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1.
Clin Exp Dermatol ; 34(2): 192-4, 2009 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-18782323

RESUMEN

Sweet's syndrome (SS), a rare reactive neutrophilic dermatosis, has been reported to occur in association with a variety of systemic disorders, categorized by von den Diesch into idiopathic, paraneoplastic, pregnancy and parainflammatory subgroups. The parainflammatory group has been well defined, and includes a wide spectrum of infectious triggers and disorders of immune dysregulation. To date, however, no cases of SS have been described in the context of common variable immunodeficiency (CVID). We report a case of paediatric-onset SS, previously reported as idiopathic, with a subsequent diagnosis of CVID.


Asunto(s)
Bronquiectasia/complicaciones , Inmunodeficiencia Variable Común/complicaciones , Síndrome de Sweet/complicaciones , Adolescente , Factores de Edad , Edad de Inicio , Antiinfecciosos/uso terapéutico , Bronquiectasia/tratamiento farmacológico , Inmunodeficiencia Variable Común/tratamiento farmacológico , Inmunodeficiencia Variable Común/patología , Dapsona/uso terapéutico , Humanos , Pulmón/patología , Masculino , Síndrome de Sweet/tratamiento farmacológico , Síndrome de Sweet/patología , Resultado del Tratamiento
2.
Am J Transplant ; 8(9): 1891-900, 2008 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-18786232

RESUMEN

Organ transplant recipients have a higher incidence of melanoma compared to the general population but the prognosis of this potentially fatal skin cancer in this group of patients has not yet been established. To address this, we undertook a multicenter retrospective analysis to assess outcome for 100 melanomas (91 posttransplant and 9 pretransplant) in 95 individuals. Data were collected in 14 specialist transplant dermatology clinics across Europe belonging to the Skin Care in Organ Transplant Patients, Europe (SCOPE) Network, and compared with age, sex, tumor thickness and ulceration status-matched controls from the American Joint Committee on Cancer (AJCC) melanoma database. Outcome for posttransplant melanoma was similar to that of the general population for T1 and T2 tumors (< or = 2 mm thickness); but was significantly worse for T3 and T4 tumors (> 2 mm thickness); all nine individuals with a pretransplant melanoma survived without disease recurrence following organ transplantation. These data have implications for both cutaneous surveillance in organ transplant recipients and management of transplant-associated melanoma.


Asunto(s)
Melanoma , Trasplante de Órganos , Adulto , Estudios de Casos y Controles , Europa (Continente)/epidemiología , Neoplasias del Ojo/etiología , Neoplasias del Ojo/patología , Neoplasias del Ojo/cirugía , Femenino , Estudios de Seguimiento , Humanos , Incidencia , Masculino , Melanoma/epidemiología , Melanoma/patología , Melanoma/cirugía , Estudios Multicéntricos como Asunto , Estudios Retrospectivos , Neoplasias Cutáneas/etiología , Neoplasias Cutáneas/patología , Neoplasias Cutáneas/cirugía , Factores de Tiempo , Resultado del Tratamiento
3.
Sci Rep ; 7(1): 6739, 2017 07 27.
Artículo en Inglés | MEDLINE | ID: mdl-28751648

RESUMEN

We study the photoelectron spectra by intense laser pulses with arbitrary time dependence and phase within the Keldysh framework. An efficient semianalytical approach using analytical transition matrix elements for hydrogenic atoms in any initial state enables efficient and accurate computation of the photoionization probability at any observation point without saddle point approximation, providing comprehensive three dimensional photoelectron angular distribution for linear and elliptical polarizations, that reveal the intricate features and provide insights on the photoionization characteristics such as angular dispersions, shift and splitting of photoelectron peaks from the tunneling or above threshold ionization(ATI) regime to non-adiabatic(intermediate) and multiphoton ionization(MPI) regimes. This facilitates the study of the effects of various laser pulse parameters on the photoelectron spectra and their angular distributions. The photoelectron peaks occur at multiples of 2hω for linear polarization while  odd-ordered peaks are suppressed in the direction perpendicular to the electric field. Short pulses create splitting and angular dispersion where the peaks are strongly correlated to the angles. For MPI and elliptical polarization with shorter pulses the peaks split into doublets and the first peak vanishes. The carrier envelope phase(CEP) significantly affects the ATI spectra while the Stark effect shifts the spectra of intermediate regime to higher energies due to interference.

4.
Bone Marrow Transplant ; 37(6): 569-74, 2006 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-16462756

RESUMEN

The thalassemias are a heterogeneous group of inherited hypochromic anemias of varying severity. The mainstay of supportive treatment is regular blood transfusion accompanied by iron-chelating therapy. Hematopoietic stem cell transplantation (HSCT) provides an alternative option when curative therapy is considered. More than 400 patients in Taiwan have beta-thalassemia major or other transfusion-dependent thalassemias, and their treatment costs account for a considerable percentage of the National Health Insurance expenditure. In this report, we estimated the treatment costs of conventional therapy (regular blood transfusion accompanied by iron-chelating agents) and HSCT. The undiscounted medical cost of 20 years of follow-up (20 years from diagnosis) and the undiscounted total lifetime cost were NT$ 4 739 888 (NT$ means New Taiwan Dollars)/US$ 149 288 and NT$ 11 529 990/US$ 363 149, respectively, for patients undergoing conventional therapy, and NT$ 2 639 982/US$ 83 149 and NT$ 3 511 172/US$ 110 588, respectively, for those undergoing successful HSCT. Comparisons of treatment costs and other parameters between these two modalities can add to the information base on which policy is made by health authorities or clinicians.


Asunto(s)
Transfusión Sanguínea/economía , Costo de Enfermedad , Trasplante de Células Madre/economía , Talasemia beta/economía , Talasemia beta/terapia , Preescolar , Supervivencia sin Enfermedad , Femenino , Sangre Fetal/citología , Estudios de Seguimiento , Prueba de Histocompatibilidad , Humanos , Lactante , Masculino , Hermanos , Taiwán , Factores de Tiempo
5.
Cancer Res ; 58(2): 328-33, 1998 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-9443413

RESUMEN

Lung cancer is the leading and second-leading cause of cancer deaths among women and men in Taiwan, respectively. However, the molecular mechanisms involved in lung tumorigenesis in Taiwan remain poorly defined. A study that analyzed the mutation spectrum of the p53 tumor suppressor gene in 35 female lung cancer patients in Hong Kong showed that a high proportion of the mutations observed were deletions, suggesting the possible involvement of a distinct mutagenic factor(s) in Chinese female lung cancer patients (Y. Takagi et al., Cancer Res., 55: 5354-5357, 1995). Therefore, to gain insight into the role of the p53 tumor suppressor gene and possible etiological factors in lung tumorigenesis in Taiwan, we investigated the mutation spectra of exons 4-11 in the p53 tumor suppressor gene of 60 lung cancer patients in Taiwan. These data were also correlated with clinical pathological characteristics of patients. Lung tumors were surgically resected, genomic DNA was isolated, and their mutation spectra were examined using PCR/single-strand conformational polymorphism analysis and direct sequencing. The frequency of p53 gene mutation was 18% (11 of 60). However, distinct patterns of p53 gene mutation were observed. Seven of 11 mutations detected (64%) were deletions of 1-12 bp at G:C bp or at bp in the immediate vicinity of repetitive sequences and/or tandem repeat sequences. In addition, two patients (2 of 11, 18%) exhibited nonsense mutations. In contrast to the frequent occurrence of missense mutations in the p53 gene reported in the literature, the majority (82%) of the mutations in lung cancer patients in Taiwan were nonmissense mutations, ie., deletions and nonsense mutations. Immunohistochemical staining indicated that p53 mutations including non-in-frame deletions and nonsense mutations all resulted in no expression of p53 protein. Notably, mutations occurred more frequently in patients suffering from squamous cell carcinoma (SQ). Nine of 31 SQ patients (29%) exhibited deletions or nonsense mutations, suggesting that deletions and nonsense mutations in the p53 gene are involved in the formation of SQ in Taiwan. In addition, mutations occurred more frequently in patients with stage III or IV lung cancer. However, mutations were not correlated with patients' smoking habits. Our data suggest that p53 gene mutation involved in the formation of SQ and distinct environmental factor(s) and/or genetic factor(s) that induced specific short deletions in repeat sequences may be involved in lung tumorigenesis in Taiwan.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas/genética , Carcinoma de Células Pequeñas/genética , Eliminación de Gen , Genes p53/genética , Neoplasias Pulmonares/genética , Mutación/genética , Anciano , Secuencia de Bases , Carcinoma de Pulmón de Células no Pequeñas/metabolismo , Carcinoma de Pulmón de Células no Pequeñas/patología , Carcinoma de Células Pequeñas/metabolismo , Carcinoma de Células Pequeñas/patología , Análisis Mutacional de ADN , ADN de Neoplasias/análisis , Exones/genética , Femenino , Humanos , Inmunohistoquímica , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/patología , Masculino , Persona de Mediana Edad , Datos de Secuencia Molecular , Proteínas de Neoplasias/genética , Proteínas de Neoplasias/metabolismo , Reacción en Cadena de la Polimerasa , Taiwán , Proteína p53 Supresora de Tumor/metabolismo
6.
J Nucl Med ; 39(10): 1752-7, 1998 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-9776282

RESUMEN

UNLABELLED: Intratumoral injection of 90Y microspheres is a potential alternative in the treatment of primary liver tumor. However, complicated preparation and lack of a gamma ray for imaging are the disadvantages of 90Y. In this study, we used 188Re, a generator-produced radioisotope with 155-keV gamma ray emission, to label microspheres. After intratumoral injection of 188Re microspheres into rats with hepatoma, biodistributions and survival times were analyzed. METHODS: Twelve male rats with hepatoma were killed at 1, 24 and 48 hr (4 rats at each time point) after intratumoral injection of approximately 7.4 MBq 188Re microspheres. Samples of various organs were obtained and used to calculate the tissue concentrations. In addition, 30 male rats bearing hepatoma were divided into two groups (15 rats in each group) to evaluate survival time. Group 1 received intratumoral injection of 37 MBq 188Re microspheres, whereas Group 2 served as the control group and received an intratumoral injection of 0.1 ml normal saline only. Survival time was calculated from the day of injection to 2 mo after treatment. RESULTS: Radioactivity in the tumor was very high throughout. Biological half-time was 170.8 hr. Radioactivity in the lung was 1.78% injected dose (i.d.)/g at 1 hr but declined rapidly over time. The concentration in the urine was approximately 6.14% i.d./ml after the first hour and rapidly declined thereafter. The concentrations of radioactivity in other organs, such as normal liver, muscle, spleen, bone, testis and whole blood, were quite low throughout the study. Twelve of 15 (80%) of rats survived over 60 days after intratumoral injection of 188Re microspheres, whereas only 4 of 15 (26.7%) survived more than 60 days after injection of normal saline only. The difference between the groups was significant (p < 0.05). CONCLUSION: Rhenium-188 offers cost-effectiveness, on-site availability, short half-life, energetic beta particle, emission of gamma photons for imaging, easy preparation, easy clinical administration and apparent lack of radiation leakage from the treated tumor. Direct intratumoral injection of 188Re microspheres is extremely attractive as a clinical therapeutic alternative in hepatoma patients.


Asunto(s)
Neoplasias Hepáticas Experimentales/radioterapia , Radioisótopos/uso terapéutico , Renio/uso terapéutico , Animales , Femenino , Inyecciones Intralesiones , Masculino , Microesferas , Ratas , Ratas Sprague-Dawley , Distribución Tisular
8.
Surgery ; 125(3): 332-8, 1999 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-10076619

RESUMEN

BACKGROUND: Liver resection is risky in patients aged > or = 80 years. Because of short life expectancies and improved nonoperative modalities, the role of liver resection in octogenarians with hepatocellular carcinoma (HCC) is unclear. METHODS: A retrospective review of the operative results of 260 patients with HCC between 1991 and 1997 was performed. According to the age at the time of operation, these patients were divided into 2 groups. Group 1 comprised 21 patients aged > or = 80 years, and group 2 comprised the other 239 younger patients. The backgrounds, pathologic features of the tumor, and operative results of the patients were compared. RESULTS: Octogenarians had a higher incidence of associated medical diseases, a higher incidence of negative serum hepatitis B surface antigen, a lower alpha-fetoprotein level, and a higher indocyanine green retention rate. Although octogenarians had a longer postoperative hospital stay, there were no significant differences between the 2 groups regarding operative morbidity and mortality. The 5-year disease-free and actuarial survival rates for octogenarians and younger patients were 50.6% and 35.3% (P = .15) and 40.9% and 59.3% (P = .46), respectively. CONCLUSION: Under meticulous preoperative assessments and postoperative care, liver resection for HCC is justified in selected octogenarians, with short- and long-term results comparable to those of younger patients.


Asunto(s)
Carcinoma Hepatocelular/cirugía , Hepatectomía , Neoplasias Hepáticas/cirugía , Análisis Actuarial , Factores de Edad , Anciano , Anciano de 80 o más Años , Carcinoma Hepatocelular/sangre , Carcinoma Hepatocelular/complicaciones , Carcinoma Hepatocelular/patología , Supervivencia sin Enfermedad , Femenino , Hepatectomía/efectos adversos , Humanos , Neoplasias Hepáticas/sangre , Neoplasias Hepáticas/complicaciones , Neoplasias Hepáticas/patología , Masculino , Estudios Retrospectivos , Análisis de Supervivencia , Resultado del Tratamiento
9.
Surgery ; 123(3): 270-7, 1998 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-9526518

RESUMEN

BACKGROUND: Hepatic resection for multiple hepatocellular carcinomas (HCCs) involving both lobes of the liver is rarely recommended because of high operative risks and low radicality. Thus the justification of hepatic resection for bilobar multicentric HCC remains undefined. METHODS: Two hundred eleven patients with HCC, who underwent curative hepatic resection, were studied retrospectively. The patients were divided into two groups. Group A consisted of 39 patients with bilobar (both sides of Cantlie's line) multicentric HCCs. Group B consisted of 172 patients with HCC with solitary or unilobar lesions. The backgrounds and resectional results of patients in groups A and B were compared. RESULTS: Patients in group A usually required multiple separate liver resections and a longer operative time. However, the operative blood loss, amount of blood transfused, and operative morbidity and mortality rates were not significantly different. Patients in group A showed higher incidences of associated satellite nodules, microscopic vascular invasion, and a lack of capsules. The 6-year disease-free and actuarial survival rates of patients in groups A and B were 30.5% and 41.8% (p = 0.17) and 42.9% and 51.4% (p = 0.12), respectively. For patients in group A the presence of satellite nodules in any resected tumor was the only independent unfavorable feature that influenced the actuarial survival rate after multivariate analysis. CONCLUSIONS: Liver resection is justified for bilobar multicentric HCCs in selected patients, if the tumors can be totally resected. Postoperative adjuvant therapies should be considered when satellite nodules are present in any resected tumor.


Asunto(s)
Carcinoma Hepatocelular/cirugía , Hepatectomía/métodos , Neoplasias Hepáticas/cirugía , Adulto , Anciano , Carcinoma Hepatocelular/diagnóstico por imagen , Femenino , Humanos , Neoplasias Hepáticas/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia , Estudios Retrospectivos , Tasa de Supervivencia , Ultrasonografía
10.
Surgery ; 120(1): 34-9, 1996 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-8693420

RESUMEN

BACKGROUND: Resection for hepatocellular carcinoma in patients with cirrhosis and impaired liver function is usually unjustified because of higher surgical risks and poorer long-term prognosis. METHODS: A retrospective comparison of the background and resectional results of patients with cirrhosis and hepatocellular carcinoma was carried out between those with preoperative indocyanine green 15-minute retention rate of 20% or greater (group A, impaired function group, n = 36) and those with indocyanine green 15-minute retention rate of 10% or less (group B, normal function group, n = 34). RESULTS: The group A patients had significantly lower serum albumin level and higher serum bilirubin level, longer prothrombin time, higher incidence of associated esophageal varices, and poorer Child's classifications for cirrhosis. Although the tumor diameter in both groups was similar (A, 6.9 versus B, 7.1 cm; p = 0.94), the resected liver amount in group B was greater (227.4 versus 473.2 gm; p = 0.038) because of a greater extent of liver resection (p < 0.001) and a wider surgical margin (0.34 versus 1.85 cm; p < 0.0001). The amount of operative blood loss and blood transfusion, operative morbidity, and operative mortality were not different between the two groups. The pathologic characteristics and staging were also comparable. The 5-year disease-free and actuarial survival rates of groups A and B were 30.9% and 29.6% (p = 0.16) and 45.2% and 33.4% (p = 0.11), respectively. CONCLUSIONS: If the amount of resected nontumorous liver parenchyma could be reduced, resection of hepatocellular carcinoma in selected patients with cirrhosis and impaired liver function is still justified in spite of a narrow surgical margin.


Asunto(s)
Carcinoma Hepatocelular/cirugía , Cirrosis Hepática/cirugía , Neoplasias Hepáticas/cirugía , Hígado/fisiopatología , Adulto , Anciano , Carcinoma Hepatocelular/patología , Carcinoma Hepatocelular/fisiopatología , Femenino , Estudios de Seguimiento , Humanos , Neoplasias Hepáticas/patología , Neoplasias Hepáticas/fisiopatología , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Pronóstico , Estudios Retrospectivos
11.
Neuroreport ; 10(4): 789-93, 1999 Mar 17.
Artículo en Inglés | MEDLINE | ID: mdl-10208549

RESUMEN

The anticholinesterase effects of bis(7)-tacrine were compared with tacrine in vitro and in vivo. Based on IC50 ratios, the dimeric analog bis(7)-tacrine was, in a reversible manner, up to 150-fold more potent and 250-fold more selective than tacrine for acetylcholinesterase (AChE) over butyrylcholinesterase (BChE). Following a single oral administration, both bis(7)-tacrine and tacrine produced dose-dependent inhibitions of AChE in rat brain, but bis(7)-tacrine exhibited higher efficacy and AChE/BChE selectivity than tacrine. The anti-AChE efficacy of bis(7)-tacrine was quite similar following an oral or i.p. administration, but tacrine showed much lower efficacy when administered orally than when given i.p. These findings suggest bis(7)-tacrine, a highly potent and selective inhibitor of AChE, can probably be used as an improved drug in the palliative treatment of AD.


Asunto(s)
Acetilcolinesterasa/metabolismo , Enfermedad de Alzheimer/tratamiento farmacológico , Encéfalo/enzimología , Inhibidores de la Colinesterasa/farmacología , Nootrópicos/farmacología , Tacrina/análogos & derivados , Tacrina/farmacología , Animales , Encéfalo/efectos de los fármacos , Butirilcolinesterasa/metabolismo , Corteza Cerebral/efectos de los fármacos , Corteza Cerebral/enzimología , Femenino , Cinética , Masculino , Proteínas del Tejido Nervioso/biosíntesis , Ratas , Ratas Sprague-Dawley
12.
Arch Surg ; 135(11): 1273-9, 2000 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-11074879

RESUMEN

BACKGROUND: The role of surgical resection for hepatocellular carcinoma with tumor thrombi involving the major portal vein is controversial because of a high operative risk and poor prognosis. Previously, a resection was performed only when the tumor thrombi were limited to the first branch of the portal vein without extension to the portal bifurcation. HYPOTHESIS: Concomitant liver and portal vein resection may be beneficial in patients with hepatocellular carcinoma with tumor thrombi extending to portal bifurcation. DESIGN: Retrospective review. SETTING: University hospital, tertiary referral center. PATIENTS: Among 368 patients with hepatocellular carcinoma who underwent a curative resection, portal vein involvement occurred in 112 patients. Fifteen of the 112 patients underwent a concomitant liver and portal vein resection owing to extension of tumor thrombi to the portal bifurcation (group 1). The remaining 97 patients did not need portal vein resection (group 2). INTERVENTION: Surgical indications, procedures, and results of pathological examination of resected specimens were assessed in patients in group 1. The clinicopathological characteristics, operative morbidity and mortality, and operative results were compared between the 2 groups. MAIN OUTCOME MEASURES: Disease-free and actuarial survival rates. RESULTS: Intramural tumor infiltration was found at the site of thrombi adhesion to the portal vein cuff in 11 of 15 patients in group 1. Owing to patient selection bias, patients in group 1 were significantly younger and had better liver function and greater resected liver weight. The operative time, postoperative hospitalization, operative blood loss, amount of blood transfusion, and operative morbidity and mortality did not differ significantly between the 2 groups. The 5-year disease-free survival rates of groups 1 and 2 were 21.6% and 20.4% (P =.19), respectively, while the actuarial survival rates were 26. 4% and 28.5% (P =.33), respectively. CONCLUSION: Liver resection with partial resection of the portal vein is justified in selected patients with hepatocellular carcinoma with tumor thrombi extending to portal bifurcation.


Asunto(s)
Carcinoma Hepatocelular/cirugía , Hepatectomía , Neoplasias Hepáticas/cirugía , Células Neoplásicas Circulantes , Vena Porta/cirugía , Carcinoma Hepatocelular/mortalidad , Carcinoma Hepatocelular/patología , Estudios de Casos y Controles , Femenino , Estudios de Seguimiento , Humanos , Neoplasias Hepáticas/mortalidad , Neoplasias Hepáticas/patología , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Tasa de Supervivencia , Factores de Tiempo
13.
J Am Coll Surg ; 184(6): 611-7, 1997 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-9179118

RESUMEN

BACKGROUND: Radical gastrectomy with systematic lymphadenectomy (RG) remains controversial in the treatment of gastric carcinoma. On the other hand, the prognosis of gastric carcinoma, in the presence of intraperitoneal free cancer cells, is poor. The optimal surgical strategy for serosa-involved gastric carcinoma with intraperitoneal free cancer cells remains undefined. STUDY DESIGN: A prospective study of intraperitoneal cytologic washing was conducted on 134 patients with potentially curable serosa-involved gastric carcinoma who underwent RG. During the same period, 28 patients with resectable tumors who received palliative simple gastrectomies because of the presence of gross incurable conditions (eg, multiple hepatic metastases, peritoneal carcinomatosis, or extra-abdominal metastasis) were used as controls. RESULTS: Intraperitoneal free cancer cells were found in 26 patients (19.4 percent). Compared with the remaining 108 patients without free cancer cells, there were no significant differences in the clinicopathologic characteristics and pathologic stages. No patients died after palliative resection, but five patients died after RG. The patients with free intraperitoneal free cancer cells had a poorer long-term prognosis after RG than those without free cancer cells (p < 0.0001). The prognosis for such patients was similar to the prognosis of those who underwent palliative resection. CONCLUSIONS: A peritoneal washing cytologic examination is mandatory before resection for potentially curable serosa-involved gastric carcinoma. When free cancer cells appear in the washing fluid, the cancer is incurable. Simply gastrectomy without additional lymphadenectomy is the optimal strategy for treatment.


Asunto(s)
Gastrectomía/métodos , Lavado Peritoneal , Neoplasias Gástricas/cirugía , Anciano , Femenino , Humanos , Escisión del Ganglio Linfático , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia , Complicaciones Posoperatorias , Pronóstico , Estudios Prospectivos , Membrana Serosa , Neoplasias Gástricas/mortalidad , Neoplasias Gástricas/patología , Tasa de Supervivencia
14.
J Am Coll Surg ; 188(5): 508-15, 1999 May.
Artículo en Inglés | MEDLINE | ID: mdl-10235579

RESUMEN

BACKGROUND: For centrally located hepatocellular carcinoma (HCC), extended major hepatectomy is usually recommended, but the risk of postoperative liver failure is high when liver function is not sound. Mesohepatectomy (en bloc resection of Goldsmith and Woodburne's left medial and right anterior segments or Couinaud's segments IV, V, and VIII) is a rare procedure, so its role in treating HCC is unclear. STUDY DESIGN: We retrospectively reviewed 364 patients who underwent a curative resection for HCC. Among them, 15 patients were treated by mesohepatectomy. Their nontumorous liver revealed cirrhosis in 11 and chronic hepatitis in 4. The mean tumor diameter was 12.8 cm. In 10 of the 15 patients, HCC also invaded adjacent organs. The operative results of another 25 patients with different disease extent who underwent extended major hepatectomy were compared. RESULTS: The hepatic inflow occlusion time for mesohepatectomy was longer than for extended hepatectomy (p = 0.01). The mean operative blood loss, amount of blood transfusion, operating time, and postoperative hospital stay in the mesohepatectomy group were 2,450 mL, 1,100 mL, 7.9 hours, and 14.9 days, respectively. In the extended-hepatectomy group, the values were 1,863mL, 768mL, 5.8 hours, and 16.8 days, respectively (all p>0.05 compared with mesohepatectomy). No patient died after mesohepatectomy, but after extended hepatectomy there was one death from liver failure. The Union Internationale contre le cancer (UICC) TNM stages of patients who underwent mesohepatectomy were as follows: stage II in 1, stage III in 4, and stage IVA in 10. All patients who underwent extended hepatectomy presented with stage IVA disease. The 6-year disease-free and actuarial survival rates after mesohepatectomy were 21% and 30%, respectively. The 6-year disease-free survival rate after extended hepatectomy was 9% (p = 0.11 compared with mesohepatectomy). CONCLUSION: Although mesohepatectomy is time-consuming, it is justified for selected patients with centrally located large HCC in a diseased liver.


Asunto(s)
Carcinoma Hepatocelular/cirugía , Hepatectomía/métodos , Neoplasias Hepáticas/cirugía , Adulto , Anciano , Carcinoma Hepatocelular/mortalidad , Carcinoma Hepatocelular/patología , Hepatectomía/efectos adversos , Humanos , Neoplasias Hepáticas/mortalidad , Neoplasias Hepáticas/patología , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Tasa de Supervivencia
15.
AJNR Am J Neuroradiol ; 14(5): 1253-4, 1993.
Artículo en Inglés | MEDLINE | ID: mdl-8237712

RESUMEN

Neurilemmoma of the oculomotor nerve is rare and infrequently presents as an orbital mass. We report a neurilemmoma arising from the cavernous sinus with its major part extending into the orbit. The Antoni A part of the neurilemmoma showed intermediate signal intensity in both T1- and T2-weighted MR images and exhibited postcontrast enhancement. The Antoni B part revealed hypointensity on T1-weighted images, hyperintensity in T2-weighted images, and showed no contrast enhancement.


Asunto(s)
Neoplasias de los Nervios Craneales/diagnóstico , Imagen por Resonancia Magnética , Neurilemoma/diagnóstico , Nervio Oculomotor , Neoplasias Orbitales/diagnóstico , Adulto , Humanos , Masculino
16.
Nucl Med Biol ; 28(6): 727-32, 2001 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-11518655

RESUMEN

Rhenium-188 microsphere is a relatively new radiation synovectomy agent developed for the treatment of rheumatoid arthritis. It has been shown that the levels of unwanted extra-articular radiation are negligible with this agent. A histologic study was conducted to assess the effect of radiation synovectomy on synovium and articular cartilage after intra-articular injection of various doses of Re-188 microspheres into the knee joints of rabbits. Intra-articular injection of Re-188 microspheres into rabbit knee joints resulted in mild reactive inflammation and thrombotic occlusion of vessels which subsided rapidly. Sclerosis of subsynovium could be seen 12 weeks after injection. No evidence of damage to articular cartilage was noted. There was no significant difference in the articular pattern after injection of 0.3 or 0.6 mCi Re-188 microspheres. This study suggests that a treatment dose of Re-188 microspheres causes transient inflammation of synovium without any detectable damage to the articular cartilage of knee joint.


Asunto(s)
Artritis Reumatoide/radioterapia , Cartílago Articular/efectos de la radiación , Radioisótopos/farmacología , Renio/farmacología , Líquido Sinovial/efectos de la radiación , Animales , Antirreumáticos/farmacología , Antirreumáticos/uso terapéutico , Cartílago Articular/efectos de los fármacos , Cartílago Articular/patología , Articulación de la Rodilla/efectos de la radiación , Masculino , Microesferas , Conejos , Radioisótopos/uso terapéutico , Renio/uso terapéutico
17.
Anticancer Res ; 20(4): 2687-90, 2000.
Artículo en Inglés | MEDLINE | ID: mdl-10953344

RESUMEN

Little progress has been made in reducing lung cancer mortality by applying conventional methods to early diagnosis and screening. Recent advances in molecular oncology, however, have provided tools which may be of use in this area. p53 gene mutation is the most common gene alteration in the development of lung cancer. Conventional cytologic analysis of sputum is an insensitive test for the diagnosis of lung cancer. In this study, we attempted to establish a polymerase chain reaction (PCR)-based assay for assessing the possibility of early detection of p53 mutation in archival Papanicolaou-stained cytologic sputum smears. Ten sputum smear slides were collected prior to clinical diagnosis from 10 lung cancer patients who had been confirmed to have p53 mutations in surgically resected lung tumors. We successfully obtained sufficient amounts of RNA from each sputum smear specimen for amplification of PCR and direct sequencing. Only one patient was found to have p53 mutation at codon 286; the other nine patients had wild type p53 genes. This result supports the possibility that detection of p53 mutations in cytologic sputum smears is an available strategy for the early diagnosis of lung cancer.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas/genética , Genes p53 , Neoplasias Pulmonares/genética , Mutación , Esputo/química , Anciano , Carcinoma de Pulmón de Células no Pequeñas/diagnóstico , Humanos , Neoplasias Pulmonares/diagnóstico , Masculino , Persona de Mediana Edad , Reacción en Cadena de la Polimerasa , ARN/análisis
18.
Surg Clin North Am ; 80(6): 1779-86, 2000 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-11140872

RESUMEN

The significance of the sentinel lymph node (SLN) was examined in 58 Chinese breast cancer patients. The method of technetium-99m sulfur colloid injection and the intraoperative gamma probe was found to be very useful for identifying the SLN. The positive predictive value was 64.5%, and the negative predictive value was 93.2%. Findings suggest that lymph node dissection is not necessary in breast cancer patients with a negative SLN.


Asunto(s)
Neoplasias de la Mama/patología , Cámaras gamma , Escisión del Ganglio Linfático , Metástasis Linfática/diagnóstico por imagen , Metástasis Linfática/patología , Selección de Paciente , Biopsia del Ganglio Linfático Centinela/métodos , Azufre Coloidal Tecnecio Tc 99m , Adulto , Anciano , Neoplasias de la Mama/cirugía , Distribución de Chi-Cuadrado , Femenino , Humanos , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Cintigrafía , Biopsia del Ganglio Linfático Centinela/instrumentación , Taiwán
19.
Int J Food Microbiol ; 67(1-2): 81-8, 2001 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-11482572

RESUMEN

The effects of carbon and nitrogen sources, incubation temperature, shaking speed, initial pH of culture broth as well as various concentration of NaCl on the production of cytotoxin by Salmonella choleraesuis SC-5 were evaluated in the present study. Results reveal that the optimal temperature, initial medium pH and shaking speed for cytotoxin production was 37 degrees C, pH 6.0-8.0 and 100 rpm, respectively. Tryptone was the best of the eight nitrogen sources tested for toxin production by S. choleraesuis. Among the nine carbon sources tested, S. choleraesuis produced a higher amount of cytotoxin in media containing glucose, fructose, galactose, sorbitol or mannitol as the carbon source. No toxin was detected in broths containing 4.0% or more sodium chloride in Tryptic soy broth (TSB). Cultures of S. choleraesuis in the medium containing 2.0% tryptone, 0.5% NaCl, 0.25% K2HPO4 and 0.25% of the best carbon source under the optimal conditions for 14 h resulted in the highest cytotoxin production. The Vero cell CD50 of S. choleraesuis lysate of cells grown under these optimal conditions was a titer of 589-758 per mg of lysate protein.


Asunto(s)
Medios de Cultivo , Citotoxinas/biosíntesis , Salmonella/crecimiento & desarrollo , Carbono/farmacología , Heces/microbiología , Humanos , Concentración de Iones de Hidrógeno , Nitrógeno/farmacología , Salmonella/efectos de los fármacos , Salmonella/patogenicidad , Cloruro de Sodio/farmacología , Temperatura
20.
Clin Nephrol ; 52(1): 5-9, 1999 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-10442489

RESUMEN

AIM: To define the long-term outcome of patients with minimal urinary abnormalities (defined by the presence of microscopic hematuria with no or less than 1 gm/day proteinuria), and normal renal function (defined by a serum creatinine < 1.3 mg/dl), we retrospectively studied patients who fulfilled the above criteria and had a kidney biopsy done before the year of 1992 (i.e. at least followed up for 5 years), with a definite pathological diagnosis. METHODS: A total of 41 cases among 719 cases of primary glomerulonephritis (5.7%) were enrolled into the study. There were 19 males and 22 females with a mean age of 35.4+/-14.7 years at biopsy. The duration of renal disease was 116.0+/-60.5 months and the duration of follow-up post biopsy was 100.2+/-38.1 months. The pathological diagnosis was: IgA nephropathy (21 cases), focal glomerulosclerosis (9 cases), mesangial proliferative glomerulonephritis (8 cases), membranous glomerulonephritis (2 cases) and acute glomerulonephritis (1 case). RESULTS: At the end of follow-up, 8 cases (19.5%) had a certain degree of renal insufficiency including 2 (4.9%) in end-stage renal disease. The other cases were either in complete remission (6 cases) or stable condition (27 cases) with persistent microscopic hematuria and normal renal function. The long-term outcome was not correlated with any of the following parameters: age, sex, disease duration, serum creatinine at presentation, daily protein loss at presentation, degree of glomerular change and degree of interstitial inflammatory cell infiltration. However, a poor long-term outcome was correlated with tubular atrophy (p < 0.05) and interstitial fibrosis (p < 0.05). CONCLUSION: We conclude that a minimal urinary abnormality with normal renal function at presentation does not necessarily imply a favorable long-term outcome in certain patients. Tubular atrophy and interstitial fibrosis but not glomerular change correlates with a worse prognosis. This further emphasizes the importance of renal biopsy in such cases.


Asunto(s)
Glomerulonefritis/fisiopatología , Hematuria/etiología , Adulto , Creatinina/sangre , Femenino , Glomerulonefritis/patología , Glomerulonefritis/orina , Humanos , Riñón/fisiología , Masculino , Pronóstico , Estudios Retrospectivos
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