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1.
Br J Surg ; 106(9): 1237-1247, 2019 08.
Artículo en Inglés | MEDLINE | ID: mdl-31183866

RESUMEN

BACKGROUND: BRAF mutation is associated with a poor prognosis in patients with metastatic colorectal cancer. For patients with resectable colorectal liver metastases (CRLMs), the prognostic impact of BRAF mutation is unknown and the benefit of surgery debated. This nationwide intergroup (ACHBT, FRENCH, AGEO) study aimed to evaluate the oncological outcome of patients undergoing liver resection for BRAF-mutated CRLMs. METHODS: The study included patients who underwent resection for BRAF-mutated CRLMs in 24 centres between 2012 and 2016. A case-matched comparison was made with 183 patients who underwent resection of CRLMs with wild-type BRAF during the same interval. RESULTS: Sixty-six patients who underwent resection for BRAF-mutated CRLMs in 24 centres were compared with 183 patients with wild-type BRAF. The 1- and 3-year disease-free survival (DFS) rates were 46 and 19 per cent for the BRAF-mutated group, and 55·4 and 27·8 per cent for the group with wild-type BRAF (P = 0·430). In multivariable analysis, BRAF mutation was not associated with worse DFS (hazard ratio 1·16, 95 per cent c.i. 0·72 to 1·85; P = 0·547). The 1- and 3-year overall survival rates after surgery were 94 and 54 per cent respectively among patients with BRAF mutation, and 95·8 and 82·9 per cent in those with wild-type BRAF (P = 0·004). Median survival after disease progression was 23·0 (95 per cent c.i. 11·0 to 35·0) months among patients with mutated BRAF and 44·3 (35·9 to 52·6) months in those with wild-type BRAF (P = 0·050). Multisite disease progression was more common in the BRAF-mutated group (48 versus 29·8 per cent; P = 0·034). CONCLUSION: These results support surgical treatment for resectable BRAF-mutated CRLM, as BRAF mutation by itself does not increase the risk of relapse after resection. BRAF mutation is associated with worse survival in patients whose disease relapses after resection of CRLM, as for non-metastatic colorectal cancer.


Asunto(s)
Neoplasias Colorrectales/genética , Neoplasias Hepáticas/secundario , Recurrencia Local de Neoplasia/genética , Proteínas Proto-Oncogénicas B-raf/genética , Anciano , Estudios de Casos y Controles , Neoplasias Colorrectales/mortalidad , Neoplasias Colorrectales/patología , Neoplasias Colorrectales/cirugía , Supervivencia sin Enfermedad , Femenino , Hepatectomía , Humanos , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/mortalidad , Neoplasias Hepáticas/cirugía , Masculino , Persona de Mediana Edad , Mutación/genética , Análisis de Supervivencia
2.
Br J Surg ; 105(4): 429-438, 2018 03.
Artículo en Inglés | MEDLINE | ID: mdl-29412449

RESUMEN

BACKGROUND: The operative risk of hepatectomy under antiplatelet therapy is unknown. This study sought to assess the outcomes of elective hepatectomy performed with or without aspirin continuation in a well balanced matched cohort. METHODS: Data were retrieved from a multicentre prospective observational study. Aspirin and control groups were compared by non-standardized methods and by propensity score (PS) matching analysis. The main outcome was severe (Dindo-Clavien grade IIIa or more) haemorrhage. Other outcomes analysed were intraoperative transfusion, overall haemorrhage, major morbidity, comprehensive complication index (CCI) score, thromboembolic complications, ischaemic complications and mortality. RESULTS: Before matching, there were 118 patients in the aspirin group and 1685 in the control group. ASA fitness grade, cardiovascular disease, previous history of angina pectoris, angioplasty, diabetes, use of vitamin K antagonists, cirrhosis and type of hepatectomy were significantly different between the groups. After PS matching, 108 patients were included in each group. There were no statistically significant differences between the aspirin and control groups in severe haemorrhage (6·5 versus 5·6 per cent respectively; odds ratio (OR) 1·18, 95 per cent c.i. 0·38 to 3·62), intraoperative transfusion (23·4 versus 23·7 per cent; OR 0·98, 0·51 to 1·87), overall haemorrhage (10·2 versus 12·0 per cent; OR 0·83, 0·35 to 1·94), CCI score (24 versus 28; P = 0·520), major complications (23·1 versus 13·9 per cent; OR 1·82, 0·92 to 3·79) and 90-day mortality (5·6 versus 4·6 per cent; OR 1·21, 0·36 to 4·09). CONCLUSION: This observational study suggested that aspirin continuation is not associated with a higher rate of bleeding-related complications after elective hepatic surgery.


Asunto(s)
Aspirina/efectos adversos , Procedimientos Quirúrgicos Electivos , Hepatectomía , Atención Perioperativa/efectos adversos , Inhibidores de Agregación Plaquetaria/efectos adversos , Hemorragia Posoperatoria/inducido químicamente , Adulto , Anciano , Aspirina/administración & dosificación , Pérdida de Sangre Quirúrgica , Esquema de Medicación , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Evaluación de Resultado en la Atención de Salud , Atención Perioperativa/métodos , Inhibidores de Agregación Plaquetaria/administración & dosificación , Hemorragia Posoperatoria/epidemiología , Estudios Prospectivos
3.
Br J Surg ; 105(7): 839-847, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-28858392

RESUMEN

BACKGROUND: Locoregional extension of intrahepatic cholangiocarcinoma (ICC) at the time of diagnosis results in a low resectability rate and poor prognosis. The aim of this retrospective study was to assess the efficacy of neoadjuvant chemotherapy for locally advanced ICC. METHODS: All consecutive patients with ICC between 2000 and 2013 were included prospectively in a single-centre database and analysed retrospectively. Patients with locally advanced ICC considered as initially unresectable received primary chemotherapy, followed by surgery in those with secondary resectability. Results of patients who underwent surgery for locally advanced ICC were compared with those of patients with initially resectable ICC treated by surgery alone. RESULTS: A total of 186 patients were included in the study. Of 74 patients with locally advanced ICC, 39 (53 per cent) underwent secondary resection after a median of six chemotherapy cycles. Patients in this group were younger (P = 0·030) and had more advanced disease than those who had surgery alone, and presented more frequently with lymphadenopathy (P = 0·010) and vascular invasion (P = 0·010). Postoperative morbidity and mortality were no different between the groups. The median survival of patients who had surgery after chemotherapy was 24·1 months, and that of patients who had surgery alone was 25·7 months (P = 0·391). CONCLUSION: Patients with locally advanced ICC treated by surgery following neoadjuvant chemotherapy had similar short- and long-term results to patients with initially resectable ICC who had surgery alone. Neoadjuvant chemotherapy as a first-line treatment for locally advanced ICC may be an effective downstaging option, facilitating secondary resectability in patients with initially unresectable disease.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de los Conductos Biliares/tratamiento farmacológico , Colangiocarcinoma/tratamiento farmacológico , Terapia Neoadyuvante , Anciano , Neoplasias de los Conductos Biliares/patología , Neoplasias de los Conductos Biliares/cirugía , Quimioterapia Adyuvante , Colangiocarcinoma/patología , Colangiocarcinoma/cirugía , Supervivencia sin Enfermedad , Femenino , Humanos , Análisis de Intención de Tratar , Masculino , Persona de Mediana Edad , Estudios Retrospectivos
4.
Br J Surg ; 102(13): 1684-90, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26392212

RESUMEN

BACKGROUND: Despite the gradual diffusion of laparoscopic liver resection, the feasibility and results of laparoscopic two-stage hepatectomy (TSH) for bilobar colorectal liver metastases (CRLM) have not been described frequently. This study aimed to evaluate the feasibility, safety and oncological outcomes of laparoscopic TSH for bilobar CRLM. METHODS: All patients eligible for laparoscopic TSH among those treated for bilobar CRLM from 2000 to 2013 were included. Demographics, tumour characteristics, surgical procedures, and short- and long-term outcomes were analysed. RESULTS: Laparoscopic TSH was planned in 34 patients with bilobar CRLM, representing 17·2 per cent of all 198 patients treated for bilobar CRLM. Thirty patients received preoperative chemotherapy, and 20 had portal vein occlusion to increase the volume of the remnant liver. Laparoscopic resection of the primary colorectal tumour was integrated within the first-stage hepatectomy in 11 patients. After a median interval of 3·1 months, 26 patients subsequently had a successful laparoscopic second-stage hepatectomy, including 18 laparoscopic right or extended right hepatectomies. The mortality rate for both stages was 3 per cent (1 of 34), and the overall morbidity rate for the first and second stages was 50 per cent (17 of 34) and 54 per cent (14 of 26) respectively. Mean length of hospital stay was 6·1 and 9·0 days respectively. With a median follow-up of 37·8 (range 6-129) months, 3- and 5-year overall survival rates in patients who completed TSH were 78 and 41 per cent respectively. The 3- and 5-year disease-free survival rates were 26 and 13 per cent respectively. CONCLUSION: Laparoscopic TSH for bilobar CRLM is safe and does not jeopardize long-term outcomes in selected patients.


Asunto(s)
Neoplasias Colorrectales/patología , Hepatectomía/métodos , Laparoscopía/métodos , Neoplasias Hepáticas/secundario , Neoplasias Colorrectales/mortalidad , Neoplasias Colorrectales/cirugía , Supervivencia sin Enfermedad , Femenino , Francia/epidemiología , Humanos , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/cirugía , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Tasa de Supervivencia/tendencias , Resultado del Tratamiento
5.
BJS Open ; 3(5): 678-686, 2019 10.
Artículo en Inglés | MEDLINE | ID: mdl-31592094

RESUMEN

Background: It is not known whether perioperative chemotherapy, compared with adjuvant chemotherapy alone, improves disease-free survival (DFS) in patients with upfront resectable colorectal liver metastases (CLM). The aim of this study was to estimate the impact of neoadjuvant 5-fluorouracil, leucovorin and oxaliplatin (FOLFOX) on DFS in patients with upfront resectable CLM. Methods: Consecutive patients who presented with up to five resectable CLM at two Japanese and two French centres in 2008-2015 were included in the study. Both French institutions favoured perioperative FOLFOX, whereas the two Japanese groups systematically preferred upfront surgery plus adjuvant chemotherapy. Inverse probability of treatment weighting (IPTW) and Cox regression multivariable models were used to adjust for confounding. The primary outcome was DFS. Results: Some 300 patients were included: 151 received perioperative chemotherapy and 149 had upfront surgery plus adjuvant chemotherapy. The weighted 3-year DFS rate was 33·5 per cent after perioperative chemotherapy compared with 27·1 per cent after upfront surgery plus adjuvant chemotherapy (hazard ratio (HR) 0·85, 95 per cent c.i. 0·62 to 1·16; P = 0·318). For the subgroup of 165 patients who received adjuvant FOLFOX successfully (for at least 3 months), the adjusted effect of neoadjuvant chemotherapy was not significant (HR 1·19, 0·74 to 1·90; P = 0·476). No significant effect of neoadjuvant chemotherapy was observed in multivariable regression analysis. Conclusion: Compared with adjuvant chemotherapy, perioperative FOLFOX does not improve DFS in patients with resectable CLM, provided adjuvant chemotherapy is given successfully.


Antecedentes: Se desconoce si la quimioterapia perioperatoria en comparación con la quimioterapia adyuvante sola mejora la supervivencia libre de enfermedad (disease­free survival, DFS) en pacientes con metástasis hepáticas de origen colorrectal (colorectal liver metastases, CLM) resecables de inicio. El objetivo de este estudio fue estimar el impacto de la neoadyuvancia con 5­fluorouracilo, leucovorina y oxaliplatino (FOLFOX) sobre la DFS en pacientes con CLM resecables desde el principio. Métodos: Se incluyeron pacientes consecutivos que presentaban hasta cinco CLM resecables en dos centros japoneses y dos centros franceses entre 2008 a 2015. Ambas instituciones francesas favorecían FOLFOX perioperatorio, mientras que los dos grupos japoneses utilizaban sistemáticamente la cirugía de entrada y quimioterapia adyuvante. Se utilizaron la probabilidad inversa del tratamiento ponderado (Inverse Probability of Treatment Weighting, IPTW) y el modelo multivariable de regresión de Cox para ajustar por factores de confusión. El resultado primario fue la DFS. Resultados: Se incluyeron 300 pacientes (grupo de quimioterapia perioperatoria n = 151 y grupo de cirugía de entrada más quimioterapia adyuvante n = 149). La DFS a los 3 años ponderada fue del 33% después de quimioterapia perioperatoria versus 27% tras cirugía de entrada (cociente de riesgos instantáneos, hazard ratio HR: 0,85; i.c. del 95% (0,62­1,16); P = 0,32). Cuando se consideró el subgrupo de pacientes que (n = 165) de manera efectiva (al menos 3 meses) recibieron FOLFOX adyuvante, el efecto ajustado de la quimioterapia neoadyuvante no fue significativo (HR: 1,19 (0,74­1,90); P = 0,48). No se observó un efecto significativo de la quimioterapia neoadyuvante en el análisis de regresión multivariable. Conclusión: En comparación con la quimioterapia adyuvante, el FOLFOX perioperatorio no mejora la DFS en CLM resecables siempre y cuando la quimioterapia adyuvante se administre de forma efectiva.


Asunto(s)
Quimioterapia Adyuvante/tendencias , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/cirugía , Neoplasias Hepáticas/secundario , Periodo Perioperatorio/tendencias , Adulto , Anciano , Anciano de 80 o más Años , Antimetabolitos Antineoplásicos/administración & dosificación , Antimetabolitos Antineoplásicos/uso terapéutico , Antineoplásicos/administración & dosificación , Antineoplásicos/uso terapéutico , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias Colorrectales/patología , Supervivencia sin Enfermedad , Femenino , Fluorouracilo/administración & dosificación , Fluorouracilo/uso terapéutico , Francia/epidemiología , Hepatectomía/métodos , Humanos , Japón/epidemiología , Leucovorina/administración & dosificación , Leucovorina/uso terapéutico , Neoplasias Hepáticas/tratamiento farmacológico , Neoplasias Hepáticas/cirugía , Masculino , Persona de Mediana Edad , Terapia Neoadyuvante/métodos , Compuestos Organoplatinos/administración & dosificación , Compuestos Organoplatinos/uso terapéutico , Oxaliplatino/administración & dosificación , Oxaliplatino/uso terapéutico , Estudios Retrospectivos , Complejo Vitamínico B/administración & dosificación , Complejo Vitamínico B/uso terapéutico
6.
Transplant Proc ; 40(6): 1972-3, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18675103

RESUMEN

We retrospectively evaluated the impact of our strategy for patients with hepatocellular carcinoma (HCC) according to an intention-to-treat analysis and drop-out probability. We evaluated only patients within the Milan criteria. We analyzed the outcomes of neoadjuvant strategies for HCC, organ allocation policy, and systematic application of strategies to increase the deceased donor pool as the current tendency to expand transplantability criteria for those patients. Kaplan-Meier survival probability rates at 1, 3, and 5 years according to an intention-to-treat analysis were 87.02%, 74.53%, and 65.93% for transplanted patients (n=108), and 50%, 14.29%, and 14.29% for the excluded or waiting list group (n=13), respectively (P< .0001). Drop-out risk at 3, 6, and 12 months was 2.40%, 8.59%, and 16.54%, respectively. During the same period, the mortality probability rates at 3, 6, and 12 months among patients without HCC awaiting orthotopic liver transplantation (OLT) were 3.60%, 9.50%, and 18.34%, respectively. Drop-out rate was lower among patients treated before OLT (P< .0001). On the basis of the neoadjuvant treatment results to reduce drop-out risk, we suggest avoiding the high priority for the HCC cohort, particularly within the first 6 months from entrance on the waiting list, because this approach can reduce the chances of patients with end-stage liver disease (ESLD) alone.


Asunto(s)
Carcinoma Hepatocelular/cirugía , Neoplasias Hepáticas/cirugía , Trasplante de Hígado/estadística & datos numéricos , Asignación de Recursos , Carcinoma Hepatocelular/mortalidad , Carcinoma Hepatocelular/patología , Quimioembolización Terapéutica , Política de Salud , Humanos , Neoplasias Hepáticas/mortalidad , Neoplasias Hepáticas/patología , Trasplante de Hígado/mortalidad , Metástasis de la Neoplasia , Selección de Paciente , Estudios Retrospectivos , Análisis de Supervivencia , Listas de Espera
7.
Int J Pharm ; 531(1): 143-152, 2017 Oct 05.
Artículo en Inglés | MEDLINE | ID: mdl-28803938

RESUMEN

BACKGROUND: Peritoneal metastases (PM), corresponding to tumor implants into the peritoneal cavity, are associated with impaired prognosis and low responsiveness to systemic chemotherapy. A new therapeutic approach has dramatically changed the prognosis of patients with PM from colorectal cancer (CRC), consisting in the association of a complete cytoreductive surgery followed by intraperitoneal chemotherapy associated to hyperthermia (HIPEC). Many drugs have been administered intraperitoneally, but no clear consensus has been approved. Therefore, relevant preclinical models are essentials for the efficient translation of treatments option into affected patients. METHOD: Organoids, the last generation of preclinical models, were used to rationalize and improve intraperitoneal chemotherapy. We tested several cytotoxics, combination, effect of hyperthermia, exposure duration and frequency. RESULTS: Organoids were a representative model of response to chemotherapies used for the treatment of PM from CRC; 460mg/m2 of oxaliplatin being the most efficient cytotoxic treatment. Repeated incubations with oxaliplatin; mimicking cycles of intraperitoneal treatment, resulted in an increased efficacy. CONCLUSION & DISCUSSION: Organoids are relevant models to study the chemosensitivity of peritoneal metastases from CRCs. These models could be used for large scale drug screening strategies or personalized medicine, for colorectal carcinoma but also for PM from other origins.


Asunto(s)
Neoplasias Colorrectales/terapia , Organoides/efectos de los fármacos , Neoplasias Peritoneales/terapia , Protocolos de Quimioterapia Combinada Antineoplásica , Neoplasias Colorrectales/patología , Terapia Combinada , Humanos , Hipertermia Inducida , Neoplasias Peritoneales/secundario
8.
J Visc Surg ; 152(3): 161-6, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-26025414

RESUMEN

Portal biliopathy (PB) refers to the biliary abnormalities of the biliary ducts observed in patients with extrahepatic portal hypertension. Although majority of patients are asymptomatic, approximately 20% of these patients present with biliary symptoms (pain, pruritus, jaundice, cholangitis). The pathogenesis of PB is uncertain but compression by dilated veins into or around common bile duct may play the main role. CT-scan, MR cholangiopancreatography with MR portography should be the initial investigations in the evaluation of PB. Treatment is limited to symptomatic cases and is dictated by clinical manifestations and complications of the disease. Treatment of PB could be done by endoscopy (sphincterotomy, stone extraction or biliary stenting of the common bile duct) or surgery (definitive decompression by porto-systemic shunt followed by bilioenteric anastomosis, if necessary). This review describes pathogenesis, clinical features, investigation and management of portal biliopathy.


Asunto(s)
Enfermedades de los Conductos Biliares/etiología , Hipertensión Portal/complicaciones , Enfermedades de los Conductos Biliares/diagnóstico , Enfermedades de los Conductos Biliares/terapia , Colangiopancreatografia Retrógrada Endoscópica , Pancreatocolangiografía por Resonancia Magnética , Drenaje/instrumentación , Drenaje/métodos , Humanos , Derivación Portosistémica Quirúrgica , Esfinterotomía Endoscópica , Stents , Tomografía Computarizada por Rayos X
9.
Hum Pathol ; 20(8): 787-95, 1989 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-2744751

RESUMEN

The histologic, histochemical, immunohistochemical, and ultrastructural features of Brenner tumor (BT) were studied. BT was compared with transitional bladder cells, and close similarities between the two tissues were identified. Abundant glycogen in all cellular layers, an alcianophilic/sialomucinic surface mucous coat, and argyrophilic cells characterized both BT and bladder epithelium. Immunohistochemically, chromogranin and neuron-specific enolase reactivity was observed in all cases examined. An additional relevant finding was the presence of serotonin-storing cells in both BT and urothelium. Moreover, carcinoembryonic antigen, epithelial membrane antigen, and keratin reaction were found in BT and urothelium, indicating an additional antigenic similarity. Additionally, malignant Brenner tumor was ultrastructurally found to share many common features with the bladder tissue. The distinct histochemical, ultrastructural, and antigenic pattern of BT, primarily of the transitional type, is emphasized.


Asunto(s)
Tumor de Brenner/patología , Neoplasias Ováricas/patología , Tumor de Brenner/análisis , Tumor de Brenner/ultraestructura , Antígeno Carcinoembrionario/análisis , Femenino , Humanos , Inmunohistoquímica , Microscopía Electrónica , Neoplasias Ováricas/análisis , Neoplasias Ováricas/ultraestructura
10.
APMIS ; 100(7): 575-85, 1992 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-1642844

RESUMEN

The distribution of lysozyme in normal and pathological human gastric and colonic mucosa was studied by light and electron microscopic immunocytochemical techniques and compared with histological and histochemical features. Lysozyme was localized in pyloric glandular epithelial cells, mucous neck cells of fundic glands, Paneth cells and some crypt cells of the mature colonic mucosa. In addition, lysozyme was detected in a large spectrum of "immature" or "regenerative" epithelium: neck cells of the gastric regenerative zone, undifferentiated columnar cells of surface and hyperplastic interfoveolar crests of the stomach, regenerative cells in a healed gastric ulcer, some goblet cells in incomplete intestinal metaplasia, cells of the regenerative zone at the bottom of colonic crypts and, finally, fetal intestinal epithelium. Electron microscopically, we localized lysozyme in the central core of mucous granules in the pyloric gastric glandular epithelium and in the dense mucous granules in gastric mucous neck cells. Lysozyme was also detected in some immature mucin-producing cells of the gastric regenerative zone and in the rough endoplasmic reticulum of surface hyperplastic columnar gastric cells. At the electron microscopic level, a peculiar correlation between the immunopattern of lysozyme and the morphology of mucous granules has been postulated. All our data support and extend the view that the presence of lysozyme may be related to cell immaturity as well as to a regenerative state of the cell. Finally, the lysozyme distribution and its relation to mucosubstances in gastric and colonic carcinoma suggest that lysozyme should not be considered an exclusive marker of cells of gastric derivation.


Asunto(s)
Adenocarcinoma/enzimología , Mucosa Gástrica/enzimología , Neoplasias Gastrointestinales/enzimología , Mucosa Intestinal/enzimología , Muramidasa/análisis , Adenocarcinoma/patología , Adenocarcinoma/ultraestructura , Feto/enzimología , Mucosa Gástrica/patología , Mucosa Gástrica/ultraestructura , Neoplasias Gastrointestinales/patología , Neoplasias Gastrointestinales/ultraestructura , Humanos , Inmunohistoquímica , Mucosa Intestinal/patología , Mucosa Intestinal/ultraestructura , Microscopía Inmunoelectrónica
11.
Anticancer Res ; 13(5C): 1821-4, 1993.
Artículo en Inglés | MEDLINE | ID: mdl-7903522

RESUMEN

The protein encoded by erbB2 oncogene was evaluated by three different methodological approaches (Western blotting, ELISA and immunohistochemistry) in 147 breast cancer specimens. A highly significant correlation was found between Western blotting and ELISA results (p < 0.001). The data from ELISA and Western blotting were categorized as negatives (-), low-overexpressing (+) and high-overexpressing (++). Immunohistochemical results were classified as (-) or (+) according to the absence or the presence of specific staining. Overall positive cases (+ and ++) were 42.2% by Western blotting and 51% by ELISA, while (++) cases were 23.8% and 25.2% respectively. Histochemical staining was found in 29.8% of cases. The two by two evaluation of the assays showed a close association (chi2, p < 0.0001). In particular, the comparison between both ELISA and Western blotting with immunohistochemistry showed concordance rates of 78.9% for ELISA and 83.1% for Western blotting considering the + and ++ cases as a single group. When only the ++ cases were considered as positive, the overall agreement rises to 93.3% and 89.1% respectively. From these preliminary data we conclude that p185 values obtained with the three evaluated methods are possibly superimposable. Nevertheless, the biochemical methods seem to identify an intermediate p185 expression group, whose clinical meaning should be investigated.


Asunto(s)
Neoplasias de la Mama/diagnóstico , Receptores ErbB/análisis , Proteínas Proto-Oncogénicas/análisis , Biomarcadores de Tumor/metabolismo , Western Blotting/métodos , Ensayo de Inmunoadsorción Enzimática/métodos , Humanos , Inmunohistoquímica/métodos , Receptor ErbB-2
12.
Int J Biol Markers ; 2(2): 83-6, 1987.
Artículo en Inglés | MEDLINE | ID: mdl-2454275

RESUMEN

The distribution of intermediate-filament (IF) proteins of the keratin, vimentin and desmin type in breast stromal sarcomas, carcinosarcomas, metaplastic carcinomas and phyllodes tumors has been compared using the avidin-biotin complex immunoperoxidase technique. Keratin reactivity was found in carcinomatous and pseudosarcomatous areas of all metaplastic carcinomas, in the cuboidal epithelial cells of carcinosarcomas and in the epithelial component of phyllodes tumors. Vimentin and desmin were detected in the sarcomatous portion of carcinosarcoma, focally in the stromal component of phyllodes tumors and not always in the stromal sarcomas. These data confirm that combined analysis of IF expression is a reliable and convincing way to differentiate stromal sarcomas, metaplastic carcinomas and carcinosarcomas in breast pathology.


Asunto(s)
Neoplasias de la Mama/patología , Desmina/análisis , Queratinas/análisis , Vimentina/análisis , Carcinoma/patología , Carcinosarcoma/patología , Femenino , Humanos , Técnicas para Inmunoenzimas , Sarcoma/patología
13.
Am J Surg ; 158(5): 399-403, 1989 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-2817219

RESUMEN

The neoplastic involvement of the nipple-areolar complex was histologically studied in 1,291 available consecutive mastectomy specimens with primary invasive breast carcinoma. Tumor involvement of the nipple-areolar complex was found in 150 specimens (12 percent) and was not suspected on gross examination in 99 patients (8 percent). A significant finding of our study was the relatively high rate of tumor foci in the nipple-areolar complex (7 percent) in those patients with early invasive stage I or II breast carcinoma eligible for conservative therapy. Analysis of nipple-areolar complex involvement with consideration of different clinico-morphologic variables indicates that it was directly associated with tumor size. No significant correlation was found with axillary metastases, tumor histologic type, or with the presence of noninvasive cancer in the vicinity of the dominant tumor. Our estimate of the significant change of finding tumor in the nipple-areolar complex, especially in the patient group eligible for conservative therapy, underlines the need for postoperative radiation.


Asunto(s)
Neoplasias de la Mama/patología , Mama/patología , Carcinoma/patología , Pezones/patología , Adulto , Anciano , Anciano de 80 o más Años , Humanos , Persona de Mediana Edad
14.
Pathol Res Pract ; 198(1): 51-4, 2002.
Artículo en Inglés | MEDLINE | ID: mdl-11866211

RESUMEN

We report a case of an intranodal schwannoma in a 79-year-old woman. The patient underwent a left colectomy for a colonic adenocarcinoma, with regional lymph node dissection. Macroscopic examination of the specimen revealed a well-circumscribed 4 cm nodule located in the pericolic fat. Macroscopically, it was interpreted as a metastatic lymph node. Microscopically, the nodule was composed of a proliferation of bland spindle cells, was immunohistochemically positive for S100 protein, and negative for smooth muscle actin, desmin, and cytokeratin. The pathological findings led to the diagnosis of a very rare case of primary schwannoma of the lymph node.


Asunto(s)
Ganglios Linfáticos/patología , Neurilemoma/patología , Abdomen , Adenocarcinoma/patología , Anciano , Biomarcadores de Tumor/análisis , Neoplasias del Colon/patología , Diagnóstico Diferencial , Femenino , Humanos , Inmunohistoquímica , Escisión del Ganglio Linfático , Ganglios Linfáticos/química , Neoplasias Primarias Múltiples , Neurilemoma/química
15.
Tumori ; 82(3): 270-2, 1996.
Artículo en Inglés | MEDLINE | ID: mdl-8693611

RESUMEN

AIMS AND BACKGROUND: Post-irradiation sarcoma (PIS) a rare, late side effect of radiotherapy and, consequently, its natural history is not well known. For this reason, two cases treated between 1975 and 1990 are described. CASE REPORTS: The Authors describe one case of malignant fibrous histiocytoma grown in the larynx 111 months after conservative surgery and postoperative radiotherapy, and one case of soft tissue sarcoma developed in the oral cavity 72 months after radical interstitial low dose rate brachytherapy. Both patients had chronic distress of the soft tissues after the primary treatment. The patients are alive and well respectively at 94 and 18 months from salvage surgery. DISCUSSION: The PIS of the head and neck region is a rare event, usually with a bad prognosis. An improvement in results could be possible with early diagnosis, followed by a timely excision, when anatomically possible. As the chronic suffering of the irradiated tissues may increase the risk of PIS, a longer and more frequent follow-up is advisable in these cases.


Asunto(s)
Neoplasias de Cabeza y Cuello/etiología , Neoplasias Inducidas por Radiación/etiología , Radioterapia/efectos adversos , Sarcoma/etiología , Adulto , Humanos , Persona de Mediana Edad
16.
J Submicrosc Cytol Pathol ; 27(2): 251-7, 1995 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-7757951

RESUMEN

The histology, immunohistochemistry and ultrastructure of six gastro-intestinal stromal tumors of the stomach (GSTs) showing a focal to diffuse clear cell component are reported. At light microscopy, all GSTs had typical histopathological features with one case additionally displaying stromal myxoid changes and scattered multinucleated giant cells. Immunohistochemically, 6 of 6 GSTs stained positive for vimentin, 2 of 6 for smooth muscle specific actin and 1 of 6 for desmin. At electron microscopy, GSTs showed microfilaments with focal densities as well as other smooth muscle features, such as subplasmalemmal linear densities and foci of external lamina. Ultrastructural appearances of tumor cells with clear cell features showed these not to be an artifact of fixation, but the expression of an unusual cytophagocytic activity. Inclusions of auto- and heterophagocytic nature were found responsible for the origin of the large, mostly lipidic vacuoles which displaced cell nuclei peripherally in a signet-ring fashion. It is concluded that such previously unrecognized features are ultrastructural aspects of GSTs with smooth muscle differentiation.


Asunto(s)
Citoplasma/ultraestructura , Neoplasias Gastrointestinales/ultraestructura , Cuerpos de Inclusión/ultraestructura , Neoplasias de Tejido Muscular/ultraestructura , Neoplasias de Tejido Nervioso/ultraestructura , Adulto , Anciano , Femenino , Neoplasias Gastrointestinales/química , Humanos , Masculino , Persona de Mediana Edad , Neoplasias de Tejido Muscular/química , Neoplasias de Tejido Nervioso/química , Fosfopiruvato Hidratasa/análisis , Proteínas S100/análisis , Células del Estroma/ultraestructura
18.
Transplant Proc ; 42(4): 1061-5, 2010 May.
Artículo en Inglés | MEDLINE | ID: mdl-20534224

RESUMEN

After hepatic resection and transplantation with a partial graft, death and regeneration of the hepatocytes coexist in the liver. However, when the functional liver mass is inadequate to ensure a proper balance between regeneration vs functional and metabolic demands, small-for-size syndrome develops. We assessed the early effects of extended hepatic resection on liver function in a rat model. Six male Sprague-Dawley rats underwent 80% resection of the liver, and 6 rats served as a control group. At 6 hours after resection, blood samples were obtained from the hepatic vein for measurement of reduced glutathione (GSH), oxidized glutathione (GSSG), and hepatic venous oxygen saturation (Shvo(2)), and for standard liver function tests including determination of concentrations of alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transpeptidase, and total bilirubin. The remnant lobe was removed for GSH assay and histopathologic analysis. In the resection group, values were significantly higher for ALT (P = .002), AST (P = .002), and Shvo(2) (P = .01), whereas a significant decrease was observed for blood GSH (P = .009) but not liver GSH. Also in the resection group, we observed characteristic hepatocyte vacuolization with a gradient from periportal acinar zone 1 to the centrolobular area, the presence of hemorrhagic necrosis, and several leukocyte adhesions. The Shvo(2) and GSH data suggest early alteration of oxygen metabolism, as demonstrated by the reduction in oxygen uptake and decreased liver GSH secretion, with preservation of hepatic GSH. Mitochondrial dysfunction and oxidative injury seem to have a crucial role in early onset of liver damage.


Asunto(s)
Regeneración Hepática/fisiología , Trasplante de Hígado/fisiología , Alanina Transaminasa/sangre , Animales , Anticonvulsivantes/farmacología , Aspartato Aminotransferasas/sangre , Moduladores del GABA/farmacología , Hepatectomía , Hepatocitos/citología , Hepatocitos/fisiología , Hígado/anatomía & histología , Hígado/fisiología , Pruebas de Función Hepática , Masculino , Mitocondrias Hepáticas/patología , Mitocondrias Hepáticas/fisiología , Tamaño de los Órganos , Sistema Porta/fisiología , Ratas , Ratas Sprague-Dawley , Tiletamina/farmacología , Vena Cava Inferior/cirugía , Zolazepam/farmacología
20.
Transplant Proc ; 41(4): 1253-5, 2009 May.
Artículo en Inglés | MEDLINE | ID: mdl-19460531

RESUMEN

Patients diagnosed with acute alcoholic hepatitis (AAH) are routinely managed medically and not considered suitable for orthotopic liver transplantation (OLT). The eligibility for OLT in these patients has been questioned due to the social stigma associated with alcohol abuse, based on the fact that AAH is "self-induced" with an unacceptably high recidivism rate. Many centers in Europe and the United States require abstinence periods between 6 and 12 months before OLT listing. AAH outcomes in the literature are poor, in particular due to patient noncompliance during the immediate 3 months preceeding OLT. Between January 1997 and December 2007, 246 patients were evaluated in our center for alcoholic liver disease: 133 (54%) were listed for OLT (I-OLT), including 110 (83%) who underwent transplantation and 8 (6%) still listed as well as 15 (11%) removed from consideration. One hundred thirteen (46%) patients had no indication for OLT (NO I-OLT), including 18 (16%) who died, 81 (71%) still monitored, and 14 (12%) lost to follow-up. Patient survival rates post-OLT were 79%, 74%, 68%, and 64% at 1, 3, 5, and 10 years, respectively. Explant (native liver) pathologic examination revealed AAH in 8 (7.2%) patients who underwent OLT. In this group, patient survival and the post-OLT recidivism rate were statistically identical to the overall group of transplant recipients.


Asunto(s)
Etanol/efectos adversos , Cirrosis Hepática Alcohólica/cirugía , Trasplante de Hígado , Síndrome de Abstinencia a Sustancias , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Tasa de Supervivencia
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