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Biomedical subjects

G W Sypert

Publications and source records attributed to G W Sypert.

81 records · Page 5Linked to original sources

Combined cranio-orbital surgery for extensive malignant neoplasms of the orbit.

Extensive, invasive neoplasms of the cranio-orbital region are generally considered to be inoperable and are treated with local radiation therapy and occasionally with chemotherapy. Upon local recurrence of these neoplasms, further treatment efforts are usually deemed futile. Over the past 4 years, 10 patients with extensive neoplasms of the cranio-orbital region that were previously thought to be inoperable were referred to us for further evaluation. Five of these patients had failed an intensive course of radiation therapy. Radical regional cranio-orbital resection was performed. The resection included the skin, globe, sphenoid wings, and orbitofrontal bone. The maxillary sinus and nasal septum were left exposed. The exposed dura mater and the frontal and temporal bones were resurfaced with split-thickness skin grafts. All patients in this series have survived free of local disease to date. Combined cranio-orbital resection offers both palliation and a possible cure for patients with extensive, invasive neoplasms of the cranio-orbital region. Reconstructive surgery can be performed using full-thickness flaps after 2 years of observation for local recurrence.

Adolescent↗

Melanotic schwannoma.

Reports of melanotic nerve sheath tumors of Schwann cell origin are rare, only three having been found in the literature. Two new cases of spinal intradural melanotic nerve sheath tumors are reported and the literature is reviewed. Controversy has arisen in regard to the origin of melanin within these tumors. Electron microscopic study of one of our cases indicates that the Schwann cell is capable of producing melanin. The available evidence suggests that ultrastructural identification of the cell type in these pigmented tumors is essential in plotting the therapy and prognosis of patients with melanotic nerve sheath tumors.

Adult↗