RESUMO
Laparoscopic and endoscopic cooperative surgery(LECS)for gastric gastrointestinal stromal tumor(GIST)has become a popular surgery with both curability and functional preservation. In this study, we examined the outcomes of 14 patients who underwent classical LECS or CLEAN-NET in our hospital. Until March 2022, classical LECS was performed in patients with intraluminal growth tumors or tumors close to the gastroesophageal junction. After April 2022, classical LECS was performed in patients with intraluminal growth tumors without ulceration, and CLEAN-NET was performed in patients with ulceration or intramural growth tumors. There were 10 males and 4 females with a median age of 80.5 years. Intraluminal growth tumor were 8 patients, close to the gastroesophageal junction tumor were 3, and intramural growth tumor were 4, respectively. Five of these patients had tumors with ulceration. Classical LECS was performed in 10 patients and CLEAN-NET in 4 patients, and the median operative time was 165.5 minutes. All patients underwent R0 resection, and no postoperative complications or recurrences were observed. LECS was performed safely, and it is important to select the surgical procedure according to the tumor site and growth type.
Assuntos
Tumores do Estroma Gastrointestinal , Laparoscopia , Neoplasias Gástricas , Masculino , Feminino , Humanos , Idoso de 80 Anos ou mais , Tumores do Estroma Gastrointestinal/cirurgia , Tumores do Estroma Gastrointestinal/patologia , Gastroscopia/efeitos adversos , Gastroscopia/métodos , Laparoscopia/efeitos adversos , Neoplasias Gástricas/patologia , Junção Esofagogástrica/patologia , Resultado do TratamentoRESUMO
We report a case of a patient with locally recurrent esophageal cancer after chemoradiation therapy(CRT)who responded to nivolumab. The patient was an 86-year-old man with advanced esophageal cancer. Upper gastrointestinal endoscopy (EGD)revealed a type 2 lesion in the middle thoracic esophagus, and biopsy revealed squamous cell carcinoma(SCC). Contrast- enhanced CT showed invasion of the left main bronchi. The patient was diagnosed as Stage â £a advanced esophageal cancer, and was treated with 5-FU plus cisplatin chemotherapy, and 60 Gy of radiation therapy. The tumor disappeared by CT and EGD, and the patient was followed up for observation. The patient experienced a feeling of tightness again, and EGD revealed an ulcerative lesion in the middle thoracic esophagus, and a biopsy detected SCC. Because of the early recurrence after CRT, the patient was judged to be resistant to 5-FU plus cisplatin chemotherapy, and 8 courses of nivolumab were administered as second-line treatment. Follow-up EGD confirmed disappearance of ulcerative lesions, and no tumors have been observed to date.
Assuntos
Adenocarcinoma , Cisplatino , Neoplasias Esofágicas , Masculino , Humanos , Idoso de 80 Anos ou mais , Nivolumabe/uso terapêutico , Fluoruracila , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Recidiva Local de Neoplasia/tratamento farmacológico , Neoplasias Esofágicas/patologiaRESUMO
A 77-year-old man presented to our hospital with diarrhea and weight loss. Upper gastrointestinal endoscopy revealed advanced Type 3 gastric cancer measuring 40 mm in the lower greater curvature of the stomach. Biopsy from a gastric tumor revealed moderately differentiated tubular adenocarcinoma overexpressing HER2. Abdominal contrast-enhanced computed tomography(CT)showed multiple liver metastases in S3 and S5. We diagnosed HER2-positive gastric cancer with liver metastasis. Systemic chemotherapy was administrated, with a total of 13 courses of combination therapy with S-1, oxaliplatin and trastuzumab. After chemotherapy, the primary tumor was significantly reduced and liver metastases were almost undetectable. Laparoscopic distal gastrectomy and partial hepatectomy were performed as conversion surgery. The patient was discharged on the 9th day without any postoperative complications. Postoperative pathological findings showed no residual tumor in either gastric and hepatic specimens, and the therapeutic effect of chemotherapy was diagnosed as pathological complete response. We report a case of HER2-positive advanced gastric cancer with multiple liver metastases that achieved a pathologically complete response to chemotherapy followed by conversion surgery. Laparoscopic surgery would be one of an effective option for conversion surgery.
Assuntos
Laparoscopia , Neoplasias Hepáticas , Neoplasias Gástricas , Masculino , Humanos , Idoso , Neoplasias Gástricas/tratamento farmacológico , Neoplasias Gástricas/cirurgia , Neoplasias Gástricas/patologia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Gastrectomia , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/cirurgia , Neoplasias Hepáticas/secundário , Resposta Patológica CompletaRESUMO
BACKGROUND: Expression of High-Mobility Group Box 1 (HMGB1), a multifunctional protein involved in DNA function as well as cell proliferation, inflammation, and the immune response, has been reported to be prognostic in several types of malignancies. However, the prognostic value of HMGB1 in ampullary cancer has not been studied. METHODS: Patients with adenocarcinoma of the ampulla of Vater who underwent R0 resection with pancreaticoduodenectomy between 2001 and 2011 were included in the present multi-institutional study. The degree of HMGB1 expression was examined in each resected specimen by immunohistochemical staining. RESULTS: A total of 101 patients were enrolled of which, 79 patients were eligible. High expression of HMGB1 was observed in 31 (39%) patients. Blood loss, transfusion, tumor stage, nodal status, and HMGB1 expression were identified as predictors with univariate analysis. Multivariate analysis showed that transfusion, lymph-node metastasis, and high HMGB1 expression were independent predictors of poor overall survival. Subgroup analysis showed that high HMGB1 expression was predictive, especially in patients who did not receive adjuvant chemotherapy. CONCLUSIONS: High HMGB1 expression is an independent predictor of poor prognosis in patients with adenocarcinoma of the ampulla of Vater not treated with adjuvant chemotherapy.
Assuntos
Adenocarcinoma/mortalidade , Ampola Hepatopancreática/metabolismo , Biomarcadores Tumorais/metabolismo , Neoplasias do Ducto Colédoco/mortalidade , Proteína HMGB1/metabolismo , Pancreaticoduodenectomia/mortalidade , Adenocarcinoma/metabolismo , Adenocarcinoma/patologia , Adenocarcinoma/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Ampola Hepatopancreática/patologia , Ampola Hepatopancreática/cirurgia , Neoplasias do Ducto Colédoco/metabolismo , Neoplasias do Ducto Colédoco/patologia , Neoplasias do Ducto Colédoco/cirurgia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Taxa de SobrevidaRESUMO
A 74-year-old man was admitted to our hospital with multiple liver tumors detected by routine ultrasonography. Colonoscopy showed a type 2 tumor measuring approximately 25mm in diameter at the terminal ileum. The biopsy specimen showed neuroendocrine tumor(NET)G1. The patient was diagnosed with NET G1 of the ileum with multiple liver metastases. Thus, he underwent ileocecal resection with lymph node dissection and liver(S2)biopsy. A tumor was observed at the terminal ileum with serosal invasion, and the mesenteric lymph nodes were enlarged. Multiple liver metastatic tumors were observed in S2, S5, and S8. The patient was diagnosed with NET G1 of the ileum, T4N1M1, Stage â £. He is receiving octreotide therapy and has maintained stable disease for about 24 months.
Assuntos
Neoplasias do Íleo , Neoplasias Hepáticas , Tumores Neuroendócrinos , Idoso , Colectomia , Humanos , Neoplasias do Íleo/patologia , Neoplasias do Íleo/cirurgia , Íleo , Neoplasias Hepáticas/secundário , Excisão de Linfonodo , Masculino , Tumores Neuroendócrinos/secundárioRESUMO
An 84-year-old man visited our hospital with epigastralgia.Levels of hepatic and biliary enzymes and CRP were elevated, as detected by a blood test.On a CT scan, a swollen gallbladder with stones was detected.The patient was admitted to the hospital with a diagnosis of Grade I acute cholecystitis.Conservative treatment was continued with antibiotic administration and the patient was discharged from the hospital with improvement on day 6 after admission.Three months later, the patient underwent laparoscopic cholecystectomy.In the gallbladder, a 45×45 mm tumor was found.Upon pathological examination, diffuse proliferation of lymphocyte-like heterotypic cells and subserosal invasion were observed.Immunohistochemistry results were negative for MUM1 and positive for CD10 and Bcl6 markers.A malignant diffuse large B-cell lymphoma was diagnosed.We experienced a case of malignant lymphoma of the gallbladder diagnosed after surgery for acute cholecystitis, which we herein report with literature consideration.
Assuntos
Colecistite/diagnóstico por imagem , Colecistite/etiologia , Neoplasias da Vesícula Biliar/complicações , Neoplasias da Vesícula Biliar/diagnóstico , Linfoma Difuso de Grandes Células B/complicações , Linfoma Difuso de Grandes Células B/diagnóstico , Idoso de 80 Anos ou mais , Colecistectomia Laparoscópica , Neoplasias da Vesícula Biliar/patologia , Neoplasias da Vesícula Biliar/cirurgia , Humanos , Linfoma Difuso de Grandes Células B/cirurgia , Masculino , Tomografia Computadorizada por Raios XRESUMO
We report the case of a 69-year-old man diagnosed with gastric cancer.The patient underwent distal gastrectomy(D2) and Billroth I reconstruction in March, 2010. Postoperative histopathological examination indicated M, Ant, Type 5, 100×50 mm, pap>por2>sig, T4aN3M0, pStage III C.We performed S-1 therapy as adjuvant chemotherapy.Abdominal CT showed para-aortic lymph node recurrence in February, 2015. Since HER2 protein was overexpressed in primary tumor immunostaining, he was treated with capecitabine plus CDDP plus trastuzumab therapy.After the chemotherapy, CEA levels decreased to the normal range and the enlarged lymph node was remarkably decreased in size in May, 2015.T he patient is alive 24 months after the chemotherapy with no evidence of recurrence.
Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Aorta/patologia , Neoplasias Gástricas/tratamento farmacológico , Idoso , Capecitabina/administração & dosagem , Cisplatino/administração & dosagem , Humanos , Metástase Linfática , Masculino , Receptor ErbB-2/análise , Receptor ErbB-2/biossíntese , Recidiva , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/patologia , Neoplasias Gástricas/cirurgia , Trastuzumab/administração & dosagemRESUMO
PURPOSE: The aim of this study was to evaluate the safety and feasibility of gastrectomy in elderly patients aged over 80 years. PATIENTS AND METHODS: A total of 393 patients who underwent gastrectomy for gastric cancer were assigned to 2 groups: those aged over 80 years(n=48; elderly group)and those less than 80 years(n=345).Clinicopathological features, operative factors, post-operative complications(Clavien-Dindo Grade II or higher), and mortality were retrospectively analyzed. RESULTS: Rates of distal gastrectomy(73% vs 59%, p=0.043)and D1 or D1+dissection(73% vs 58%, p=0.046)were significantly higher in the elderly group.There were no significant differences in post-operative complication rates(23% vs 20.3%, p=0.255)or mortality rates(2.1% vs 0.6%). CONCLUSION: Our results indicate that gastrectomy in elderly patients aged over 80 years may be safe and feasible.
Assuntos
Complicações Pós-Operatórias , Neoplasias Gástricas/cirurgia , Idoso de 80 Anos ou mais , Feminino , Gastrectomia/efeitos adversos , Humanos , Masculino , Estudos Retrospectivos , Fatores de RiscoRESUMO
PURPOSE: The aim of this study is to evaluate complications of gastrectomy for gastric cancer in patients aged over 85 years. PATIENTS AND METHODS: Thirteen patients received curative gastrectomy between April 2007 and March 2008. The surgical complications were evaluated using the Clavien-Dindo classification. RESULTS: There were 11 patients aged 85-89 years and 2 who were over 90 years old. The median body mass index was 18. Nine patients underwent distal gastrectomy and 4 underwent total gastrectomy. The median operation time was 142 minutes and the median blood loss was 148 mL. Complications greater than Grade 2 were observed in 5 patients(38.5%). All complications were Grade 2. No surgical mortality was observed. DISCUSSION: The morbidity rate in elderly patients over 85 years of age may be higher than in patients aged 75 and lower. Our results suggest that gastrectomy for patients aged over 85 years is acceptable.
Assuntos
Gastrectomia/efeitos adversos , Complicações Pós-Operatórias , Neoplasias Gástricas/cirurgia , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Estudos RetrospectivosRESUMO
There is a high rate of leakage after laparoscopic lower anterior resection(Lap-LAR).We examined the safety of Lap-LAR at community hospitals.We investigated 54 patients who underwent Lap-LAR at the 10 hospitals related to the Department of Surgery at Yokohama City University between April 2013 and March 2014.T he median patient age was 67 years, and 32 patients were men.Forty -eight(88%)cases were higher than pathological Grade T3, and 37(69%)patients had undergone D3 lymph node dissection.A diverting stoma(DS)was created in 13(24%)patients.An anus drain was placed in 23 (40%)patients.The clinical anastomotic leakage rate(13%)is comparable with the rate of the DS study(12.9%).The rate of anastomotic leakage was acceptable.Lap -LAR at a community hospital could be safely performed for rectal cancer by making appropriate case choices and implementing preventive measures against anastomotic leakage.
Assuntos
Laparoscopia , Neoplasias Retais/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Hospitais Comunitários , Humanos , Laparoscopia/efeitos adversos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias , Estudos RetrospectivosRESUMO
A 75-year-old man admitted for left lateral abdominal pain was found to have advanced poorly differentiated gastric adenocarcinoma with abdominal para-aortic and Virchow's lymph node metastases, which was diagnosed to be clinical Stage IV (T3N3H0M1[LYM]). As curative surgery was not deemed possible, we started chemotherapy administration using S-1 (120mg/day)administered orally for 3 weeks and cisplatin(CDDP 100mg/body)administered intravenously on day 8. After 6 courses of chemotherapy, a CT scan showed that all lymph nodes metastases had disappeared, resulting in downstaging to clinical Stage II (T3[SE]N0H0P0M0). Thus, we performed total gastrectomy, lymph node dissection(D2), and splenectomy. Histological findings showed no residual tumor cells in any of the lymph nodes. However, cancer cells remained in the primary gastric lesion. The pathological response to chemotherapy was judged to be Grade 2. The patient has been recurrence-free for 5 years after surgery.
Assuntos
Adenocarcinoma/tratamento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Terapia de Salvação , Neoplasias Gástricas/tratamento farmacológico , Adenocarcinoma/cirurgia , Idoso , Cisplatino/administração & dosagem , Combinação de Medicamentos , Humanos , Masculino , Terapia Neoadjuvante , Ácido Oxônico/administração & dosagem , Neoplasias Gástricas/patologia , Neoplasias Gástricas/cirurgia , Tegafur/administração & dosagemRESUMO
We previously reported the promotion of bone regeneration in calvarial defects of both normal and ovariectomy-induced osteoporotic rats, with the use of biodegradable DNA/protamine scaffold. However, the method by which this DNA-containing scaffold promotes bone formation is still not understood. We hypothesize that the salmon DNA, from which this scaffold is derived, has an osteoinductive effect on pre-osteoblasts and osteoblasts. We examined the effects of salmon DNA on osteoblastic differentiation and calcification in MC3T3-E1 cells, mouse osteoblasts, in vitro and bone regeneration in a calvarial defect model of aged mouse in vivo. The salmon DNA fragments (300 bps) upregulated the expression of the osteogenic markers, such as alkaline phosphatase, Runx2, and osterix (Osx) in MC3T3E1 cells compared with incubation with osteogenic induction medium alone. Measurement of phosphate ion concentrations in cultures showed that the DNA scaffold degraded phosphate ions were released to the cell cultures. Interestingly, we found that the inclusion of DNA in osteoblastic cell cultures upregulated the expression of sodium-dependent phosphate (NaPi) cotransporters, SLC20A1 and SLC34A2, in MC3T3-E1 cells in a time dependent manner. Furthermore, the inclusion of DNA in cell cultures increased the transcellular permeability of phosphate. Conversely, the incubation of phosphonoformic acid, an inhibitor of NaPi cotransporters, attenuated the DNA-induced expression and activation of SLC20A1 and SLC34A2 in MC3T3-E1 cells, resulting in suppression of the osteogenic markers. The implantation of a salmon DNA scaffold disk promoted bone regeneration using calvarial defect models in 30-week-old mice. Our results indicate that the phosphate released from salmon DNA upregulated the expression and activation of NaPi cotransporters, resulting in the promotion of bone regeneration.
Assuntos
DNA/genética , Osteoblastos/citologia , Osteogênese/genética , Fraturas Cranianas/terapia , Proteínas Cotransportadoras de Sódio-Fosfato/genética , Alicerces Teciduais , Células 3T3 , Animais , Diferenciação Celular/genética , DNA/administração & dosagem , Implantes de Medicamento/administração & dosagem , Desenho de Equipamento , Análise de Falha de Equipamento , Camundongos , Osteoblastos/fisiologia , Radiografia , Salmão/genética , Fraturas Cranianas/diagnóstico por imagem , Fraturas Cranianas/fisiopatologia , Engenharia Tecidual/instrumentação , Engenharia Tecidual/métodos , Resultado do TratamentoRESUMO
PURPOSE: The bone regenerative healing process is often prolonged, with a high risk of infection particularly in elderly and diseased patients. A reduction in healing process time usually requires mechanical stress devices, chemical cues, or laser/thermal therapies. Although these approaches have been used extensively for the reduction of bone healing time, the exact mechanisms involved in thermal stress-induced bone regeneration remain unclear. METHODS: Photothermal stress (PTS) stimulation was carried out using a novel photothermal device, composed of an alginate gel (AG) including carbon nanotubes (CNT-AGs) and their irradiator with near-infrared (NIR) light. We investigated the effects of optimal hyperthermia on osteogenesis, its signalling pathway in vitro and mineral deposition in tooth-extracted sockets in vivo. RESULTS: The PTS (10 min at 42 °C, every day), triggered by NIR-induced CNT, increased the activity of alkaline phosphatase (ALP) in mouse osteoblast MC3T3-E1 cells in a time-dependent manner compared with the non-thermal stress control. PTS significantly induced the expression of osteogenic-related molecules such as ALP, RUNX2 and Osterix in a time-dependent manner with phosphorylated mitogen-activated protein kinases (MAPK). PTS increased the expression of heat shock factor (HSF) 2, but not HSF1, resulting in activation of heat shock protein 27. PTS significantly up-regulated mineral deposition in tooth-extracted sockets in normal and ovariectomised osteoporotic model mice in vivo. CONCLUSIONS: Our novel CNT-based PTS up-regulated osteogenesis via activation of heat shock-related molecules, resulting in promotion of mineral deposition in enhanced tooth-extracted sockets.
Assuntos
Densidade Óssea , Resposta ao Choque Térmico/fisiologia , Hipertermia Induzida , Luz , Nanotubos de Carbono , Osteogênese , Alginatos , Animais , Linhagem Celular , Proteínas de Ligação a DNA/genética , Feminino , Géis , Ácido Glucurônico , Fatores de Transcrição de Choque Térmico , Proteínas de Choque Térmico/genética , Ácidos Hexurônicos , Hipertermia Induzida/efeitos adversos , Masculino , Camundongos , Proteínas Quinases Ativadas por Mitógeno/metabolismo , Osteoporose/metabolismo , Ovariectomia , RNA Mensageiro/metabolismo , Extração Dentária , Alvéolo Dental/metabolismo , Fatores de Transcrição/genéticaRESUMO
We report 2 cases of signet ring cell carcinoma of the appendix and colon. Case 1: A 61-year-old man was admitted for lower abdominal pain. Colonoscopy revealed an elevated lesion in the orifice of the appendix. Signet ring cell carcinoma was diagnosed on biopsy. The surgical findings showed multiple peritoneal dissemination nodules, while the primary tumor was unresectable owing to extensive invasion into the retroperitoneum. The histopathological findings were signet ring cell carcinoma, T4b (retroperitoneum), NX, P3, Stage â £. Although the patient received 14 courses of treatment with S-1 as postoperative chemotherapy, he died of his illness at 32 postoperative months. Case 2: A 76-year-old man was admitted for abdominal pain. Perforation of the lower gastrointestinal tract was diagnosed on abdominal CT, and an emergency operation was performed. The surgical findings demonstrated a large number of peritoneal dissemination nodules, cecal invasion of a sigmoid tumor, and perforation of the ascending colon. The primary tumor was thought to be unresectable, and the perforated segment was resected. The histopathological findings were signet ring cell carcinoma, T4b (cecum), NX, P3, Stage â £. Although 11 courses of treatment using FOLFIRI+Bev were administered as postoperative chemotherapy, the patient died of his illness at 26 postoperative months.
Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Apêndice/patologia , Carcinoma de Células em Anel de Sinete/tratamento farmacológico , Neoplasias Peritoneais/secundário , Neoplasias do Colo Sigmoide/tratamento farmacológico , Neoplasias do Colo Sigmoide/patologia , Idoso , Carcinoma de Células em Anel de Sinete/cirurgia , Terapia Combinada , Evolução Fatal , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Peritoneais/tratamento farmacológico , Neoplasias do Colo Sigmoide/cirurgiaRESUMO
AIM: To evaluate short-term outcomes of laparoscopy-assisted colectomy (LAC) in elderly patients with colorectal carcinoma. METHODS: A total of 289 colorectal cancer patients underwent LAC between 2008 and 2013. They were divided into an elderly group (<80 years of age, group E), and a younger group (<80 years of age, group Y). The treatment results, including the surgery-related factors, the perioperative course, and the pre- and postoperative complications, were retrospectively analyzed. RESULTS: There were 49 patients in group E, and 240 patients in group Y. There was no significant difference between the 2 groups considering the operative time, blood loss, rate of transfusion, post-operative hospital stay, rate of conversion to open surgery, or rate of complications, except for the number of patients with an ASA classification of greater than Grade 2 and the degree of lymph node dissection. CONCLUSIONS: LAC in elderly patients was found to be relatively safe because it was associated with a reduction in damage to the abdominal wall, and with an early recovery from surgery. These results suggest that the indications of LAC could be expanded for elderly patients.
Assuntos
Neoplasias Colorretais/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Perda Sanguínea Cirúrgica , Colectomia/métodos , Neoplasias Colorretais/patologia , Feminino , Humanos , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Complicações Pós-Operatórias , Estudos Retrospectivos , Resultado do TratamentoRESUMO
In March 2011, trastuzumab was approved for treating human epidermal growth factor receptor 2 (HER2) positive advanced gastric cancer (AGC) in Japan. Therefore, all patients with AGC should be evaluated for HER2 status. In this study, we analyzed the clinicopathological features and current status of treatment in HER2 positive gastric cancer. One hundred 6 gastric cancer patients were examined for HER2 expression in our hospital between March 2011 and August 2014. Sixteen patients (15.1%) were HER2 positive. There was no correlation between HER2 status and age, sex, and location of tumor; however, HER2 positivity was significantly more frequent in patients with intestinal type tumors and had a tendency towards being more frequent in patients with macroscopic types 0, 1 or 2. Trastuzumab was administered to 10 patients with HER2 positive AGC. The total number of doses of trastuzumab was 1 to 44 (median 7.5), and the therapeutic effect of trastuzumab combination chemotherapy was 1 patient with a complete response and 4 with a partial response. Adverse events due to trastuzumab were not observed. The incidence of HER2 over-expression was 15.1%, and trastuzumab combination chemotherapy was relatively safe and effective.
Assuntos
Neoplasias Gástricas/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Invasividade Neoplásica , Receptor ErbB-2/análise , Neoplasias Gástricas/química , Resultado do TratamentoRESUMO
BACKGROUND: Mesenchymal stem cells (MSCs) are a favored cell source for regenerative medicine because of their multilinage potential. However, the conventional monolayer technique used to culture MSCs, inadequately overcomes their low differentiation capacity. Culture of MSCs in multicellular spheroids, more accurately mimics the in-vivo microenvironment; thus, resolving this problem. In this study, we assessed whether the osteoregenerative potential of MSC spheroids is greater than that of monolayer MSCs. RESULTS: MSC spheroids were generated from rat MSCs (rMSCs) using low-binding plates. Real-time reverse transcription-polymerase chain reaction and immunocytochemical analysis indicated that osteogenic properties were accelerated in MSC spheroids compared with monolayer rMSCs when treated with an osteoblast-inducer reagent for 7 days. Moreover, increased calcium deposition was visualized in MSC spheroids using Alizarin red staining. In a rat calvarial defect model, micro-computed tomography and histological assays showed that MSC spheroid-engrafted defects experienced enhanced bone regeneration. CONCLUSIONS: Our in-vitro and in-vivo results reveal that MSCs in the spheroid culture exhibit enhanced osteoregenerative efficiency compared with monolayer MSCs.
Assuntos
Células-Tronco Mesenquimais/citologia , Osteogênese , Esferoides Celulares/citologia , Animais , Regeneração Óssea , Cálcio/metabolismo , Proliferação de Células , Células Cultivadas , Masculino , Células-Tronco Mesenquimais/metabolismo , Ratos , Ratos Endogâmicos F344 , Esferoides Celulares/metabolismoRESUMO
We report a case of perivascular epithelioid cell tumor arising in the rectum of a 55-year-old woman. The tumor was treated by transanal endoscopic microsurgery. After 1 year follow-up, the patient is alive with no radiologic or endoscopic evidence of recurrence. Perivascular epithelioid cell tumor is a rare mesenchymal tumor characterized by co-expression of melanocytic and smooth muscle markers. This rare tumor can arise in various organs, including the falciform ligament, uterus, uterine cervix, liver, kidney, lung, breast, cardiac septum, pancreas, prostate, thigh, and gastrointestinal tract. Perivascular epithelioid cell tumor of the gastrointestinal tract is very rare, with only 23 previously reported cases. We review the literature on perivascular epithelioid cell tumors arising in the gastrointestinal tract.
Assuntos
Neoplasias de Células Epitelioides Perivasculares/patologia , Neoplasias Retais/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Neoplasias de Células Epitelioides Perivasculares/cirurgia , Prognóstico , Neoplasias Retais/cirurgiaRESUMO
We investigated the significance of staging laparoscopy (SL) for clinical Stage III/IVgastric cancer.SL was performed in 60 patients with clinical Stages III/IV gastric cancer.Pre -SL Stages were T3/4a/4b in 3/49/8 patients, N1/2/3 in 14/21/25, M0/ 1 in 38/22, and IIIA/IIIB/IIIC/IV in 16/13/9/22 patients, respectively.After SL, 11 patients were downstaged from T4a to T3, and 3 patients were downstaged from T4b to T4a.Moreover, 14 patients of P0 were identified as P1 or CY1, and 1 patient of H0 was identified as H1 after SL.As a result, post-SL Stages were IIB/IIIA/IIIB/IIIC/IV in 3/17/9/2/29 patients, respectively. In Stage III patients, staging was changed in 17 patients (44.7%) and the treatment strategies were changed in 9 patients (23.7%).In Stage IV cases, none of the patients changed staging and treatment strategies after SL.In conclusion, SL is useful for accurate staging and determining the treatment strategies in Stage III gastric cancer; however, re-evaluation is needed for the indication of SL in Stage IV gastric cancer.
Assuntos
Laparoscopia , Neoplasias Gástricas/patologia , Humanos , Estadiamento de Neoplasias , Prognóstico , Neoplasias Gástricas/terapiaRESUMO
The ACTS-GC trial showed the efficacy of S-1 adjuvant chemotherapy in patients with pathological Stage II/III gastric cancer who had undergone D2 gastrectomy; however, T1 patients were excluded from this trial.In this study, we compared the prognosis of T1N2/3 gastric cancer with the outcomes of ACTS-GC.From 2000 to 2009, out of 480 patients with resected T1 gastric cancer, 27 patients(5.6%) were pN2/3.Six patients received S-1 adjuvant chemotherapy (group S), whereas 21 patients did not(group N).The 3-year overall survival rates of T1N0/1 and T1N2/3 were 91.7% and 71.3%, respectively. Among T1N2/3 gastric cancer patients, the 3-year survival rate and relapse-free survival rate were 100%/100% in group S and 72.7%/71.1% in group N, respectively. The prognosis of group N was poorer than that of the surgery-alone group in Stage II of ACTS-GC.Furthermore, 5 patients (23.8%) of group N had recurrences; the primary sites of recurrences were lymph nodes in 4 cases, and lymph nodes and liver in 1 case.The prognosis of T1N2/3 gastric cancer is poor; we should, therefore, consider evaluating the efficacy of adjuvant chemotherapy in T1N2/3 gastric cancer patients.