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Biomedical subjects

R Yamaki

Publications and source records attributed to R Yamaki.

14 recordsLinked to original sources
PubMed1980

Malignant fibrous histiocytoma of the heart.

A 33-year-old woman presented signs and symptoms which suggested mitral stenosis and insufficiency. Subsequent echocardiographic and angiographic testing demonstrated a left atrial tumor which was suspected clinically to be a left atrial myxoma. At surgery, the tumor was partially resected and histological examination revealed that the mass to be a malignant fibrous histiocytoma. At autopsy, the tumor was found to be localized in the heart, and there was no metastasis.

Adult↗
PubMed1979

Expanded polytetrafluoroethylene grafts for small artery replacement.

Twenty vascular grafts of expanded polytetrafluoroethylene with a 1.5 mm. internal diameter and a 4.0 cm. length, were placed in the femoral arteries of dogs. The animals, divided into two groups, with and without pluronic F 68, were sacrificed two weeks after surgery. The patency rate was 33.3% (2/6) and 21.5% (3/14), which was not statistically significant. One factor contributing to the occlusion of the grafts were excessive proliferation of granulation tissue due to early formation of the thrombus. Histological findings showed that the pseudointima was almost complete, although it was only about 0.114 mm. thick at the anastomotic line.

Animals↗
PubMed1977

End-to-side anastomosis of the mesenteric vein to the inferior vena cava in the treatment of glycogen storage disease: case report.

A 2-year-old boy with Type I glycogen storage disease received an end-to-side anastomosis of the mesenteric vein to the inferior vena cava with marked improvement in his biochemical factors and nutritional status and with shrinkage of the liver. The efficacy and simplicity of this technique and its lack of complications, as evidenced by follow-up studies over a 4 year period, suggest that its further use is warranted.

Ammonia↗
PubMed1975

Reevaluation of parasternal lymph node dissection in the treatment of mammary cancer.

One hundred and forty one patients with mammary cancer underwent the extended radical mastectomy with parasternal lymph nodes dissection between January, 1966 and December, 1974. From the basis of the present report involvement of parasternaly lymph node chain was evaluated retrospectively with respect to the stage, location, size, histological type of cancer, metastasis to axillary and subclavicular lymph nodes, and the five-year survival rate. The parasternal as well as subclavicular and axillary lymph node involvements were not found in non-infiltrating cancer. The more the stage of cancer advanced, the more frequently the parasternal lymph nodes were involved regardless of the location of cancer in the breast. The parasternal lymph node chain alone was rarely involved, but frequently affected along with the axillary lymph nodes. When the parasternal lymph nodes were involved, the five-year survival rate was extremely poor, even after their surgical removal. Subsequently, addition of parasternal lymph node dissection does not seem to be beneficial.

Adult↗
PubMedDate not supplied

Mitral insufficiency in an incomplete form of Marfan syndrome corrected with valve replacement.

A 14-year-old boy with an incomplete form of the Marfan syndrome developed an acute episode of severe congestive heart failure following exertion. The preoperative studies indicated a mitral insufficiency, and a floppy, thickened mitral valve was removed and replaced with a Starr-Edwards prosthesis. Microscopically, the valve showed increase in collagen with central myxomatous transformation. Seven months postoperatively the patient is doing well and has no symptoms of heart failure.

Adolescent↗