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Biomedical subjects

H Witschel

Publications and source records attributed to H Witschel.

At least 91 records · Page 5Linked to original sources
PubMed1976

Choroidal leiomyoma of vascular origin.

A 57-year-old man had a clinically suspected malignant melanoma in his left eye. On microscopic study, the enucleated eye harbored an unusual choroidal tumor that had extended extraocularly. This tumor had been variously interpreted microscopically as an angiosarcoma, an atpical angioma, a glioma, or a neurilemoma. Electron microscopic examination of deparaffinized tissue established the smooth muscle nature of the tumor cells as well as the presence of numerous pericytes associated with conspicuous vascular channels. This unique myogenous tumor of the choroid probably had a vascular origin.

Choroid Neoplasms↗
PubMed1975

[Metastases of the choroid of the bronchial carcinoma (author's transl)].

Clinical and histopathological findings are described in 6 cases of chronchial carcinoma metastatic to the choroid of the eye. These findings show that especially in bronchial carcinoma, metastases of the choroid often are the first symptoms of the disease even before the primary site of the tumor is recognized. As these metastases often grow in a manner quite different from that of other uveal metastases, they are likely to be mistaken for uveal melanomas. Yet the right diagnosis is decisive for the right therapy. While in case of melanoma the eye has to be enucleated, x-ray therapy should be employed in metastatic carcinoma. Thus the patient can be prevented from becoming blind and from enucleation. The effect of x-ray treatment on the carcinoma cells in the choroid is demonstrated histologically in one of the cases.

Adult↗