Lipoblastomatosis: ultrastructure of two cases and relationship to human fetal white adipose tissue.

Two cases of lipoblastomatosis were examined by electron microscopy. In each there was a spectrum of adipose cell differentiation from mature adipocytes to undifferentiated mesenchymal cells. The cells had various shapes and were loosely related to one another and to small blood vessels in a stroma containing sparse collagen and proteoglycan granules.

Xanthogranulomatous cystitis.

Xanthogranulomatous lesions have been reported in many anatomical sites but only 10 cases involving the bladder have been described, 7 of which were associated with urachal adenoma. To our knowledge, we report the first instance of xanthogranulomatous cystitis in the English literature.

Uterine tumor resembling an ovarian sex-cord tumor: report of a case of an endometrial stromal tumor with foam cells and ultrastructural evidence of epithelial differentiation.

Uterine tumors resembling ovarian sex-cord tumors are of uncertain histogenesis. We report such a neoplasm in which epithelial features observed by light microscopy were confirmed by electron microscopy and in which foam cells resembling those present in the stroma of hyperplastic endometria and in carcinoma represented a conspicuous intrinsic component. The lesion is interpreted as arising from endometrial stroma or multipotential uterine mesenchyme that has differentiated toward endometrial stroma and epithelium.

The clinical and histologic spectrum of endometrial stromal neoplasms: a report of 41 cases.

Clinical and pathological features of 41 homologous uterine stromal tumors classified by the criteria of Norris and Taylor were reviewed. These included stromal nodules (12 cases), endolymphatic stromal myosis (20 cases), and stromal sarcoma (nine cases). Patients ranged in age from 18 to 79 with a median of 45 years.

Pedunculated liposarcoma of the esophagus: a first case report.

A large pedunculated myxoid liposarcoma of the cervical esophagus is presented. Because of its long pedicle, the presenting symptoms were primarily respiratory rather than digestive. The tumor lent itself to local excision rather than esophageal resection, given the absence of involvement of its pedicle and the resultant wide margin of excision.