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1.
Gan To Kagaku Ryoho ; 48(13): 1801-1803, 2021 Dec.
Artículo en Japonés | MEDLINE | ID: mdl-35046335

RESUMEN

An 89-year-old woman presented to our clinic with a complaint of a wound in the left nipple. The pathological diagnosis via skin biopsy revealed adenocarcinoma. A physical examination, mammography, ultrasonography, and CT scan revealed a mass in the left nipple. However, a definite diagnosis could not be established by skin biopsy. Left breast-conserving surgery and sentinel lymph node biopsy were performed for diagnosis and treatment. Histological examination revealed a scirrhous type invasive ductal carcinoma in the left nipple and areola with skin invasion and lymph node metastasis. Radiation and hormone therapy were used as adjuvant therapy. She is alive with no local recurrence for 5 months post surgery. Since ductal carcinoma of the nipple is uncommon, we present this case report along with a review of the relevant literature.


Asunto(s)
Neoplasias de la Mama , Carcinoma Ductal de Mama , Anciano de 80 o más Años , Neoplasias de la Mama/cirugía , Carcinoma Ductal de Mama/cirugía , Femenino , Humanos , Mamografía , Pezones/cirugía , Biopsia del Ganglio Linfático Centinela
2.
Surg Today ; 50(10): 1308-1313, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32350622

RESUMEN

Indocyanine green (ICG) fluorescence has been used effectively in imaging for locating hepatic tumors and evaluating hepatic segmentation. We report our initial experience of performing hepatic resection using the novel cart-based ICG fluorescence device LIGHTVISION®. This device has several promising features, including the fact that there is no need to switch off the room light, it has hands-free operability, and it can be located away from the workspace to facilitate a good field of vision. We used the LIGHTVISION® for 15 patients and detected 59 nodules (86.8%) in a total of 68 tumors in the resected specimens during surgery. The LIGHTVISION® was used to identify the hepatic segments in ten patients, and the boundaries of the segment were clearly visualized on the liver surface on fluorescent images in all patients. All tumors were resected with surgical margins. Thus, the LIGHTVISION® appears to be very useful for navigation in liver surgery.


Asunto(s)
Hepatectomía/instrumentación , Verde de Indocianina , Neoplasias Hepáticas/diagnóstico por imagen , Neoplasias Hepáticas/cirugía , Hígado/diagnóstico por imagen , Hígado/cirugía , Imagen Óptica/instrumentación , Cirugía Asistida por Computador/instrumentación , Anciano , Anciano de 80 o más Años , Femenino , Hepatectomía/métodos , Humanos , Hígado/patología , Neoplasias Hepáticas/patología , Masculino , Márgenes de Escisión , Persona de Mediana Edad , Resultado del Tratamiento
3.
Gan To Kagaku Ryoho ; 46(11): 1779-1781, 2019 Nov.
Artículo en Japonés | MEDLINE | ID: mdl-31748492

RESUMEN

An 83-year-old woman visited our hospital with a mass on her right breast mass. Breast ultrasonography revealed a tumorous lesion approximately 30mm in diameter in the right E region. Fibrous tumor was suspected from core needle biopsy. Since surgery for definite diagnosis was not desired, she was followed. Seven months after the first visit, skin redness, pain, and rapid increase in tumor size was consciously recognized, which prompted a reconsultation. The tumor diameter rapidly increased to 74 mm, and a total right mastectomy was performed as a semi-emergency procedure. Necrotic and hemorrhagic lesions were mixed in a mottled state in the cleaved surface of the excised specimen, and the pathological diagnosis was stromal sarcoma mainly comprising of fibrosarcoma components. Stromal sarcoma of the breast lacks the epithelial component of a malignant phyllodes tumor, and effective systemic therapy has not been established; therefore, cases with local recurrence or distant metastasis result in poor prognosis. Since we encountered a case of stromal sarcoma of the breast that showed a rapid increase after several months, we will provide a report with some literature consideration.


Asunto(s)
Neoplasias de la Mama , Tumor Filoide , Anciano de 80 o más Años , Neoplasias de la Mama/cirugía , Femenino , Humanos , Mastectomía , Recurrencia Local de Neoplasia , Tumor Filoide/cirugía
4.
Surg Today ; 48(1): 58-65, 2018 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-28597350

RESUMEN

PURPOSE: To evaluate the short- and long-term outcomes of the Frey procedure for chronic pancreatitis (CP). METHODS: The subjects of this study were 12 patients who underwent the Frey procedure for CP between January, 2000 and December, 2016. We assessed pain relief, weight gain, and exocrine/endocrine insufficiency during follow-up. RESULTS: The study population comprised 11 men and 1 woman (91.7% vs. 8.3%; mean age, 50.3 ± 6.8 years; range 39-61 years). Pancreatitis was caused by alcohol in 9 (75%) patients and was idiopathic in 3 (25%) patients. The mean follow-up period was 82.5 ± 46.5 months (range 16.9-152.1 months). There was no operative mortality, but three patients (25%) suffered postoperative morbidity. All patients were pain-free at the time of discharge. There was no case of new-onset diabetes mellitus after surgery, although one patient (8.3%) suffered exocrine insufficiency. The body weight and body mass index of all patients improved during follow-up. Only one patient continued to suffer pain in the long term. CONCLUSION: The findings of this long-term follow-up of patients who underwent the Frey procedure suggest that it offers effective pain relief and is a safe technique for the management of CP.


Asunto(s)
Pancreatectomía/métodos , Pancreatoyeyunostomía/métodos , Pancreatitis Crónica/cirugía , Adulto , Índice de Masa Corporal , Femenino , Estudios de Seguimiento , Humanos , Japón , Masculino , Persona de Mediana Edad , Pancreatitis Crónica/diagnóstico por imagen , Estudios Retrospectivos , Factores de Tiempo , Resultado del Tratamiento
5.
Surg Endosc ; 31(8): 3398-3404, 2017 08.
Artículo en Inglés | MEDLINE | ID: mdl-27924391

RESUMEN

BACKGROUND: Wedge resection is the most commonly used method in laparoscopic partial gastrectomy for gastric gastrointestinal stromal tumor (GIST). However, this method can involve inadvertent resection of additional gastric tissue and cause gastric deformation. To minimize the volume of resected gastric tissue, we have developed a laparoscopic partial gastrectomy with seromyotomy which we call the 'lift-and-cut method' for gastric GIST. Here, we report a case series of this surgery. METHOD: First, the seromuscular layer around the tumor is cut. Because the mucosa and submucosa are extensible, the tumor is lifted toward the abdominal cavity. After sufficient lifting, the gastric tissue under the tumor is cut at the submucosal layer with a linear stapler (thus 'lift-and-cut method'). Finally, the defect in the seromuscular layer is closed with a hand-sewn suture. RESULTS: From April 2011 to December 2015, 28 patients underwent laparoscopic partial gastrectomy by this method at Osaka Red Cross Hospital. Average operation time was 126 min (range 65-302 min) and average blood loss was 10 ml (range 0-200 ml). No intraoperative complications including tumor rupture or postoperative complications regarded as Clavien-Dindo Grade II or higher occurred. All patients took sufficient solid diet at discharge. Median postoperative hospital stay was 7 days (range 5-21 days). On median follow-up of 26.6 months (range 6-54 months), no recurrence was reported. CONCLUSION: Laparoscopic partial gastrectomy by the lift-and-cut method is safe and simple, and widely applicable for gastric GIST.


Asunto(s)
Gastrectomía/métodos , Muñón Gástrico , Tumores del Estroma Gastrointestinal/cirugía , Laparoscopía/métodos , Recurrencia Local de Neoplasia/cirugía , Neoplasias Gástricas/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Resultado del Tratamiento
6.
J Hepatol ; 63(4): 905-16, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26022691

RESUMEN

BACKGROUND & AIMS: Splenectomy in cirrhotic patients has been reported to improve liver function; however the underlying mechanism remains obscure. In the present study, we investigated the mechanism using a murine model, which represents well the compensated liver cirrhosis. METHODS: C57BL/6 male mice were allowed to drink water including thioacetamide (TAA: 300 mg/L) ad libitum for 32 weeks. After splenectomy at 32 weeks, mice were sacrificed on days one, seven, and 28, respectively, while TAA-administration was continued. Perioperative changes in peripheral blood and liver tissues were analyzed. RESULTS: TAA treatment of mice for 32 weeks reproducibly achieved advanced liver fibrosis with splenomegaly, thrombocytopenia, and leukocytopenia. After splenectomy, liver fibrosis was attenuated, and macrophages/monocytes were significantly increased in peripheral blood, as well as in the liver. Progenitor-like cells expressing CK-19, EpCAM, or CD-133 appeared in the liver after TAA treatment, and gradually disappeared after splenectomy. Macrophages/monocytes accumulated in the liver, most of which were negative for Ly-6C, were adjacent to the hepatic progenitor-like cells, and quantitative RT-PCR indicated increased canonical Wnt and decreased Notch signals. As a result, a significant amount of ß-catenin accumulated in the progenitor-like cells. Moreover, relatively small Ki67-positive hepatic cells were significantly increased. Protein expression of MMP-9, to which Ly-6G-positive neutrophils contributed, was also increased in the liver after splenectomy. CONCLUSIONS: The hepatic accumulation of macrophages/monocytes, most of which are Ly-6C(lo), the reduction of fibrosis, and the gradual disappearance of hepatic progenitor-like cells possibly play significant roles in the tissue remodeling process in cirrhotic livers after splenectomy.


Asunto(s)
Antígenos Ly/metabolismo , Hiperesplenismo/complicaciones , Cirrosis Hepática/cirugía , Hígado/metabolismo , Macrófagos/metabolismo , Esplenectomía , Animales , Modelos Animales de Enfermedad , Citometría de Flujo , Regulación de la Expresión Génica , Hepatocitos/metabolismo , Hepatocitos/patología , Hiperesplenismo/metabolismo , Hiperesplenismo/cirugía , Inmunohistoquímica , Hígado/patología , Cirrosis Hepática/etiología , Cirrosis Hepática/genética , Masculino , Metaloproteinasa 9 de la Matriz/biosíntesis , Metaloproteinasa 9 de la Matriz/genética , Ratones , Ratones Endogámicos C57BL , ARN/genética , Reacción en Cadena en Tiempo Real de la Polimerasa , Proteínas Wnt/biosíntesis , Proteínas Wnt/genética
7.
Surg Today ; 45(4): 506-10, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24522893

RESUMEN

A 70-year-old male was treated for gastric ulcers. Follow-up upper gastrointestinal endoscopy revealed an irregular, elevated tumor in the second portion of the duodenum. Upon pathological inspection of a biopsy specimen, a diagnosis of adenocarcinoma was made, and the patient was admitted to our hospital. Computed tomography showed an irregular mass in the pancreatic head and dilatation of the main pancreatic duct and bile duct. Pancreatic head carcinoma with infiltration of the duodenum was diagnosed, and pylorus-preserving pancreaticoduodenectomy was performed. A histopathological examination of the resected specimen showed moderately differentiated adenocarcinoma in the minor duodenal papilla and chronic pancreatitis in the pancreatic head. Therefore, primary adenocarcinoma of the minor duodenal papilla with mass-forming chronic pancreatitis was diagnosed. Currently, the patient is alive without recurrence 17 months after the surgery. Primary adenocarcinoma of the minor duodenal papilla is extremely rare. We herein report this case, and also provide a review of the literature.


Asunto(s)
Adenocarcinoma/diagnóstico , Conductos Pancreáticos , Neoplasias Pancreáticas/diagnóstico , Pancreatitis Crónica/diagnóstico , Adenocarcinoma/complicaciones , Adenocarcinoma/patología , Anciano , Endoscopía Gastrointestinal , Humanos , Imagen por Resonancia Magnética , Masculino , Conductos Pancreáticos/diagnóstico por imagen , Conductos Pancreáticos/patología , Conductos Pancreáticos/cirugía , Neoplasias Pancreáticas/complicaciones , Neoplasias Pancreáticas/patología , Pancreaticoduodenectomía , Pancreatitis Crónica/complicaciones , Pancreatitis Crónica/patología , Tomografía Computarizada por Rayos X , Resultado del Tratamiento
8.
RNA Biol ; 9(3): 302-13, 2012 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-22336715

RESUMEN

Recently, a large number of non-coding RNAs (ncRNAs) have been found in a wide variety of organisms, but their biological functions are poorly understood, except for several tiny RNAs. To identify novel ncRNAs with essential functions in flowering plants, we focused attention on RNA polymerase III (Pol III) and its transcriptional activity, because most Pol III-transcribed RNAs contribute to key processes relating to cell activities, and have highly conserved promoter elements: upstream sequence elements, a TATA-like sequence, and a poly(T) stretch as a transcription terminator. After in silico prediction from the Arabidopsis genome, 20 novel ncRNAs candidates were obtained. AtR8 RNA (approx. 260 nt) and AtR18 RNA (approx. 160 nt) were identified by efficient in vitro transcription by Pol III in tobacco nuclear extracts. AtR8 RNA was conserved among six additional taxa of Brassicaceae, and the secondary structure of the RNA was also conserved among the orthologs. Abundant accumulation of AtR8 RNA was observed in the plant roots and cytosol of cultured cells. The RNA was not processed into a smaller fragment and no short open reading frame was included. Remarkably, expression of the AtR8 RNA responded negatively to hypoxic stress, and this regulation evidently differed from that of U6 snRNA.


Asunto(s)
Arabidopsis/genética , ARN Polimerasa III/metabolismo , ARN Largo no Codificante/genética , Estrés Fisiológico/genética , Transcripción Genética , Arabidopsis/enzimología , Arabidopsis/metabolismo , Secuencia de Bases , Brassicaceae/genética , Hipoxia de la Célula , Biología Computacional/métodos , Secuencia Conservada , Perfilación de la Expresión Génica , Orden Génico , Genes de Plantas , Genoma de Planta , Datos de Secuencia Molecular , Conformación de Ácido Nucleico , Motivos de Nucleótidos , Transporte de ARN , ARN Largo no Codificante/química , ARN Largo no Codificante/metabolismo , Alineación de Secuencia
9.
Jpn J Clin Oncol ; 41(3): 394-9, 2011 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-20956388

RESUMEN

BACKGROUND: CSLEX is a type II carbohydrate antigen that interacts with the CSLEX-1 monoclonal antibody. CSLEX in combination with carbohydrate antigen 15-3 may be more useful than Carcinoembryonic Antigen with carbohydrate antigen 15-3 as tumor markers for monitoring of breast cancer. METHODS: The serum levels of tumor markers, including CSLEX, were measured in 480 consecutive breast cancer patients with or without metastasis who visited the outpatient clinic of the Division of Breast and Endocrine Surgery, Shinshu University Hospital, between April 2007 and September 2007. RESULTS: Serum levels of each of the tumor markers correlated significantly with the status of metastasis (P < 0.01). Combinations of Carcinoembryonic Antigen and carbohydrate antigen 15-3, Carcinoembryonic Antigen and Nation Cancer Center-Stomach-439, Carcinoembryonic Antigen and CSLEX, carbohydrate antigen 15-3 and Nation Cancer Center-Stomach-439, and carbohydrate antigen 15-3 and CSLEX levels also correlated significantly with the status of metastasis (P < 0.01). The sensitivity, specificity, positive predictive value, negative predictive value and accuracy were almost the same for CSLEX and Nation Cancer Center-Stomach-439, which are both type II carbohydrate antigens. The cutoff indexes of serum CSLEX and Nation Cancer Center-Stomach-439 for detection of breast cancer metastasis were 38.8 ± 52.7-fold and 22.1 ± 27.8-fold, respectively (P = 0.16). CONCLUSIONS: These data suggest that the diagnostic values of CSLEX and Nation Cancer Center-Stomach-439 are similar in single or combined use. However, the cutoff index of serum CSLEX tended to be higher than that of Nation Cancer Center-Stomach-439, which may make CSLEX more useful for detection of breast cancer metastasis.


Asunto(s)
Biomarcadores de Tumor/sangre , Neoplasias de la Mama/sangre , Neoplasias de la Mama/secundario , Oligosacáridos/sangre , Femenino , Humanos , Persona de Mediana Edad , Pronóstico , Curva ROC , Sensibilidad y Especificidad , Antígeno Sialil Lewis X
10.
Int J Clin Oncol ; 16(2): 156-60, 2011 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-20721595

RESUMEN

We present a case of a 39-year-old woman with a giant recurrent malignant phyllodes tumor accompanied with bleeding and infection. She underwent full-thickness chest-wall resection. Bony thorax reconstruction and stabilization was accomplished using a Composix mesh™, and soft tissue reconstruction was performed with a musculocutaneous flap of latissimus dorsi muscle. The patient had a good postoperative outcome, and the surgical treatment remarkably improved her quality of life. Because chemotherapy and radiation are not established for treating malignant phyllodes tumors, an aggressive surgical approach should be considered for patients with a locally advanced malignant phyllodes tumor.


Asunto(s)
Neoplasias de la Mama/cirugía , Recurrencia Local de Neoplasia/cirugía , Tumor Filoide/cirugía , Pared Torácica/cirugía , Adulto , Femenino , Humanos , Metástasis de la Neoplasia , Recurrencia Local de Neoplasia/patología , Tumor Filoide/patología , Procedimientos de Cirugía Plástica/métodos , Colgajos Quirúrgicos , Mallas Quirúrgicas , Procedimientos Quirúrgicos Torácicos/métodos
11.
Hepatogastroenterology ; 58(112): 1909-11, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-22234059

RESUMEN

We report two cases of inflammatory pseudotumor of the spleen treated by laparoscopic splenectomy. The first patient was a 61-year-old woman with a 3cm splenic tumor detected incidentally by ultrasonography. Computed tomography showed a well-demarcated splenic mass. She underwent hand-assisted laparoscopic splenectomy. The second patient was a 51-year-old man in whom a splenic tumor was found on follow-up computed tomography after resection of occipital malignant neurinoma. Ultrasound and magnetic resonance imaging confirmed a splenic tumor, which showed no uptake on 18F-fluorodeoxyglucose positron emission tomography. Laparoscopic splenectomy was performed. The histopathological diagnosis was inflammatory pseudotumor in both cases. Their postoperative course was uneventful, with a postoperative hospital stay of 11 and 8 days, respectively. Splenectomy is usually performed in patients with splenic tumors because imaging techniques cannot exclude malignancy. Laparoscopic splenectomy may be a useful option for patients with splenic tumors.


Asunto(s)
Granuloma de Células Plasmáticas/cirugía , Laparoscopía/métodos , Esplenectomía/métodos , Enfermedades del Bazo/cirugía , Femenino , Granuloma de Células Plasmáticas/diagnóstico , Humanos , Masculino , Persona de Mediana Edad , Enfermedades del Bazo/diagnóstico
12.
Gan To Kagaku Ryoho ; 38(7): 1123-6, 2011 Jul.
Artículo en Japonés | MEDLINE | ID: mdl-21772095

RESUMEN

Aromatase inhibitors (AI) have largely replaced tamoxifen as the first-line of treatment for postmenopausal women with advanced or metastatic hormone-receptor-positive breast cancer. However, there is no established strategy for treating AI refractory cases. In this study, we investigated the efficacy of high-dose Toremifene therapy (HD-TOR). From January 2001 through April 2010, nineteen patients received 120 mg of TOR daily. The overall response rate was 36.8% (CR; 1, PR; 6), and the clinical benefit was 47.4%. The clinical benefit rate to each of the metastatic organs were: lung, 42.9%; bone, 13%; liver, 25%; and lymph node, 40%. A higher clinical benefit rate was observed in lung or lymph node metastases. The clinical benefit rate of HD-TOR as first to third-line therapy was 50%, which was more effective than that of fourth-line therapy. Our data suggests that HD-TOR may be one of the effective treatment strategies for patients with AI refractory advanced or metastatic hormone receptor-positive breast cancer.


Asunto(s)
Antineoplásicos Hormonales/uso terapéutico , Neoplasias de la Mama/tratamiento farmacológico , Resistencia a Antineoplásicos , Toremifeno/uso terapéutico , Anciano , Anciano de 80 o más Años , Antineoplásicos Hormonales/administración & dosificación , Antineoplásicos Hormonales/efectos adversos , Inhibidores de la Aromatasa/uso terapéutico , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/patología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Metástasis de la Neoplasia , Estadificación de Neoplasias , Receptor ErbB-2/metabolismo , Receptores de Estrógenos/metabolismo , Receptores de Progesterona/metabolismo , Recurrencia , Estudios Retrospectivos , Toremifeno/administración & dosificación , Toremifeno/efectos adversos
13.
Asian J Endosc Surg ; 14(1): 28-33, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-32638531

RESUMEN

INTRODUCTION: Appropriate dissection of the infrapyloric lymph nodes (no. 6 LNs) is important in gastric cancer surgery. In laparoscopic surgery, dissection of the no. 6 LNs along the inner dissectable layer from the left side of patient has been reported. However, it is difficult for surgeons to provide appropriate traction with their left hand from the left side. To resolve this difficulty, we dissected the no. 6 LNs from the patient's right side to identify the optimal layer. We then evaluated the oncologic reliability of the layer and the safety of this procedure. METHODS: From the patient's right side, the surgeon used their left hand to provide appropriate traction when pulling the adipose tissue, including the no. 6 LNs. This exposed the optimal layer between the adipose tissue and the pancreas. To assess this maneuver, the surgical outcomes of patients who underwent laparoscopic distal gastrectomy from April 2011 to March 2013 were retrospectively analyzed. The surgical outcomes included the number of the no. 6 LNs resected, time to dissect the no. 6 LNs, incidence of pancreatic complications, and recurrence in the no. 6 LNs. RESULTS: There were 112 patients identified. The median number of the no. 6 LNs resected was five. The median time to dissect the no. 6 LNs was 14 minutes. Four patients developed pancreatic fistula, and another four patients developed intra-abdominal abscess. There was no recurrence in the no. 6 LNs. CONCLUSION: The optimal layer was oncologically reliable, and these procedures were safe.


Asunto(s)
Gastrectomía/métodos , Laparoscopía , Escisión del Ganglio Linfático/métodos , Neoplasias Gástricas , Tracción/métodos , Adulto , Anciano , Anciano de 80 o más Años , Disección/métodos , Femenino , Humanos , Ganglios Linfáticos/cirugía , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia , Reproducibilidad de los Resultados , Estudios Retrospectivos , Neoplasias Gástricas/cirugía
14.
Surg Case Rep ; 6(1): 41, 2020 Feb 24.
Artículo en Inglés | MEDLINE | ID: mdl-32095941

RESUMEN

BACKGROUND: Sebaceous carcinoma (SC) is frequently classified as periocular or extraocular. Extraocular SC is rare and mainly occurs in the head and neck, the major salivary glands, or oral mucosa. SC of the breast, lung, and ovary is particularly rare, and the few cases of SC of the breast predominantly exhibit intraductal growth. CASE PRESENTATION: A 47-year-old Japanese woman was referred to our hospital with accumulated polymorphic calcification in the left breast which was detected using mammography. Ultrasonography revealed an irregular 13-mm mass in the left breast, and analysis of a core needle biopsy revealed noninvasive ductal carcinoma. Total mastectomy and sentinel lymph node biopsy were performed. Histopathology demonstrated that carcinoma in situ (CIS) represented a significant lesion, and the cytoplasm of tumor cells was clear with numerous minute vacuoles. Immunohistochemical analysis demonstrated that most tumor cells expressed adipophilin. Together, these findings led to a diagnosis of SC, mainly comprising CIS. CONCLUSIONS: We encountered a rare case of SC of the breast with predominant CIS.

15.
Pancreas ; 49(6): 799-805, 2020 07.
Artículo en Inglés | MEDLINE | ID: mdl-32541635

RESUMEN

OBJECTIVES: Pancreatic fistula (PF) is one of the most common complications after pancreaticoduodenectomy (PD). The soft pancreatic texture is known to be an important predictive factor for PF after PD. However, its evaluation is dependent on the sense of touch by the operator during operation, thus not objective. The aim of this study was to investigate the relationship between mean elasticity via intraoperative ultrasound elastography and histological pancreatic hardness, as well as predictive factor of PF after PD. METHODS: Forty-eight patients who underwent ultrasound elastography during PD and had pancreatic parenchyma histologically evaluated were included. RESULTS: Pancreatic fistula was noted in 20 patients. There were significant differences in the histological pancreatic fibrosis rate between soft pancreas group (8.2%) and hard pancreas group (28.4%, P < 0.05) and in the mean elasticity between soft pancreas group (1.94 m/s) and hard pancreas group (3.17 m/s, P < 0.05). The mean elasticity was significantly correlated with pancreatic fibrosis rate (P < 0.05). A multivariate analysis revealed that the mean elasticity of less than 2.2 m/s was a significant predictor of PF after PD (P = 0.003). CONCLUSIONS: Intraoperative ultrasound elastography could predict pancreatic texture objectively. The mean elasticity of less than 2.2 m/s was a significant predictor of PF after PD.


Asunto(s)
Diagnóstico por Imagen de Elasticidad/métodos , Páncreas/diagnóstico por imagen , Fístula Pancreática/diagnóstico por imagen , Pancreaticoduodenectomía/métodos , Complicaciones Posoperatorias/diagnóstico por imagen , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Fibrosis/diagnóstico por imagen , Humanos , Cuidados Intraoperatorios , Masculino , Persona de Mediana Edad , Páncreas/patología , Fístula Pancreática/etiología , Pancreaticoduodenectomía/efectos adversos , Atención Perioperativa , Complicaciones Posoperatorias/etiología , Cuidados Preoperatorios , Curva ROC , Factores de Riesgo
16.
Histol Histopathol ; 35(11): 1319-1328, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-32945524

RESUMEN

BACKGROUND AND AIM: Among several noninvasive evaluation methods of portal hypertension (PH), the measurement of spleen stiffness is a reliable method for predicting esophageal variceal bleeding; however, the underlying mechanisms for increased stiffness remain unclear. We attempted to elucidate the pathological changes to the spleen and the underlying mechanisms in patients with PH. METHODS: Histological examination was performed using splenic tissues from 42 patients with PH who underwent laparoscopic splenectomy, and the results were compared with those from patients without PH. RESULTS: In addition to splenic sinus congestion, diffuse fibrosis was detected in the splenic cords in the red pulp of patients with PH. The degree of the fibrosis was well correlated with severity in thrombocytopenia and splenomegaly. Cells expressing α-smooth muscle actin dramatically increased in the splenic cord. Cytoglobin (Cygb) expression was detected in human splenic cords as reported in animal reticular cells, and fluorescent double immunostaining revealed that these cells expressed α-smooth muscle actin in patients with PH, suggesting transformation of Cygb-expressing cells to myofibroblastic cells. Expression levels of nicotinamide adenine dinucleotide phosphate oxidase (NOX) 2, nitrotyrosine, and transforming growth factor-ß were markedly upregulated in the red pulp of patients with PH, implying a significant role of oxidative stress in the mechanism for splenic fibrosis. CONCLUSION: Splenic fibrosis progresses along with advancement of PH. Cygb-expressing cells in the splenic cord possibly participate in this process through mechanisms including oxidative stress.


Asunto(s)
Citoglobina/metabolismo , Hipertensión Portal/etiología , Cirrosis Hepática/complicaciones , Bazo/metabolismo , Enfermedades del Bazo/etiología , Anciano , Biomarcadores/metabolismo , Progresión de la Enfermedad , Femenino , Humanos , Hipertensión Portal/diagnóstico , Laparoscopía , Cirrosis Hepática/diagnóstico , Masculino , Persona de Mediana Edad , Estrés Oxidativo , Bazo/patología , Bazo/cirugía , Esplenectomía , Enfermedades del Bazo/metabolismo , Enfermedades del Bazo/patología , Enfermedades del Bazo/cirugía
17.
J Hepatobiliary Pancreat Surg ; 16(6): 808-15, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19466379

RESUMEN

BACKGROUND/PURPOSE: Laparoscopic liver resection has not gained wide acceptance compared with other laparoscopic procedures. We evaluated the impact of simulated surgery using data from multidetector CT scanning on planning for laparoscopic hepatectomy. METHODS: The hepatectomy simulation system was programmed to perform three-dimensional reconstruction of the vasculature and to calculate the liver resection volume and surgical margin. In 35 patients undergoing laparoscopic hepatectomy or laparoscopy-assisted hepatectomy, the liver resection volume and margin were estimated by simulation preoperatively. Then, the estimated values were compared with the actual resected liver weight and margin. RESULTS: Three-dimensional reconstruction allowed stereoscopic identification of the tumor-bearing portal vein and draining vein. The predicted liver resection volume and margin both showed a significant correlation with the actual values: the mean difference was 21 mL (P < 0.0001) and 1.3 mm (P < 0.01), respectively. Preoperative planning based on simulated resection facilitated laparoscopic mobilization of the liver and mini-laparotomy resection of a large tumor located in the upper right lobe. CONCLUSIONS: Three-dimensional simulation of hepatectomy facilitated intraoperative identification of the vascular anatomy, and accurately predicted the resected liver volume and surgical margin. This simulation method should contribute to preoperative planning for safe and curative laparoscopic hepatectomy.


Asunto(s)
Carcinoma Hepatocelular/diagnóstico por imagen , Carcinoma Hepatocelular/cirugía , Hepatectomía/métodos , Laparoscopía/métodos , Neoplasias Hepáticas/cirugía , Hígado/diagnóstico por imagen , Cirugía Asistida por Computador/métodos , Carcinoma Hepatocelular/irrigación sanguínea , Femenino , Humanos , Hígado/cirugía , Neoplasias Hepáticas/irrigación sanguínea , Neoplasias Hepáticas/diagnóstico por imagen , Masculino , Ilustración Médica , Persona de Mediana Edad , Cuidados Preoperatorios , Tomografía Computarizada por Rayos X/métodos
18.
Appl Environ Microbiol ; 74(11): 3400-9, 2008 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-18390671

RESUMEN

7-Aminocephalosporanic acid (7-ACA) is an important material in the production of semisynthetic cephalosporins, which are the best-selling antibiotics worldwide. 7-ACA is produced from cephalosporin C via glutaryl-7-ACA (GL-7-ACA) by a bioconversion process using d-amino acid oxidase and cephalosporin acylase (or GL-7-ACA acylase). Previous studies demonstrated that a single amino acid substitution, D433N, provided GL-7-ACA acylase activity for gamma-glutamyltranspeptidase (GGT) of Escherichia coli K-12. In this study, based on its three-dimensional structure, residues involved in substrate recognition of E. coli GGT were rationally mutagenized, and effective mutations were then combined. A novel screening method, activity staining followed by a GL-7-ACA acylase assay with whole cells, was developed, and it enabled us to obtain mutant enzymes with enhanced GL-7-ACA acylase activity. The best mutant enzyme for catalytic efficiency, with a k(cat)/K(m) value for GL-7-ACA almost 50-fold higher than that of the D433N enzyme, has three amino acid substitutions: D433N, Y444A, and G484A. We also suggest that GGT from Bacillus subtilis 168 can be another source of GL-7-ACA acylase for industrial applications.


Asunto(s)
Cefalosporinas/metabolismo , Escherichia coli K12/enzimología , Proteínas de Escherichia coli/genética , Proteínas de Escherichia coli/metabolismo , gamma-Glutamiltransferasa/genética , gamma-Glutamiltransferasa/metabolismo , Secuencia de Aminoácidos , Sustitución de Aminoácidos/genética , Proteínas de Escherichia coli/aislamiento & purificación , Cinética , Modelos Moleculares , Datos de Secuencia Molecular , Mutación Missense , Alineación de Secuencia , gamma-Glutamiltransferasa/aislamiento & purificación
19.
Mutat Res ; 654(2): 138-44, 2008 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-18585474

RESUMEN

Heavy metal pollution of soil causes biological problems, such as mutagenicity to living organisms, including human beings. However, few methods have been developed to assess metal mutagenicity in soil. To avoid metal mutagenicity, an adequate bio-monitoring method is required. In the present study, to determine if the analysis of oxidative DNA damage generated in the earthworm is a useful bio-monitoring method for soil mutagenicity, the accumulation of 8-hydroxydeoxyguanosine (8-OH-dG), a major form of oxidative DNA damage, in Eisenia fetida (Savigny, 1826) treated with cadmium chloride (CdCl2) or nickel chloride (NiCl2) was analyzed. E. fetida was treated with Cd (10 or 200 microg/g soil) or Ni (10 or 200 microg/g soil) for 1, 2, and 3 weeks or 3 months. After metal exposure, the metal concentration in E. fetida was analyzed by atomic absorption spectrometry and the 8-OH-dG accumulated in E. fetida was analyzed by HPLC analyses and immunohistochemistry. Atomic absorption spectrometry revealed that Cd, but not Ni, accumulated within E. fetida. The 8-OH-dG levels in the DNA of E. fetida treated with Cd for 3 months were significantly higher than those in control E. fetida. Moreover, immunohistochemical analyses revealed that positive signals for 8-OH-dG accumulation in seminal vesicles were detected only in E. fetida treated with 10 microg of Cd for 3 months. Although some points remain unresolved, a bio-monitoring system analyzing the DNA damage generated in the earthworm might be useful for the assessment of the mutagenicity of soil contaminated with various heavy metals, such as Cd.


Asunto(s)
Cloruro de Cadmio/toxicidad , Guanina/análogos & derivados , Metales Pesados/toxicidad , Níquel/toxicidad , Oligoquetos/metabolismo , Contaminantes del Suelo/toxicidad , 8-Hidroxi-2'-Desoxicoguanosina/análogos & derivados , Animales , Biomarcadores/análisis , Cloruro de Cadmio/análisis , Daño del ADN , Relación Dosis-Respuesta a Droga , Guanina/análisis , Guanina/biosíntesis , Masculino , Mutágenos/análisis , Níquel/análisis , Oligoquetos/genética , Vesículas Seminales/química
20.
Am Surg ; 84(12): 1938-1944, 2018 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-30606352

RESUMEN

It has been obscure whether or not noncurative hepatic resection (Hx) has a favorable impact on the clinical course in patients with advanced hepatocellular carcinoma (HCC). The aim of this study is to clarify the significance of noncurative Hx for advanced HCC. Among 666 consecutive patients undergoing Hx for HCC in our department, 79 patients underwent noncurative Hx. These patients were classified as Group A (presence of macrovascular invasion [MVI]; n = 29), Group B (residual tumors in the remnant liver; n = 37), Group C (residual tumors in the remnant liver with MVI; n = 7), or Group D (residual tumors in the remnant liver with distant metastasis [with or without MVI]; n = 6). The three-year survival rates were 49.6 per cent in Group A, 30.3 per cent in Group B, 14.3 per cent in Group C, and 0.0 per cent in Group D, respectively (Groups A and B vs Group D, P < 0.05). Moreover, the survival rate was significantly higher in patients with ≤3 tumors than in those with ≥4 tumors (P < 0.05), when Group B was divided into subgroups according to the number of residual tumors in the remnant liver. In conclusion, noncurative Hx might be acceptable for advanced HCC with MVI or ≤3 residual tumors in the remnant liver.


Asunto(s)
Carcinoma Hepatocelular/cirugía , Hepatectomía/métodos , Neoplasias Hepáticas/cirugía , Hígado/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Carcinoma Hepatocelular/patología , Femenino , Humanos , Hígado/patología , Neoplasias Hepáticas/patología , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Riesgo
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