Toshitaka Uehara

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Foci of stromal melanocytes (FSM) of the uterine cervix have been known as extra-cutaneous “blue naevus”. However macroscopic and histological findings suggest that FSM of the cervix are analogous to dermal melanocytosis, rather than to cutaneous blue naevus and the lesions are more appropriately called stromal melanocytosis. FSM of the cervix have been(More)
BACKGROUND Neuroendocrine tumor cells in prostate cancer are thought to increase after hormonal therapy due to neuroendocrine differentiation of tumor cells. This assumption is based on the histological analyses of limited portions of the cancerous lesions examined. METHODS Radical prostatectomy specimens were obtained from 122 consecutive patients with(More)
Schwannoma of the large bowel is a rare clinical entity, which has reportedly been recognized to arise from one place with a submucosal tumor morphology. We present herein the unique case of a 25-year-old woman who suffered from a schwannoma diffusely involving the entire large intestine. The patient complained of abdominal distension and imaging studies(More)
Neurilemmoma of the breast is rarely seen, although it is common at intracranial or peripheral sites. There have been only 14 cases described in the literature. We present the fifteenth case of a 64-year-old woman with neurilemmoma of the breast, the first to be diagnosed by fine needle aspiration cytology. Fibroadenoma must be distinguished from this(More)
Immunohistochemical characteristics of undifferentiated carcinomas of the ovary were examined using formalin-fixed, paraffin-embedded tissues with an avidinbiotin staining approach. Eight cases were collected from the pathology files of our Institute from a total of 214 recorded malignant ovarian tumors. For immunostaining, antibodies reacting with(More)
We report herein the case of a 63-year-old male with hemoperitoneum secondary to exogastric leiomyoma. The patient had been receiving anticoagulation therapy for a cerebral embolism and complained of sudden, severe abdominal pain. A sonogram and computed tomography scan showed an exogastric mass and massive ascites. A peritoneal puncture proved the presence(More)
Breast cancer metastasis to pancreas is rarely seen. There have been only 6 cases described in the literature. We present the seventh case of a 54-year-old woman with breast cancer that metastasized to the tail of the pancreas 4 years and 4 months after radical mastectomy. Although the serum levels of CA15-3 and TPA had gradually increased without symptoms,(More)
Metaplastic carcinoma (carcinoma with pseudosarcomatous metaplasia) of the breast are high-grade carcinomas in which much of the tumor undergoes metaplastic change producing a pseudosarcomatous pattern. We report a case of metaplastic breast carcinoma (MBC) in whom fine-needle aspiration (FNA) cytology was performed with later histological confirmation. The(More)