Well-differentiated malignant cylindroma with partially preserved hyaline sheaths. A locally invasive neoplasm?
Light microscopic and ultrastructural features of a well-differentiated malignant cylindroma are described. The tumor was locally invasive but it neither recurred nor metastasized during the 3 years after surgery. This fact, together with the similar biologic behavior of two previously described, well-differentiated malignant cylindromas, suggests that these tumors possess either low or no metastatic potential.
Donner
L R
LR
Department of Surgical Pathology, Scott & White Clinic, Temple, TX 76508, U.S.A.
Ruff
T
T
Diaz
J A
JA
D000236:Adenoma / Q000473:pathology*; D000368:Aged; D000369:Aged, 80 and over; D002356:Cartilage / Q000473:pathology; D004424:Ear Canal / Q000473:pathology; D004428:Ear Neoplasms / Q000473:pathology; D005152:Facial Muscles / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006818:Hyalin / Q000648:ultrastructure*; D019042:Muscle Neoplasms / Q000473:pathology; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local; D010307:Parotid Neoplasms / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology*