24 research outputs found

    Action mechanism in vitro of sensitized regional lymph node cells on target cell. I. Anti-growth effect of regional lymph node cells of Ehrlich cancer transplanted mouse and that of normal lymph node cells induced by PHA, on Ehrlich cancer cell line (JTC-11)

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    Under in vivo conditions JTC-II cells derived from Ehrlich ascites&#12288;tumor are led to destruction by lymph node cells by two processes. The&#12288;one is the interaction of lymph node cells of the C57BL (&#9792;) mouse sensitized with Ehrlich ascites tumor cells, and the other is the interaction of&#12288;normal C57BL (&#9792;) mouse lymph node cells treated with PHA-M. In&#12288;these two reaction systems the following differences have become clear. The regional lymph node cells from the C57BL (&#9792;) mouse sensitized&#12288;with Ehrlich ascites tumor cells show a marked inhibitory effect on the&#12288;growth oflTC-II cells by 10 days after sensitization.&#12288;In the observations under the phase contrast microscope these lymph node cells tend to adhere around the antigenic cells by culture hour 5-6, and by culture hour 24-48 they lead the latter to undergo cytolysis. The normal lymph node cells of C57BL (&#9792;) mouse treated with PHA show anti-growth effect oflTC-II cells. PHA-M used proves to be effective in the concentration of 2% (v/v). Likewise after such normal lymph node cells are previously treated with 2% PHA-M for 12 hours, they also inhibit the growth of lTC-II cells when two cell groups are cultured together. In such intercellular reaction between the two cell groups there is no specificity. By observations under the phase contract microscopy, by culture hour 2-3 the adherence and aggregation of lymph node cells begin to occur, and by 18-24 hours of culture the target cells are led to undergo cytolysis. In this instance, lymph node cells are prone to adhere and aggregate on one side of the target cell.</p

    Allogeneic inhibitory activity of regional lymph node cells in the mouse isografted with methylcholanthrene-induced tumor

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    In mouse bearing progressive cancer a decrease was present in the allogeneic inhibitory activity of T-lymphocytes, which constitutes the core of immunological surveillance system in mammalians. For tests, methylcholanthrene-induced tumor (MC-tumor) was isografted subcutaneously on the back between scapulae of C3H mice, and the lymphocytes were prepared from the regional axillary lymph nodes removed from these mice at 1, 2, 3, or 4 weeks after grafting. These lymph nodes cells were cultured together with 40-fold numbers of allogeneic JTC-11 cells derived from Ehrlich cancer cells in a culture medium containing 2.0% (v/v) PHA for 24 or 48 hours. The proliferation rate of JTC-11 cells (increased numbers) at weekly interval was considered the allogeneic inhibitory activity of lymph node cells. As a result it was demonstrated that in the early stage after tumor transplantation, i.e., in the first or second week, regional lymph node cells showed a strong allogeneic inhibitory activity, as in the case with lymph-node cells from normal mice, but at progressive stage of cancer, i.e., the third or fourth week when tumors were larger, such activity was completely lost. It seems that mice with progressive cancer showed a decrease of allogeneic inhibitory activity, i.e., a disruption of homeostasis was present.</p

    Treatment of gastric cancer with situs invertsus totalis : A case report

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    Situs inversus totalis (SIT) is a relatively rare congenital anomaly with a reported incidence of 1 in 5,000 to 10,000 live births. Although some reports of SIT with malignancy have been published, there have been few reports on SIT with gastric cancer or on the potential complications of surgical intervention in such cases. We here report the case of a patient who underwent surgical treatment for gastric cancer with SIT. The patient was a 54-year-old male, who had been an outpatient with chronic hepatitis and diabetes mellitus. He received an upper endoscopic examination for follow-up of esophageal varices and type 2 ulcerative gastric cancer was found at the posterior wall of the lower stomach. Biopsy was performed and the patient was diagnosed with moderately differentiated gastric cancer. Distal gastrectomy was performed with precise preoperative anatomical analysis in order to confirm that there was no another anomaly, such as cardiovascular or congenital anatomical anomalies except for the inverted position of all of the viscera. Adequate anatomical examination and analysis of the inverted position of related vascular for surgical treatment could lead to safer interventional treatment for malignancies with SIT

    A case of giant cavernous hemangioma of the liver complicated by intravascular coagulopathy.

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    A case of liver hemangioma complicated by intravascular coagulopathy is presented because of the rarity of the association. Hemangioma of the liver was suspected by palpation of the liver tumor, scintigraphy and x-ray examination, and confirmed by selective hepatic arteriography in combination with exploratory laparotomy. Intravascular coagulopathy was established by demonstrating secondary fibrinolysis and consumption of platelets and coagulation factors. Unconjugated hyperbilirubinemia due to micro-angiopathic hemolytic anemia was also present. The clinical course of the clotting abnormalities was basically a chronic one with an occasional acute or subacute defibrination process associated with further enlargement of the hepatic tumor. These provide sufficient evidence that the intravascular coagulopathy was closely related with the hemangioma in the liver. Neither ligation of a presumed nutritional artery of the hemangioma nor radiation therapy caused any demonstrable reduction in the tumor size.</p

    A case of biliary cystadenocarcinoma arising in the liver with a congenital retention of indocyanine green.

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    A case of biliary cystadenocarcinoma that occurred in a 45-year-old woman is reported. Ultrasonography and computed tomography clearly revealed papillary projections in the cyst of the liver. Percutaneous transhepatic cystography showed connection between the cyst and the common bile duct. The tumor was surgically resected and proved to be a mucinous papillary adenocarcinoma arising from a biliary cystadenoma. The patient is doing well 4 years after surgery. Interestingly, this is the first reported case of a biliary cystadenocarcinoma in the liver with markedly diminished excretion of indocyanine green.</p

    A case of primary retroperitoneal mucinous cystadenocarcinoma.

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    A rare case of primary retroperitoneal mucinous cystadenocarcinoma in a 44-year-old woman is reported. The cystic tumor was delineated by CT and echography. The tumor was removed intact in the presence of bilateral normal ovaries and demonstrated an infiltrating malignant process. This neoplasm may have arisen from a supernumerary ovary. The patient died of recurrence 4 months after surgery. A comparison of the known cases indicates that aggressive treatment by hysterectomy with bilateral salpingo-oophorectomy in addition to cyst extirpation may improve prognosis.</p

    Cancer immunotherapy with surgery

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    With the recent advances in the immunological surveillance system, an understanding of the role of host immunity has become essential to the management of carcinogenesis, tumor proliferation, recurrence and metastasis. Although it is important to continue chemical and surgical treatment of cancer, support of the anti-tumor immune system of the host should also be considered. Long term remission has been reported in leukemia by treating with BCG after chemotherapy whereas surgical treatment is usually more effective in preventing cancer recurrence in digestive organ cancer. The first step is extirpating the tumor as thoroughly as possible and the second step is chemo-immunotherapy. Cancer immunity, however weak, constitutes the basis for other treatments in selectively attacking cancer cells remaining after surgery, chemotherapy or irradiation. Immunotherapy should thus not replace chemotherapy or radiotherapy, but these methods should be employed in combination to attain more favorable results.</p

    A Case of Chronic Pancreatitis with Pseudoaneurysm Rupturing into a Pseudocyst

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    A 44-year-old man with alcohol-induced chronic pancreatitis was referred to our institute for evaluation of severe anemia. The hemoglobin was 2.6g/dl. The results of upper gastrointestinal and colonic examination were negative. Computed tomography and ultrasound examination revealed a pseudocyst in the head of the pancreas. A pseudoaneurysm of the anterior superior pancreaticoduodenal artery shown by angiography appeared to have caused gastrointestinal bleeding by rupturing into the pancreatic cyst connected to the main pancreatic duct. A pyrorus-preserving pancreaticoduodenectomy was performed successfully.</p

    Time-lapse changes in the concomitant immunity of lymphocytes from different sites of mice isografted with methylcholanthrene-induced tumor.

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    As a step in the elucidation of the mutual relationship between the degree of cancer progress and the antitumor activity of lymphocytes from different sites in cancer-bearing body, we isografted methylcholanthrene-induced tumor (MC-tumor) subcutaneously on the back of mice. The regional axillary lymph nodes, spleen and distant mesenteric lymph nodes were removed from these animals one, two, three, and four weeks later. We mixed lymphocytes prepared from these lymphatic tissues with primary MC-tumor culture cells and cultured together to estimate antitumor acitivity of lymphocytes from different sites. It has been found that a strong antitumor activity can be seen only in those regional axillary lymph node cells taken out one or two weeks after tumor transplatation and such an activity is weakened by three or four weeks. On the other hand, distant mesenteric lymph node cells one or two weeks after the transplantation have no antitumor activity as yet, while at the terminal cancer stage of four weeks there appears a stronger antitumor activity than that of regional lymph nodes. In the spleen, a strong antitumor activity can be observed in the third week after tumor transplantation, but the activity disappears by the fourth week. These findings support our previous findings in that for the tumor onset after the transplantation the antitumor activity seems to appear first in the regional lymph nodes, and when the tumor grows beyond a certain size, such an activity diminishes while it appears in further distant lymphatic tissues.</p

    Real-Time Evaluation of the Effectiveness of Microwave Coagulation Therapy for Hepatocellular Carcinoma Using Color Doppler Imaging

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    Percutaneous microwave coagulation therapy (PMCT) is a new technique for the treatment of hepatocellular carcinoma (HCC). However, it is difficult to distinguish those lesions in which necrosis has been induced from the viable residual lesions during the procedure, because the margin of the tumor becomes unclear during PMCT. We determined the area of necrotic lesions during the procedure using color Doppler imaging. PMCT was performed on 10 patients (17 lesions) with recurrent HCC. The electrode of the microwave delivery system was moved around the tumor and the surrounding area until color mosaic images disappeared from the entire area of the tumor. The areas in which necrotic tissue was indicated by color Doppler imaging were later confirmed by other modalities such as angiography or contrast-enhanced computed tomography. This leads us to believe that real-time, effective evaluation of PMCT is possible with color Doppler imaging.</p
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