivity for HPV16 (54.5%) and HPV18 (15.9%) was obtained using 687.4 ng of DNA. At smears level solely 31.8% of HPV16 was detected using an average DNA quantity of about 157.2 ng. The revelation of HPV types depends on clinicopathologic data; HPV16 was detected more in advanced stages of squamous carcinoma (SC) samples (20% stage I, 62% Stage II and 80% stage III), while HPV18 and double infection were found exclusively at advanced stages of SC and in adenocarcinoma (AC), respectively (60%, 40% stage III SC and 80%, 20% Stage II A and C). The prevalence of HPV16 E6-E7 transcripts was evaluated at tumor biopsy with frequencies of 50%. CONCLUSION: Our data provide prospective evidence that HPV16/18L1 revelation at biopsy toward pathological types is efficient and correlates well with oncogenic transcript findings. Subtle changes in viral oncogene dynamics highlight the presence of other regulating proteins serving as additional biomarkers.


Assuntos
Adenocarcinoma/virologia , Carcinoma de Células Escamosas/virologia , DNA Viral/isolamento & purificação , Papillomavirus Humano 16/isolamento & purificação , Papillomavirus Humano 18/isolamento & purificação , Infecções por Papillomavirus/diagnóstico , Neoplasias do Colo do Útero/virologia , Adenocarcinoma/metabolismo , Adenocarcinoma/patologia , Adulto , Idoso , Carcinoma de Células Escamosas/metabolismo , Carcinoma de Células Escamosas/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Proteínas Oncogênicas Virais/metabolismo , Proteínas E7 de Papillomavirus/metabolismo , Reação em Cadeia da Polimerase , RNA Mensageiro/metabolismo , Proteínas Repressoras/metabolismo , Análise de Sequência de DNA , Neoplasias do Colo do Útero/metabolismo , Neoplasias do Colo do Útero/patologia
7.
Cancer Radiother ; 14(8): 755-8, 2010 Dec.
Artigo em Francês | MEDLINE | ID: mdl-20673736

RESUMO

PURPOSE: To assess the outcome and the management of solitary extramedullary plasmocytoma in the head and neck region. PATIENTS AND METHODS: From 1997 to 2008, five cases of solitary extramedullary plasmocytoma were treated in the department of radiotherapy at Salah-Azaiz Institute. Three patients had a solitary plasmocytoma of the nasal fossa; the others were ethmoidal and submandibular node. All patients received irradiation of 40 to 45 Gy in the primary site associated to surgery in four cases. Among the five patients, two had radiotherapy after recurrence. RESULTS: Four complete responses were noted with a follow-up of 12, 36, 52 and 72 months. Multiple myeloma occurred in one patient 8 years after treatment. CONCLUSION: Radiotherapy is the best effective local treatment. Local control of extramedullary plasmocytoma in the head and neck region seems to be improved when the dose is at least 45 Gy. Predictive parameters of unfavourable outcome and conversion of extramedullary plasmocytoma to multiple myeloma should be better defined.


Assuntos
Neoplasias de Cabeça e Pescoço/radioterapia , Plasmocitoma/radioterapia , Adulto , Idoso , Antineoplásicos/uso terapêutico , Terapia Combinada , Progressão da Doença , Osso Etmoide/patologia , Osso Etmoide/cirurgia , Feminino , Neoplasias de Cabeça e Pescoço/patologia , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Masculino , Neoplasias Maxilares/patologia , Neoplasias Maxilares/radioterapia , Neoplasias Maxilares/cirurgia , Pessoa de Meia-Idade , Mieloma Múltiplo/tratamento farmacológico , Mieloma Múltiplo/radioterapia , Invasividade Neoplásica , Recidiva Local de Neoplasia/radioterapia , Neoplasias Nasais/radioterapia , Neoplasias Nasais/cirurgia , Plasmocitoma/patologia , Plasmocitoma/cirurgia , Indução de Remissão , Neoplasias Cranianas/patologia , Neoplasias Cranianas/radioterapia , Neoplasias Cranianas/cirurgia , Resultado do Tratamento
8.
Cancer Radiother ; 14(1): 29-33, 2010 Jan.
Artigo em Francês | MEDLINE | ID: mdl-19897396

RESUMO

PURPOSE: The objective of this work was the study of in vivo dosimetry performed in a series of 54 patients receiving total body irradiation (TBI) at the Salah-Azaiz Institute of Tunis since 2004. In vivo dosimetry measurements were compared to analytically calculated doses from monitor units delivered. PATIENTS AND METHOD: The irradiation was conducted by a linear accelerator (Clinac 1800, Varian, Palo Alto, USA) using nominal X-rays energies of 6 MV and 18 MV, depending on the thickness of the patient at the abdomen. The dose was measured by semi-conductors p-type EPD-20. These diodes were calibrated in advance with an ionization chamber "PTW Farmer" type of 0.6cm(3) and were placed on the surface of plexiglas phantom in the same TBI conditions. A study of dosimetric characteristics of semi-conductors EPD-20 was carried out as a function of beam direction and temperature. Afterwards, we conducted a comparative analysis of doses measured using these detectors during irradiation to those calculated retrospectively from monitor units delivered to each patient conditioned by TBI. RESULTS: Experience showed that semi-conductors are sensitive to the angle of beam radiation (0-90 degrees ) and the temperature (22-40 degrees C). The maximum variation is respectively 5 and 7%, but in our irradiation conditions these correction factors are less than 1%. The analysis of the results of the in vivo dosimetry had shown that the ratio of the average measured doses and analytically calculated doses at the abdomen, mediastina, right lung and head are 1.005, 1.007, 1.0135 and 1.008 with a standard deviation "type A" respectively of 3.04, 2.37, 7.09 et 4.15%. CONCLUSION: In vivo dosimetry by semi-conductors is in perfect agreement with dosimetry by calculation. However, in vivo dosimetry using semiconductors is the only technique that can reflect the dose actually received instantly by the patient during TBI given the many factors that calculation can not take into account: patient and organs motions and the heterogeneity of the targets.


Assuntos
Radiometria/métodos , Irradiação Corporal Total/métodos , Humanos , Neoplasias/radioterapia , Dosagem Radioterapêutica
9.
J Immunoassay Immunochem ; 30(1): 82-96, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19117204

RESUMO

Results obtained in the present work indicated that the Luminex assay is more sensitive than ELISA. The reactivity to the early antigens E6 and E7 was 37% versus 42% for HPV 16 and 21% versus 20% for HPV 18 among cervical cancer cases using ELISA. However, these ratios were 44% and 61%, respectively, for E6 and E7 HPV 16 versus 28% and 21% for E6 and E7 HPV 18 when using the Luminex technique. Data also indicated that HPV 16 and HPV 18 showed distinct profiles for the different antigens tested. Finally, the differences in antibody responses between cervical cancer cases and benign cases toward the different antigens were significant.


Assuntos
Anticorpos Antivirais/sangue , Papillomavirus Humano 16/imunologia , Papillomavirus Humano 18/imunologia , Infecções por Papillomavirus/imunologia , Neoplasias do Colo do Útero/imunologia , Formação de Anticorpos/imunologia , Proteínas do Capsídeo/imunologia , Feminino , Humanos , Proteínas Oncogênicas Virais/imunologia , Proteínas E7 de Papillomavirus/imunologia , Infecções por Papillomavirus/epidemiologia , Infecções por Papillomavirus/virologia , Proteínas Repressoras/imunologia , Tunísia/epidemiologia , Neoplasias do Colo do Útero/epidemiologia , Neoplasias do Colo do Útero/virologia
10.
Cancer Radiother ; 13(1): 30-6, 2009 Jan.
Artigo em Francês | MEDLINE | ID: mdl-18790660

RESUMO

PURPOSE: The aim of this study is to analyze the results and the complications of radiotherapy in the treatment of retinoblastoma. PATIENTS AND METHODS: Between 1994 and 2004, 40 children received radiotherapy for a retinoblastoma in Salah Azaiz Institute. The average age of the patients was 36 months (four to 132 months). There were 16 girls and 24 boys. Sixteen children presented a bilateral disease and 24 children a unilateral disease. Twenty eyes and thirty-six orbital cavities in 40 children with retinoblastoma were treated by radiotherapy. One child with a unilateral anterior retinoblastoma was treated with 106 ruthenium brachytherapy. External radiotherapy has been used to treat the 39 patients. In 20 cases the irradiation was conservative and in 36 cases postoperatively. The latter (n=36) presented at least one risk factor of relapses noted in the histological examination. The average dose was 44 Gy (1.8 to 2 Gy per fraction, five fractions weekly). This radiotherapy was associated with chemotherapy in 24 cases. RESULTS: Thirty-five children were followed with an average follow-up of 53 months (3-108 months). The average delay of relapses was of 10 months (two to 26 months). We found four orbital relapses and seven metastasis in nine children. The conservation of the eye with a useful visual field was noted in 18 cases among the 20 conservative irradiated eyes. The major therapeutic complication was the growth defect of the bones face. A femoral bone sarcoma was noted five years after the end of the irradiation and chemotherapy in one case. CONCLUSION: If the radiotherapy offers the advantage of the functional conservation and the improvement of the local control, its indications are more and more restricted in favor of the other therapeutic methods (chemotherapy, thermochemotherapy) and this considering the iatrogene risk. The development of new techniques of brachytherapy and the progresses of the conformational radiotherapy appear to reduce considerably this risk.


Assuntos
Neoplasias da Retina/radioterapia , Retinoblastoma/radioterapia , Braquiterapia , Catarata/epidemiologia , Catarata/etiologia , Quimioterapia Adjuvante , Criança , Pré-Escolar , Consanguinidade , Irradiação Craniana , Enucleação Ocular , Feminino , Humanos , Lactente , Masculino , Recidiva Local de Neoplasia/epidemiologia , Estadiamento de Neoplasias , Seleção de Pacientes , Radioterapia/efeitos adversos , Radioterapia/métodos , Dosagem Radioterapêutica , Radioterapia Adjuvante , Radioterapia Conformacional , Restrição Física/métodos , Neoplasias da Retina/etiologia , Neoplasias da Retina/mortalidade , Retinoblastoma/etiologia , Retinoblastoma/mortalidade , Estudos Retrospectivos , Resultado do Tratamento , Tunísia/epidemiologia
11.
Pathol Biol (Paris) ; 57(5): 415-9, 2009 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-18586408

RESUMO

OBJECTIVE: The aim of this study is to use a novel ELISA, based on five recombinant HPV-16 and HPV-18 proteins, for detection HPV-specific antibodies in a case-control study. PATIENTS AND METHODS: L1, E6 and E7 genes have been over expressed in Escherichia coli as double fused proteins. These recombinant proteins were used in a GST-capture ELISA as coating antigens. Human sera were collected from women with cervical cancer. Negative human sera were collected from patients apparently healthy and may be affected by other infectious agents. RESULTS: Most of the sera showed a positive reactivity to at least one of the HPV-16 or HPV-18 proteins (52/71). A percentage of 39.50% of the sera from HPV-16 infected women and 21.12% of the sera from women infected by HPV-18 genotype recognised at least one of the HPV-16 or HPV-18 proteins. Sera showed different reactivity to L1, E6 and E7 antigens, and only a few serum samples reacted to L1, E6 and E7 HPV-16, E6 and E7 HPV-18 (co-infection). Differences of reactivity between cases and controls were significant (P<0.0001). CONCLUSION: This novel ELISA, based on recombinant HPV-16 and HPV-18 antigens, is able to detect antibodies in women infected by HPV genotypes. The assay is easy to perform and has low cost, making it suitable for monitoring the natural history of HPV infections as well as for detecting pre-existing HPV antibodies in women who receive vaccination.


Assuntos
Anticorpos Antivirais/sangue , Antígenos Virais/imunologia , Carcinoma de Células Escamosas/sangue , Ensaio de Imunoadsorção Enzimática , Papillomavirus Humano 16/imunologia , Papillomavirus Humano 18/imunologia , Infecções por Papillomavirus/sangue , Neoplasias do Colo do Útero/sangue , Adulto , Antígenos Virais/genética , Proteínas do Capsídeo/genética , Proteínas do Capsídeo/imunologia , Carcinoma de Células Escamosas/virologia , Estudos de Casos e Controles , Proteínas de Ligação a DNA/genética , Proteínas de Ligação a DNA/imunologia , Feminino , Papillomavirus Humano 16/genética , Papillomavirus Humano 18/genética , Humanos , Proteínas Oncogênicas Virais/genética , Proteínas Oncogênicas Virais/imunologia , Proteínas E7 de Papillomavirus , Infecções por Papillomavirus/virologia , Proteínas Recombinantes de Fusão/genética , Proteínas Recombinantes de Fusão/imunologia , Proteínas Repressoras/genética , Proteínas Repressoras/imunologia , Estudos Soroepidemiológicos , Tunísia/epidemiologia , Neoplasias do Colo do Útero/virologia
12.
Cancer Radiother ; 12(8): 860-2, 2008 Dec.
Artigo em Francês | MEDLINE | ID: mdl-18571966

RESUMO

Medulloblastoma is a common paediatric brain tumor. Its prognosis is improved since the use of radiotherapy after surgery. This radiotherapy, so widely and complex, has one purpose: tumor control with less toxicity. Frontal relapse of medulloblastoma is not rare. Two hypothesis were proposed to explain this failure pattern: a geographic miss in cribriform plate due to targeting deviation and the migration of tumor cells to the cribriform plate caused by the "face down position" of the patient during surgery. We report the case of a 10-year-old boy who was treated in 1998 for a medulloblastoma with surgery and radiotherapy of the craniospinal axis (24 Gy) and the posterior fossa (54 Gy). Four years later, tumor relapsed only in the frontal area. A new surgery and chemotherapy were used with a complete response. A second frontal relapse associated with posterior fossa recurrence was detected after one year of the second treatment and treated by chemotherapy. Frontal relapse in medulloblastoma is an avoidable failure pattern when surgical and radiotherapeutic procedures are well controlled.


Assuntos
Neoplasias Encefálicas/radioterapia , Neoplasias Encefálicas/cirurgia , Neoplasias Cerebelares/diagnóstico por imagem , Meduloblastoma/radioterapia , Meduloblastoma/cirurgia , Recidiva Local de Neoplasia/diagnóstico por imagem , Neoplasias Cerebelares/tratamento farmacológico , Neoplasias Cerebelares/cirurgia , Criança , Terapia Combinada , Humanos , Ifosfamida/uso terapêutico , Masculino , Recidiva Local de Neoplasia/tratamento farmacológico , Recidiva Local de Neoplasia/cirurgia , Radiografia , Resultado do Tratamento
13.
J Immunoassay Immunochem ; 29(3): 266-80, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18569375

RESUMO

Results obtained in the present work indicated that the Luminex assay is more sensitive than ELISA. The reactivity to the early antigens E6 and E7 was 37% versus 42% for HPV 16 and 21% versus 20% for HPV 18 among cervical cancer cases using ELISA. However, these ratios were 44% and 61%, respectively, for E6 and E7 HPV 16 versus 28% and 21% for E6 and E7 HPV 18 when using the Luminex technique. Data also indicated that HPV 16 and HPV 18 showed distinct profiles for the different antigens tested. Finally, the differences in antibody responses between cervical cancer cases and benign cases toward the different antigens were significant.


Assuntos
Anticorpos Antivirais/sangue , Papillomavirus Humano 16/imunologia , Papillomavirus Humano 18/imunologia , Imunoensaio/métodos , Proteínas Oncogênicas Virais/sangue , Infecções por Papillomavirus/diagnóstico , Neoplasias do Colo do Útero/imunologia , Proteínas do Capsídeo/imunologia , Estudos de Casos e Controles , Proteínas de Ligação a DNA/imunologia , Feminino , Humanos , Proteínas Oncogênicas Virais/imunologia , Proteínas E7 de Papillomavirus/imunologia , Tunísia , Neoplasias do Colo do Útero/virologia
14.
Cancer Radiother ; 12(2): 73-7, 2008 Mar.
Artigo em Francês | MEDLINE | ID: mdl-18243752

RESUMO

PURPOSE: This study aims to evaluate local failure patterns in node negative breast cancer patients treated with post-mastectomy radiotherapy including internal mammary chain only. PATIENTS AND METHODS: Retrospective analysis of 92 internal or central-breast node-negative tumours with mastectomy and external irradiation of the internal mammary chain at the dose of 50 Gy, from 1994 to 1998. RESULTS: Local recurrence rate was 5 % (five cases). Recurrence sites were the operative scare and chest wall. Factors associated with increased risk of local failure were age < or = 40 years and tumour size greater than 20mm, without statistical significance. CONCLUSION: Post-mastectomy radiotherapy should be discussed for a sub-group of node-negative patients with predictors factors of local failure such as age < or = 40 years and larger tumour size.


Assuntos
Neoplasias da Mama/prevenção & controle , Mastectomia , Recidiva Local de Neoplasia/prevenção & controle , Adulto , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Radioterapia , Estudos Retrospectivos , Parede Torácica
15.
Cancer Radiother ; 11(8): 500-2, 2007 Dec.
Artigo em Francês | MEDLINE | ID: mdl-17959408

RESUMO

Gingival metastases are very rare. We report the case of a 47 year-old man presenting with a gingival metastasis from a non small cell lung carcinoma. According to the literature, the most probable way of spread of such metastasis is haematogenous. Local implantation of cancer cells, present in patient's expectorations, in a fragile gingiva may be an other pathway of lung cancer metastasizing in this region as we will try to describe in this case report. Cytological and/or histological investigation is needed to assess the malignant and the metastatic character of these gingival lesions. A rapid regression is observed after a flash of external beam radiation; nevertheless metastasis prognosis depends on the primary tumour progress.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/patologia , Neoplasias Gengivais/secundário , Neoplasias Pulmonares/patologia , Metástase Neoplásica , Carcinoma Pulmonar de Células não Pequenas/sangue , Humanos , Neoplasias Pulmonares/sangue , Masculino , Pessoa de Meia-Idade , Dosagem Radioterapêutica
16.
Cancer Radiother ; 11(8): 490-4, 2007 Dec.
Artigo em Francês | MEDLINE | ID: mdl-17714971

RESUMO

Extramedullary haematopoiesis is a physiologic response to chronic anaemia, commonly observed in various haematological disorders. This phenomenon is habitually asymptomatic but it may induce compression of adjacent organs such as the spinal cord. We present the cases of two patients suffering from chronic anaemia, who developed foci of ectopic hematopoiesis, and we discuss through a review of literature, the presentation and the management of this disease, with focus on the role of decompressive radiotherapy.


Assuntos
Hematopoese Extramedular , Esplenectomia/efeitos adversos , Talassemia/etiologia , Abdome , Adolescente , Adulto , Anemia/etiologia , Doenças Hematológicas/etiologia , Humanos , Masculino , Radiografia Torácica , Tomografia Computadorizada por Raios X
17.
Cancer Radiother ; 11(5): 234-40, 2007 Sep.
Artigo em Francês | MEDLINE | ID: mdl-17631405

RESUMO

PURPOSE: To study the clinical, radiological, therapeutic and progressive aspects of brain radionecrosis after treatment for nasopharyngeal carcinoma. PATIENTS AND METHODS: Nine patients (seven men and two women) of mean age 47.7 years old (extremes: 18-57 years old) were treated for UCNT (undifferentiated carcinoma of the nasopharynx) between 1989 and 2003 and developed cerebral radionecrosis. All patients were treated with radical radiotherapy. The mean total dose was 73.5 Gy (70-75 Gy). Dose per fraction was 2 to 2.5 Gy, one fraction daily. One patient received adjuvant brachytherapy to the dose of 8 Gy and four patients also received chemotherapy. RESULTS: Brain radionecrosis was authenticated by brain imaging (CT scan+/-MRI): the imaging was ordered in seven cases to elucidate non-specific neurological signs and two cases were discovered fortuitously. The time to the appearance of neurological signs was 40.3 months (10 to 108 months). The localization was temporal in six cases, parieto-occipital (one case) and bulbomedullar (two cases). After a mean follow-up period of 30.6 months (12-84 months), clinical outcomes were favorable in all cases receiving medical treatment (corticoids), with a stabilization of the radiological lesions in eight cases and complete radiological regression in one patient. CONCLUSION: Brain radionecrosis is a late complication rarely occurring in patients irradiated for UCNT. Imaging techniques (CT scan but more so MRI) play a major role in the diagnosis. Corticotherapy resulted in a durable objective response in all patients and, in most cases, resulted in radiological stabilization.


Assuntos
Encéfalo/patologia , Neoplasias Nasofaríngeas/radioterapia , Lesões por Radiação/patologia , Radioterapia/efeitos adversos , Adolescente , Corticosteroides/uso terapêutico , Adulto , Fatores Etários , Analgésicos/uso terapêutico , Barreira Hematoencefálica , Braquiterapia , Fracionamento da Dose de Radiação , Feminino , Seguimentos , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Neoplasias Nasofaríngeas/patologia , Nasofaringe/patologia , Necrose , Estadiamento de Neoplasias , Lesões por Radiação/diagnóstico , Lesões por Radiação/diagnóstico por imagem , Lesões por Radiação/tratamento farmacológico , Lesões por Radiação/etiologia , Dosagem Radioterapêutica , Indução de Remissão , Fatores de Risco , Fatores de Tempo , Tomografia Computadorizada por Raios X
18.
Gynecol Obstet Fertil ; 35(6): 536-40, 2007 Jun.
Artigo em Francês | MEDLINE | ID: mdl-17543568

RESUMO

OBJECTIVE: Therapeutic results of Hodgkin disease (HD) have improved by the use of combined radio-chemotherapy. However, this association can increase the risk of on-term effects including secondary cancers. In a retrospective study, we collected secondary breast cancer (BC) in patients previously treated with chemoradiotherapy for Hodgkin disease at Salah-Azaïz institute of Tunis. PATIENTS AND METHODS: Between 1975 and 2003, seven patients (six women and one man) treated for HD subsequently developed BC. Mean age at diagnosis of HD was 21 years (12-29). The first treatment was combined chemotherapy (MOPP-ABVD) and radiotherapy for all patients. Radiotherapy was delivered with cobalt 60 with large fields. The median dose was 41.3 Gy (2 Gy/fraction in 6 patients and 3.3 Gy in one). RESULTS: The breast tumours occurred after a median delay of 204 months (132-276). According to the TNM classification, we showed two stage T2, one stage T3, two stage T4b and two stage T4d. The mean clinical size was 47 mm (25-80 mm). All patients had infiltrating carcinoma. Axillary node histological involvement was found in 6 cases. All patients were treated by mastectomy and chemotherapy. Only one patient had a locoregional irradiation. Median survival was 26.5 months (12-48). Four patients died and three are still alive at respectively 24, 31 and 144 months. DISCUSSION AND CONCLUSION: According to the previous data, breast cancer represents 6.3 to 9% of all second cancers occurring after HD treatment. We conclude that especially young women and girls treated for HD should be carefully monitored. We suggest that secondary BC be sometimes treated by conservative radiosurgical approach.


Assuntos
Neoplasias da Mama/induzido quimicamente , Carcinoma Ductal de Mama/induzido quimicamente , Doença de Hodgkin/tratamento farmacológico , Doença de Hodgkin/radioterapia , Neoplasias Induzidas por Radiação , Segunda Neoplasia Primária , Adolescente , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/radioterapia , Carcinoma Ductal de Mama/epidemiologia , Criança , Terapia Combinada , Feminino , Humanos , Masculino , Radioterapia/efeitos adversos , Radioterapia/métodos , Estudos Retrospectivos , Fatores de Risco , Fatores de Tempo , Tunísia/epidemiologia
19.
Cancer Radiother ; 11(3): 117-21, 2007 May.
Artigo em Inglês | MEDLINE | ID: mdl-17293150

RESUMO

PURPOSE: Nasopharyngeal cancer is the commonest head and neck cancer in Tunisia treated with radiotherapy. A dose effect relationship is established in this tumor. The aim of this study is to describe our Low-dose-rate endocavitary brachytherapy using a personalized mold called Tunis applicator. PATIENTS AND METHODS: Seven patients (4 males and 3 females) with histologically confirmed undifferentiated nasopharyngeal carcinoma (UCNT) were treated between 2002 and 2005. Five patients with primary cancer and 2 with recurrent disease received external beam radiation followed by endocavitary brachytherapy. The mean applied dose of endocavitary brachytherapy was 5.5 Gy for primary site after external beam radiation (70-74 Gy) and 30 Gy for recurrent disease after external beam radiation (38 Gy). We have developed a personalized applicator with a balloon to optimize the placement of sources and a better conformity using the computer tomography scanning. Critical normal structures were identified on orthogonal radiographs and the dose was optimized to avoid excessive doses to these structures. RESULTS: With a follow up of 18 months (8-41), only one local failure was observed, 3 years after external beam radiation therapy for a recurrent disease. Moderate grade mucositis was seen in most patients. One patient was diagnosed with bulb necrosis. CONCLUSION: Endobrachytherapy can provide effective treatment for nasopharyngeal carcinoma with an easy application of the brachytherapy procedure.


Assuntos
Braquiterapia/métodos , Carcinoma/radioterapia , Doenças Nasofaríngeas/radioterapia , Recidiva Local de Neoplasia/radioterapia , Adulto , Braquiterapia/instrumentação , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Mucosite/etiologia , Dosagem Radioterapêutica , Resultado do Tratamento
20.
Cancer Radiother ; 10(8): 595-601, 2006 Dec.
Artigo em Francês | MEDLINE | ID: mdl-17137818

RESUMO

Purpose was to describe the clinical, radiological and therapeutic features in primary liver lymphoma. We report the case of a 54-year-old patient, who is followed since the age of 20 years for neutropenia associated with mediastinal adenopathy. Systematical ultrasound find a mass of the left liver confirmed by Computed tomography (CT). Histological examination of laparoscopic liver biopsy specimens confirmed diffuse large-cell non-Hodgkin's lymphoma. The disease was confined to the liver without any evidence of extrahepatic involvement. The serology of Epstein Barr virus was highly positive. PET-scan show increased FDG uptake at the site of hepatic lesion and the mediastin. The patient received chemotherapy followed by radiation therapy of the left liver at the dose of 31 Gy. The patient was alive and free of disease 20 months after the diagnosis of primary liver lymphoma. The primary hepatic lymphoma is a rare malignancy, which classically affects 50-year-old patients with a male preponderance. The incidence is increased in immunosuppressed patients and some authors have suggested an association with hepatitis B or C infection, and with the Epstein Barr virus. The imaging studies including ultrasound, CT, magnetic resonance imaging (MRI) and now PET-scan help to establish the diagnosis and to the following. Treatment options are surgery, radiation, chemotherapy, or a combination.


Assuntos
Neoplasias Hepáticas , Linfoma de Células B , Anticorpos Monoclonais/uso terapêutico , Anticorpos Monoclonais Murinos , Antineoplásicos/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biópsia , Terapia Combinada , Ciclofosfamida/administração & dosagem , Ciclofosfamida/uso terapêutico , Diagnóstico Diferencial , Intervalo Livre de Doença , Doxorrubicina/administração & dosagem , Doxorrubicina/uso terapêutico , Seguimentos , Humanos , Fatores Imunológicos/uso terapêutico , Fígado/patologia , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/radioterapia , Linfoma de Células B/diagnóstico por imagem , Linfoma de Células B/patologia , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Tomografia por Emissão de Pósitrons , Prednisona/administração & dosagem , Prednisona/uso terapêutico , Dosagem Radioterapêutica , Rituximab , Fatores de Tempo , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Ultrassonografia , Vincristina/administração & dosagem , Vincristina/uso terapêutico
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