RESUMO
Adenocarcinoma is the most common histological type of lung carcinoma. Recently the histologic classification of adenocarcinomas in the lung was modified to better reflect biologic properties and prognosis. We reviewed the histology of all primary lung adenocarcinomas operated on in Iceland during a 20-year period and assessed the impact of histology on survival. This nationwide study included 285 patients (mean age 67 years, 57% female), who underwent resection in Iceland from 1991 to 2010. Tumors were reclassified according to the current IASLC/ATS/ERS classification system. Overall survival was estimated by the Kaplan-Meier method and Cox regression analysis used to evaluate prognostic factors of overall mortality. Acinar predominant adenocarcinoma was the most common histological subtype (46%) followed by solid-predominant (SPA) with mucin production comprised (23%). Non-invasive carcinomas were rare. A difference in survival between the histological adenocarcinoma subtypes was not seen (p = 0.32) and multivariate analysis showed that advanced stage and age predicted worse outcome, but histologic subtyping of adenocarcinoma did not. In this nation-wide study there was not a statistical difference in survival according to adenocarcinoma subtypes and the histological subtype did not predict mortality. Preinvasive and minimally invasive adenocarcinomas were rare.
Assuntos
Adenocarcinoma/patologia , Adenocarcinoma/cirurgia , Neoplasias Pulmonares/patologia , Neoplasias Pulmonares/cirurgia , Adenocarcinoma/classificação , Adenocarcinoma/mortalidade , Adenocarcinoma de Pulmão , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Islândia/epidemiologia , Neoplasias Pulmonares/classificação , Neoplasias Pulmonares/mortalidade , Masculino , Pessoa de Meia-Idade , Prognóstico , Análise de Sobrevida , Resultado do TratamentoRESUMO
There are three prolyl hydroxylases (PHD1, 2 and 3) that regulate the hypoxia-inducible factors (HIFs), the master transcriptional regulators that respond to changes in intracellular O(2) tension. In high O(2) tension (normoxia) the PHDs hydroxylate two conserved proline residues on HIF-1α, which leads to binding of the von Hippel-Lindau (VHL) tumour suppressor, the recognition component of a ubiquitin-ligase complex, initiating HIF-1α ubiquitylation and degradation. However, it is not known whether PHDs and VHL act separately to exert their enzymatic activities on HIF-1α or as a multiprotein complex. Here we show that the tumour suppressor protein LIMD1 (LIM domain-containing protein) acts as a molecular scaffold, simultaneously binding the PHDs and VHL, thereby assembling a PHD-LIMD1-VHL protein complex and creating an enzymatic niche that enables efficient degradation of HIF-1α. Depletion of endogenous LIMD1 increases HIF-1α levels and transcriptional activity in both normoxia and hypoxia. Conversely, LIMD1 expression downregulates HIF-1 transcriptional activity in a manner depending on PHD and 26S proteasome activities. LIMD1 family member proteins Ajuba and WTIP also bind to VHL and PHDs 1 and 3, indicating that these LIM domain-containing proteins represent a previously unrecognized group of hypoxic regulators.
Assuntos
Subunidade alfa do Fator 1 Induzível por Hipóxia/metabolismo , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Proteínas com Domínio LIM/metabolismo , Pró-Colágeno-Prolina Dioxigenase/metabolismo , Proteína Supressora de Tumor Von Hippel-Lindau/metabolismo , Hipóxia Celular , Linhagem Celular Tumoral , Células HEK293 , Células HeLa , Humanos , Hidroxilação , Subunidade alfa do Fator 1 Induzível por Hipóxia/genética , Prolina Dioxigenases do Fator Induzível por Hipóxia , Immunoblotting , Imunoprecipitação , Peptídeos e Proteínas de Sinalização Intracelular/genética , Proteínas com Domínio LIM/genética , Modelos Biológicos , Poliubiquitina/metabolismo , Pró-Colágeno-Prolina Dioxigenase/genética , Complexo de Endopeptidases do Proteassoma/metabolismo , Ligação Proteica , Interferência de RNA , Transfecção , Técnicas do Sistema de Duplo-Híbrido , Ubiquitinação , Proteína Supressora de Tumor Von Hippel-Lindau/genéticaRESUMO
Tetraploidy and aneuploidy can be caused by cell division errors and are frequently observed in many human carcinomas. We have recently reported delayed cytokinesis in primary human fibroblasts from BRCA2 mutation carriers, implying a function for the BRCA2 tumour suppressor in completion of cell division. Here, we address ploidy aberrations in breast tumours derived from BRCA2 germline mutation carriers. Ploidy aberrations were evaluated from flow cytometry histograms on selected breast tumour samples (n=236), previously screened for local BRCA mutations. The ploidy between BRCA2-mutated (n=71) and matched sporadic (n=165) cancers was compared. Differences in ploidy distribution were examined with respect to molecular tumour subtypes, previously defined by immunohistochemistry on tissue microarray sections. Tetraploidy was significantly 3 times more common in BRCA2 breast cancers than sporadic. However, no differences were found in the overall ploidy distribution between BRCA2-mutation carriers and non-carriers. In BRCA2 cancers, tetraploidy was associated with luminal characteristics. The increased frequency of tetraploidy in BRCA2 associated cancers may be linked to cell division errors, particularly cytokinesis. Additionally, tetraploidy emerges predominantly in BRCA2 breast cancers displaying luminal rather than triple-negative phenotypes.
Assuntos
Neoplasias da Mama/genética , Genes BRCA2 , Tetraploidia , Aneuploidia , Neoplasias da Mama/metabolismo , Feminino , Citometria de Fluxo , Marcadores Genéticos/genética , Mutação em Linhagem Germinativa/genética , Humanos , Imuno-Histoquímica , Dados de Sequência Molecular , FenótipoRESUMO
Ovarian cancer causes more deaths than any other gynecologic malignancy in developed countries. Sixteen million sequence variants, identified through whole-genome sequencing of 457 Icelanders, were imputed to 41,675 Icelanders genotyped using SNP chips, as well as to their relatives. Sequence variants were tested for association with ovarian cancer (N of affected individuals = 656). We discovered a rare (0.41% allelic frequency) frameshift mutation, c.2040_2041insTT, in the BRIP1 (FANCJ) gene that confers an increase in ovarian cancer risk (odds ratio (OR) = 8.13, P = 2.8 × 10(-14)). The mutation was also associated with increased risk of cancer in general and reduced lifespan by 3.6 years. In a Spanish population, another frameshift mutation in BRIP1, c.1702_1703del, was seen in 2 out of 144 subjects with ovarian cancer and 1 out of 1,780 control subjects (P = 0.016). This allele was also associated with breast cancer (seen in 6/927 cases; P = 0.0079). Ovarian tumors from heterozygous carriers of the Icelandic mutation show loss of the wild-type allele, indicating that BRIP1 behaves like a classical tumor suppressor gene in ovarian cancer.
Assuntos
Proteínas de Ligação a DNA/genética , Mutação , Neoplasias Ovarianas/genética , RNA Helicases/genética , Proteínas de Grupos de Complementação da Anemia de Fanconi , Feminino , Humanos , Polimorfismo de Nucleotídeo ÚnicoRESUMO
The objective of this study was to re-examine histologically and restage thymic epithelial tumours during a 25-year period and to correlate clinical and follow-up data. We utilized centralized registries in Iceland to establish a true nationwide incidence rate, previously unreported. A retrospective whole population study was carried out by including all patients diagnosed with a thymic epithelial tumour in Iceland between 1 January 1984 and 30 April 2010. Medical records were reviewed and presenting symptoms, diagnostic procedures and surgical outcome tabulated. The histology of all cases was reclassified according to the 2004 World Health Organization classification (A-TC). The Masaoka system was used for tumour staging. Median follow-up was 67 months. A total of 19 patients were identified, 11 men (58%) and 8 women, with mean age at presentation of 63 years (31-87 years). The age-standardized incidence rate (ASR) was 0.3 and 0.2/100 000/year for men and women, respectively. Types B2 (n = 5) and A (n = 5) were the most common histological subtypes. Half of the patients had local symptoms, and eight were diagnosed incidentally. Of 19 patients, 11 underwent resection of the tumour through median sternotomy. Five-year overall survival was 53%. All four patients with thymic carcinoma (TC) died of disease within 2 years of diagnosis. For the other 15 patients, no recurrences were reported. Thymic tumours are rare in Iceland with an ASR (w) of 0.28 per 100 000 a year. To our knowledge, these are the first nationwide ASR (w) figures reported. The prognosis for most thymic epithelial cell tumours is excellent. However, TCs have a dismal long-term survival.
Assuntos
Timoma/epidemiologia , Timoma/patologia , Neoplasias do Timo/epidemiologia , Neoplasias do Timo/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Histocitoquímica , Humanos , Islândia/epidemiologia , Incidência , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Estudos RetrospectivosRESUMO
Sinus histiocytosis with massive lymphadenopathy or Rosai-Dorfman disease (RDD) is a rare histiocytic proliferative disorder of unknown etiology. Most patients present with lymph node involvement manifesting as adenopathy; however, RDD may arise primarily in a variety of extranodal sites, including bone. We report herein our experience with 15 cases of primary intraosseous RDD. The patients include 8 females and 7 males, who ranged in age from 3 to 56 (mean 27) years. The lesions arose in a variety of anatomical locations, including the tibia, femur, clavicle, skull, maxilla, calcaneus, phalanx, metacarpal, and sacrum. Radiographically, the lesions were lytic with well defined and usually sclerotic margins. Histologically, the lesions demonstrated the classic features of RDD and consisted of a mixed inflammatory infiltrate with numerous large histiocytes with abundant eosinophilic cytoplasm which exhibited emperipolesis. Some cases also contained numerous neutrophils. Immunohistochemical stains showed that the large histiocytes were S-100 positive. Follow-up information was available for 12 patients. Five patients eventually developed additional extraosseous manifestations, including testicular, lymph node, and subcutaneous lesions. One of these 5 also developed a new bony lesion within the sternum. One patient developed additional lesions within multiple bones of the hand and wrist, without extraosseous disease. One patient had stable bony lesions, whereas 5 remained disease free after treatment.
Assuntos
Doenças Ósseas/patologia , Osso e Ossos/patologia , Histiocitose Sinusal/patologia , Adolescente , Adulto , Doenças Ósseas/complicações , Doenças Ósseas/diagnóstico por imagem , Osso e Ossos/diagnóstico por imagem , Pré-Escolar , Feminino , Histiócitos/metabolismo , Histiócitos/patologia , Histiocitose Sinusal/complicações , Histiocitose Sinusal/diagnóstico por imagem , Humanos , Masculino , Pessoa de Meia-Idade , Radiografia , Proteínas S100/metabolismo , Adulto JovemRESUMO
INTRODUCTION: Mediastinoscopy is an important tool for staging lung cancer and evaluating mediastinal pathology. The objective of this retrospective study was to investigate the indications and safety of mediastinoscopy in a well defined cohort of patients. MATERIAL AND METHODS: All patients that underwent mediastinoscopy in Iceland between 1983-2007 were included. Clinical information was obtained from patient charts and pathology reports rewied. The study-period was divided into 5-year periods for comparison. RESULTS: Altogether 278 operations were performed but in 17 cases data was missing, leaving 261 patients for analysis (mean age 59 yrs, range 11-89, 159 males). A steady increase was seen in the number of operations, or from 16 to 85 during the first and last periods, respectively (p<0.01). Staging of lung cancer (61,3%), evaluation of mediastinal tumors (24,5%), and suspected sarcoidosis (8,8%) were the most common indications. Mean operating time was 30 minutes (range 10-320) and median hospital stay 1 day (range 0,5-26). The most common histological diagnosis were nonspecific changes (33,6%), lung cancer (23,8%) and sarcoidosis (12,7%). Seven patients (2.7%) had complications; including 4 (1.5%) with hoarsness due to left recurrent nerve injury, one (0,3%) with pneumothorax and two with >500 ml hemorrhage (1.1%). There were two operative deaths (<30 days), one due to major intraoperative bleeding. CONCLUSIONS: The number of mediastinoscopies is increasing in Iceland, especially as a part of lung cancer staging. Mediastinoscopy is a safe procedure with low mortality and morbidity, where a specific diagnosis is obtained in most cases.
Assuntos
Neoplasias Pulmonares/diagnóstico , Neoplasias do Mediastino/diagnóstico , Mediastinoscopia/tendências , Sarcoidose/diagnóstico , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Feminino , Humanos , Tempo de Internação , Neoplasias Pulmonares/cirurgia , Masculino , Neoplasias do Mediastino/cirurgia , Mediastinoscopia/efeitos adversos , Mediastinoscopia/mortalidade , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Valor Preditivo dos Testes , Estudos Retrospectivos , Medição de Risco , Sarcoidose/cirurgia , Fatores de Tempo , Resultado do Tratamento , Adulto JovemRESUMO
Lung cancer is the second most common cancer in Iceland and the most frequent cause of cancer related deaths. Smoking is by far the most important cause but familial factors also contribute. The symptoms of lung cancer are often subtle and the diagnosis, in about 70% of cases, is made when metastases have occurred. Curative surgical treatment is therefore only possible in about a third of the cases whereas other patients receive chemotherapy and/or radiation therapy. In recent years some important advances have been made in the diagnostic and therapeutic approaches to lung cancer. New imaging techniques have improved diagnosis and staging practices and consequently also treatment. Recent evidence suggests that screening with low dose CT may improve survival. New approaches to chemotherapy have been shown to improve survival and well being of patients with advanced disease. Chemotherapeutic agents are now being used in conjunction with surgery to reduce the risk of tumour spread. Furthermore, advances in surgical techniques have made resections possible in cases deemed inoperable in the past. In this review we present important advances in the diagnosis and treatment of lung cancer as reflected by recent literature that should be of interest to a wide variety of specialists.
Assuntos
Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/terapia , Quimioterapia Adjuvante , Predisposição Genética para Doença , Humanos , Islândia/epidemiologia , Neoplasias Pulmonares/epidemiologia , Neoplasias Pulmonares/etiologia , Neoplasias Pulmonares/patologia , Pneumonectomia , Radioterapia Adjuvante , Fatores de Risco , Fumar/efeitos adversos , Fatores de Tempo , Tomografia Computadorizada por Raios X , Resultado do TratamentoRESUMO
RATIONALE: The development of lung cancer (LC) is accompanied by field changes in the airway mucosa that may have prognostic importance. OBJECTIVES: To compare patients with prevalent LC to control subjects regarding their histologic dysplasia scores and chromosomal aneusomy as measured by fluorescence in situ hybridization (FISH). METHODS: The most advanced bronchial histology lesion was assessed from each of 44 LC cases and 90 cancer-free control subjects using a four-color FISH probe set encompassing the chromosome 6 centromere, 5p15.2, 7p12 (epidermal growth factor receptor), and 8q24 v-myc myelocytomatosis viral oncogene homolog (MYC) sequences. Histology grades were coded as dysplasia (moderate or severe) or carcinoma in situ (CIS). MEASUREMENTS AND MAIN RESULTS: CIS was the highest histologic grade for 32 subjects, and dysplasia was the highest grade for 102 subjects (54 moderate, 48 severe). Chromosomal aneusomy was seen in 64% of the LC cases, but in only 31% of the control subjects (odds ratio [OR], 4.68; 95% confidence interval [CI]. 1.97-11.04). Among those with any level of dysplasia, the OR for positive FISH and LC was 2.28 (95% CI, 0.75-6.86). Among those with CIS, the OR for positive FISH and LC was 5.84 (95% CI, 1.31-26.01). CONCLUSIONS: Chromosomal aneusomy is associated with LC. Prospective examination of aneusomy as a precursor lesion that predicts LC is needed.
Assuntos
Brônquios/patologia , Carcinoma in Situ/genética , Aberrações Cromossômicas , Células Epiteliais/patologia , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/patologia , Adulto , Idoso , Biomarcadores , Brônquios/citologia , Broncoscopia , Carcinoma in Situ/patologia , Estudos de Casos e Controles , Progressão da Doença , Feminino , Humanos , Hibridização in Situ Fluorescente , Neoplasias Pulmonares/fisiopatologia , Masculino , Pessoa de Meia-Idade , Invasividade Neoplásica , FumarRESUMO
An inevitable outcome of modern Medicine in any country is that some patients will experience adverse events, some of which would have been preventable. Different nations have developed various approaches to such cases; their legal efficacies are probably dissimilar and dependent on a number of disparate variables. An international "snapshot" of the results of the interacting forces can be obtained by asking physicians in several countries how they view selected subjective facets of their tort systems. In the U.S., many physicians view the structure of malpractice torts as unfair, and that belief is shared by at least some pathologists. The American Medical Association has declared that a multiregional malpractice "crisis" exists which raises medical costs and threatens access to care. Furthermore, malpractice tort decisions are often flawed scientifically because lay jurors and judges cannot properly evaluate the quality of "expert" testimony given by adversarial witnesses. Despite these factors, there has been little effort to investigate the views of pathologists on malpractice actions outside the U.S. In this paper, the authors have collected the responses of an international group of pathologists to a questionnaire on that topic. The respondents practice in academic centers in 15 countries outside the U.S. As expected, a range of views was represented, with some pathologists reporting that malpractice litigation was uncommon and others noting a worrisome trend toward its growth. Interestingly, so-called "defensive medicine" was found to be relatively common in pathology in many countries.
Assuntos
Internacionalidade/legislação & jurisprudência , Responsabilidade Legal , Patologia/legislação & jurisprudência , Centros Médicos Acadêmicos , Humanos , Responsabilidade Legal/economia , Patologia/economia , Inquéritos e QuestionáriosRESUMO
Spontaneous pneumothorax is a relatively common disease primarily affecting young and otherwise healthy individuals. Chest pain and dyspnea are the most common presenting symptoms and in majority of cases only a chest X-ray is needed to confirm the diagnosis. The initial treatment usually consist of a chest tube drainage, however, persistent airleakage and recurrent pneumothorax are frequent, these patients often requiring surgery. Open thoracotomy was the most common surgical approach with wedge resection of the leaking part of the lung. Today, video-assisted thoracoscopic surgery has in most centers replaced open surgery for spontaneous pneumothorax. In this article the presentation, diagnosis and treatment of spontaneous pneumothorax, including different surgical strategies, are reviewed in an evidence-based approach.
Assuntos
Drenagem , Pneumotórax/cirurgia , Cirurgia Torácica Vídeoassistida , Toracotomia , Dor no Peito/etiologia , Drenagem/instrumentação , Drenagem/métodos , Dispneia/etiologia , Humanos , Pneumotórax/complicações , Pneumotórax/diagnóstico , Radiografia Torácica , Recidiva , Reoperação , Cirurgia Torácica Vídeoassistida/instrumentação , Cirurgia Torácica Vídeoassistida/métodos , Toracotomia/instrumentação , Toracotomia/métodos , Resultado do TratamentoRESUMO
OBJECTIVE: To investigate the incidence of sarcoidosis in Iceland, its clinical manifestations and potential environmental influences. MATERIALS AND METHODS: All histopathological diagnoses of non-necrotizing granulomas generated in Iceland during the period 1981-2003 were reviewed with respect to a diagnosis of sarcoidosis. Further, patients were identified by searching hospital discharge diagnoses at the University Hospital in Reykjavik and the Regional Hospital in Northern Iceland. Only histologically verified cases were included. RESULTS: A total of 235 patients were found with histopathologically proven sarcoidosis. Limited to patients verified by tissue diagnosis, the annual incidence of sarcoidosis is 3,84/100.000/year. The incidence was found to be 2,8/100,000/year during the first half of the investigation period and 5,0/100,000/year during the second. This rate is lower than in other Nordic countries. There were 122 women and 113 men. The mean age at diagnosis was 50,8 years for women and 47,5 for men. The mean age at diagnosis was higher in Iceland than elsewhere. Clinically, respiratory symptoms predominated. Ocular symptoms and erythema nodosum are rare, and life-threatening cardiovascular and neurological manifestations are distinctly unusual. CONCLUSION: The low incidence is undoubtedly due to the strict inclusion criteria in the present study, i.e. only those with a tissue diagnosis were included. We have no explanation as to the higher age at diagnosis in Iceland than elsewhere. Registration of possible environmental factors and clinical evaluation may be improved.
Assuntos
Sarcoidose/epidemiologia , Adolescente , Adulto , Distribuição por Idade , Idoso , Idoso de 80 Anos ou mais , Criança , Feminino , Humanos , Islândia/epidemiologia , Incidência , Masculino , Pessoa de Meia-Idade , Fenótipo , Sarcoidose/diagnóstico , Sarcoidose/fisiopatologia , Distribuição por Sexo , Fatores de TempoRESUMO
The purpose of this study was to examine the pathology of all germ cell tumours of the testis diagnosed in Iceland 1955-2002. A total of 214 patients were included in the study. The current age-standardized incidence was found to be 6.1 per 100,000 and had increased almost fourfold during the study period. Seminoma was diagnosed in 55% of cases. Non-seminomas were diagnosed in 45%, and these were further classified as mixed germ cell tumours (33%), embryonal carcinoma (8%), teratoma (3%), and yolk sac tumour (n=1). The mean age at diagnosis was significantly higher for the seminomas than the non-seminomas (38 years versus 29 years) (p<0.001) and the non-seminomas were diagnosed at a significantly higher stage than the seminomas (p<0.001). Thus, in seminoma patients the tumour was localized to the testis (stage I) in 81% of cases, in 17% of patients the tumour had spread to the lymph nodes (stage II or III), and only 2% had extranodal metastasis at diagnosis (stage IV). In contrast, in the non-seminoma patients, the tumours were found to be stage I in 56%, stage II or III in 24%, and stage IV in 20% of cases. No significant difference in staging was found between non-seminoma subtypes. Identification of necrosis or vascular invasion was significantly associated with metastatic disease at diagnosis (p=0.002). During the study period a significant increase in stage I tumours was found as well as a decrease in the size of the tumours.