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Biomedical subjects

S Tashiro

Publications and source records attributed to S Tashiro.

At least 109 records · Page 6Linked to original sources
PubMed1987

New technique for pancreaticojejunostomy using a biological adhesive.

A new technique of pancreaticojejunostomy using a fibrin glue biological adhesive system (BAS) after pancreaticoduodenectomy is reported. Pancreaticojejunostomy was performed on 112 patients between 1971 and 1985. Forty-two of the patients received BAS application (Group I), but the remaining seventy did not (Group II). To evaluate more precisely the effectiveness of BAS, 22 patients in Group I (Group I-ST) and 26 patients in Group II (Group II-ST) who were operated upon by the same surgeon during the same period were reviewed retrospectively. The selection of patients for the use of BAS was randomized. In Group I-ST, one patient had a minor leak; no major leaks or operative deaths occurred. Two of the twenty-six patients in Group II-ST had minor leaks and one patient had a major leak causing death. This new technique for pancreaticojejunostomy using a biological adhesive system may be useful for preventing anastomotic leaks, especially in a patient with a normal pancreas.

Bandages↗
PubMed1986

Concentrations of metallothionein and metals in malignant and non-malignant tissues in human liver.

Concentration of metallothionein in the malignant and non-malignant tissues of the human liver was determined by the Cd-hem method. The concentration of metallothionein was high in the non-malignant tissue (471 +/- 306 micrograms/g). Metallothionein in the non-malignant tissue was mainly Zn-thionein and metallothionein-bound Zn was a major chemical form of Zn in the non-malignant tissue. The concentration of metallothionein in the malignant tissue was 75.6 +/- 79.6 micrograms/g, and significantly lower than that in the nonmalignant tissue. A strong, positive relationship was observed between the Zn and metallothionein concentrations, and the regression equation was MT (microgram/g) = -94.7 + 11.9 Zn (micrograms/g).

Adult↗
PubMed1986

[CT image of the liver cancer after administration of SMANCS/lipiodol].

A new type of anticancer agent with an amphiphilic nature, poly (styrene-co-maleic acid)-conjugated neocarzinostatin [SMANCS], was dissolved in the lipid contrast medium Lipiodol [SMANCS/LPD]. This medium was injected intra-arterially and was found to be an invaluable tool for highly sensitive CT image analysis of tumors. Following administration, CT images revealed high-density areas which corresponded to the location and size of liver cancer, the smallest being 4 mm in diameter. The deposition pattern of SMANCS/LPD in liver cancers by CT was classified into 3 types. In type A, Lipiodol was distributed relatively evenly in the tumor lesion, while in type B it was accumulated predominantly around the tumor periphery, the central portion remaining low in density. A for cases exhibited a type C pattern which was a mixture of types A and B. Type A was found essentially in primary liver cancer, and types B and C in secondary liver cancer. Thus, the CT pattern was found to be useful for differential diagnosis. For a sufficient therapeutic effect, 0.08 ml of SMANCS/LPD per cm2 of the maximal CT cross-section of the tumor area was found to be necessary. As a routine protocol after SMANCS/LPD administration, CT scanning was recommended for primary liver cancer initially at one week and then once every month. Secondary liver cancer required more frequent CT follow-ups after administration, on the 3rd day, after one and two weeks, and every month, due to the relatively rapid disappearance of the stain than in primary liver cancer.

Antibiotics, Antineoplastic↗
PubMed1986

Anticancer effects of local administration of mitomycin C via the hepatic artery or portal vein on implantation and growth of VX2 cancer injected into rabbit liver.

Rabbits were inoculated with a suspension of VX2 carcinoma cells in the liver, and mitomycin C was given via the hepatic artery or the portal vein for a study of the anticancer effects. Twenty-eight rabbits were killed for preliminary study at 1 h or 1, 3, 7, 9, 12, or 14 days after the inoculation. Another 36 rabbits were divided into three groups. Groups A and B were given the agent (0.5 mg/kg), 1 h after the inoculation and on Days 2, 4, 6, and 8, into the common hepatic artery or the splenic vein, respectively. Group C was not treated after inoculation. The mean numbers of cancer nodules per rabbit in Groups A, B, and C were 11.9, 36.4, and 83.4, respectively, at 12 days after inoculation. The number of cancer nodules of Group A was smallest (P less than 0.025, F test). The means of the total cross-sectional area of tumor nodules in Groups A, B, and C were 32.7, 79.7, and 217.3 mm2, respectively. The total cross-sectional area of the cancer nodules of Group A was smallest (P less than 0.05, F test). These results suggest that the anticancer agents given via the hepatic artery had better effects on early (small) metastatic liver tumor than those via the portal vein.

Animals↗
PubMed1985

Streptozotocin effective for treating multiple-hormone-producing malignant islet cell tumor.

A woman with a multiple-hormone-producing pancreatic islet cell tumor with hepatic metastases and with recurrent hypoglycemic attacks, was treated with streptozotocin. After this treatment, the elevated serum levels of insulin, C-peptide, glucagon and serotonin fell markedly and the low level of fasting blood glucose returned to normal. In accordance with these hormonal changes, scintiscan and CT scan revealed marked regression of the metastatic tumors in the liver. She is alive at this writing, five years after the streptozotocin treatment. Streptozotocin should thus be considered for treatment of malignant islet cell carcinoma with liver metastases and which is not amenable to surgery.

Adenoma, Islet Cell↗
PubMed1985

Hepatocellular carcinoma and metastatic cancer detected by iodized oil.

An oily contrast medium was injected into the hepatic artery in rabbits with implanted VX2 carcinoma in the liver. The contrast medium was initially detected in all of the branches of the injected artery, but 3 and 7 days after injection it was found only in the tumor tissue on plain radiographs. Taking advantage of this phenomenon, an oily contrast medium was injected into the hepatic artery in 5 patients with liver tumors. A plain radiograph of the abdomen after the injection presented a clearer picture of the tumor and detected smaller tumors, compared with a conventional selective celiac angiogram in 5 patients. It is concluded that an injection of oily contrast medium into a hepatic artery is a useful technique to detect liver tumor.

Adenocarcinoma↗
PubMed1984

Selective targeting of anti-cancer drug and simultaneous image enhancement in solid tumors by arterially administered lipid contrast medium.

Twenty-four patients with various solid tumors including metastatic liver cancer and cancer of the lung, gallbladder, and pancreas were treated with a lipophilic macromolecular drug, copoly(styrene-maleic acid) conjugated neocarzinostatin (SMANCS). The drug was dissolved in a lipid contrast medium Lipiodol and administered by catheterizing the respective feeding arteries under x-ray monitoring. The advantages of this therapy include: (1) selective deposition of Lipiodol with the anti-cancer drug in the target tumor, (2) a pronounced and long-lasting anti-cancer effect, (3) enhanced visualization of the tumor on x-ray examinations for a prolonged period which also facilitated the long-term follow-up, (4) semiquantitative evaluation of the dosage regimen by x-ray examination before further administration, (5) general applicability due to procedural simplicity, and (6) little side effect. Since the amount of Lipiodol and SMANCS used per administration for a patient (1.0-5.0 ml; 1.0-5.0 mg) was far less than the anticipated toxicity (LD50 of Lipiodol = 95 ml/60 kg, dog, intravenously; and that of SMANCS = 3.4 mg/kg, mouse, IV), no deleterious effects to such critical organs as the brain, heart, lung, liver, or kidneys were observed upon radiologic and general clinical examination.

Adenocarcinoma↗
PubMed1984

Hepatic hematoma after blunt trauma--a case of nonoperative management to prevent liver abscess formation.

In an eighteen-year-old boy with a high fever, an intra-hepatic infectious hematoma following blunt hepatic trauma was treated twice with intrahepatic arterial injection chemotherapy in an attempt to prevent conversion of the hematoma to an abscess. A decrease in body temperature occurred after the arterial injections, and the hematoma was gradually diminished in size. In selected patients with blunt hepatic trauma, intrahepatic arterial injection chemotherapy seems to be an effective treatment for prevention of liver abscess formation.

Adolescent↗
PubMed1984

Hepatic granuloma. Report of a case successfully treated by hepatectomy and antituberculous therapy.

A 62 year-old male presented with high fever, weight loss and painful hepatomegaly. The clinical presentation, results of laboratory studies, angiography and laparotomy suggested hepatic abscess or cholangiocarcinoma. He underwent left lobe hepatectomy, and pathological examinations revealed granuloma. Acid-fast bacilli, fungi and parasites were not identified by special stainings. Hepatic tuberculosis was considered most likely because, after operation, an intermediate-strength purified protein derivative (PPD) skin test gave strongly positive results and his subsequent response to antituberculous treatment was excellent. His complex clinical features and the diagnostic difficulties were outlined.

Antitubercular Agents↗
PubMed1984

[Arterial administration of SMANCS and other antitumor agents dissolved in lipiodol for various malignant solid tumors].

Selective deposition of lipiodol in primary and metastatic liver cancer, lung cancer, gallbladder cancer, pancreatic cancer and renal cancer was elucidated by plain X-ray film and CT. Selective delivery of anticancer agent, SMANCS was also proved by measurement of its biological activities of removed specimen. Because of these selective delivery of anticancer agent and embolization of neovasculature in the tumor, highly effective chemotherapy of unresectable cancer was established. Drug was given via celiac, the hepatic, bronchial or renal artery mostly 1-5 mg in 1-5 ml of lipiodol once every 3-8 weeks. Antitumor effects of this therapy for hepatocellular carcinoma was confirmed based on decrease in AFP levels (92% of the cases), reduction in tumor size (90% of the cases) and histology. In 76 percent of the patients with the other malignant solid tumors reduction in tumor size was recognized. Decrease in CEA level occurred in 88 percent of the cases with metastatic liver cancer and lung cancer. Major side effect was transient fever in about 50% of cases. Mitomycin C and aclarubicin dissolved in lipiodol showed remarkable antitumor effects for experimental liver cancer.

Aclarubicin↗
PubMed1984

[Tumor selective drug delivery with lipid contrast medium (smancs/lipiodol): sustained antitumor effect, enhanced diagnostic value and quantification of dosage regimen].

A new method for the treatment of solid tumor, in particular, primary and metastatic liver cancer using a hydrophobic-polymer conjugated macromolecular anticancer agent, smancs is described. Smancs was dissolving in a lipid contrast medium, Lipiodol, as an injection into the feeding artery. The marked antitumor effect was observed in both experimental animals and human trials. In the patients with hepatocellular carcinoma, both reductions in tumor size and alpha-feto-protein were observed in 91% of the patients. The survival period of the treated patient with highly advanced stage and inoperable cases was comparable to or better than that of resected cases. No major side effect such as bone marrow suppression or liver toxicity was observed due to selective drug delivery to the tumor. About half of the patients, however, showed a transitory fever (37-39 degrees C) for 1-3 days. The mechanism for such selective tumor targeting of anticancer agent appears to be due to the difference in the vascularity of tumor and normal tissue. Furthermore, we found that lack of lymphatic clearance system in the tumor made the prolonged and selective retention of such lipophilic drug in the tumor tissue possible. Another advantages of this method are found in radiological approaches. Differential diagnosis of primary or metastatic cancer became possible and dosing regimen can be determined since a presence of the contrast medium is restricted to the tumor area and it parallels to that of the drug being dissolved. Insufficiency in X-ray staining indicates a need for subsequent injection. The selective remaining of Lipiodol in the tumor for long period may help follow-up study as well.

Animals↗
PubMed1983

Studies on anticancer treatment with an oily anticancer drug injected into the ligated feeding hepatic artery for liver cancer.

In six adult patients with nonresectable liver cancer, as well as in mature New Zealand white rabbits with implanted VX2 carcinoma in the liver, the artery feeding the hepatic lobe with the malignant lesion was ligated, and an oily contrast medium (Lipiodol Ultra-Fluid) was injected into the hepatoproximal lumen of the ligated artery of the liver with carcinoma. The oily contrast medium was detected in all the branches of the artery injected, and thereafter was found only in tumor tissue for 7 days experimentally and for 16 months clinically. Taking advantage of this phenomenon, the therapeutic effect of the injection of an oily anticancer drug (bleomycin oil suspension) into the hepatoproximal lumen of the ligated hepatic artery was investigated in rabbits with VX2 carcinoma of the liver. The mean concentration level of bleomycin in the tumor tissue was 2.4 +/- 0.4 microgram/g 1 week after the injection of bleomycin oil suspension (1.5 mg potency/kg) in three rabbits. However, its concentration level in nontumorous tissue of the liver was undetectably low in two rabbits, but 0.6 microgram/g in the third rabbit. The group of rabbits receiving an injection of bleomycin oil suspension into the ligated artery had a significantly longer mean survival time than those of the experimental group receiving an injection of saline solution of bleomycin into the ligated artery as well as the three other groups treated (P less than 0.02, N = 5 for each group). It may be concluded that an oily anticancer drug injected into the hepatoproximal lumen of the ligated hepatic artery can intensify the anticancer effects of a ligation of the hepatic artery for liver cancer.

Animals↗
PubMed1983

Alpha-fetoprotein and human chorionic gonadotropin in embryonal carcinoma of the ovary. An 8-year survival case.

An 11-year-old female with a large embryonal carcinoma of the left ovary was treated by unilateral salpingo-oophorectomy combined with a systemic chemotherapy of a total dose of 1.9 mg of dactinomycin. The preoperative serum alpha-fetoprotein (AFP) level of 70,350 ng/ml decreased to 270 ng/ml 5 weeks after the operation. Thereafter, the serum AFP level remained within a normal range. The preoperative urinary human chorionic gonadotropin (HCG) level of 16,000 IU/L fell to a normal range 3 days after the surgery. Histologic sections of the tumor showed embryonal carcinoma. HCG was identified in the syncitiotrophoblastic giant cells and AFP was identified within the mononuclear epithelial cells and in some hyaline droplets in the tumor by using the immunohistochemical technique. The patient has survived 8 years after the operation. It was concluded that the patient had a very rare ovarian embryonal carcinoma, in which AFP and HCG were identified immunohistochemically.

Child↗