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R R Rickert

Publications and source records attributed to R R Rickert.

53 records · Page 3Linked to original sources
PubMedDate not supplied

Malignant parapharyngeal schwannoma (neurilemmoma).

A malignant parapharyngeal neurilemmoma developed in a 45-year-old woman who had had a benign solitary neurilemmoma removed from the same area nine years previously. Incomplete excision was achieved through a mandibulotomy approach. Malignant schwannoma usually is associated with neurofibromatosis and has a poor prognosis, spreading along the nerve of origin or by blood stream. Small localized tumors should be treated aggressively by surgery. The possibility that a previously benign schwannoma underwent malignant transformation must be considered.

Adult↗
PubMedDate not supplied

Pigmented villonodular synovitis of the temporomandibular joint.

A 39-year-old woman had a large asymptomatic left parotid mass that she had apparently not noticed. The clinical appearance suggested a parotid tumor. Aspirated tissue revealed numerous giant cells, histiocytes, and hemosiderin pigment. At surgical exploration a tumor was found deep to the facial nerve involving the temporomandibular joint, which had a brown-stained roughened synovial membrane. The resected specimen histologically was a proliferative lesion composed of epithelioid histiocytes, spindle cells, and multinucleated giant cells. The appearance was typical of the family of lesions that includes pigmented villonodular synovitis, bursitis, and tenosynovitis (giant cell "tumor" of tendon sheath). In view of the origin from the temporomandibular joint, reinforced by a characteristic radiologic appearance, we interpret this as a case of pigmented villonodular synovitis. This is the fifth case reported from this site.

Adult↗
PubMedDate not supplied

Bowen's disease.

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Arsenic Poisoning↗