Korean J Pathol.  1987 Dec;21(4):308-316.

Congenital Melanocytic Schwannoma in Ankle Joint Potentially Malignant: A case report

• Park JT
• Park CS
• Juhng SW
• Cho KH

Abstract

Congenital malignant melanocytic schwannoma in ankle joint was not reported on literature and it was a very interesting case. Light microscopically, melaninladen cells were mixed in abundant wavy spindle cells, some mitotic cells were also observed. Ultrastructurally, melanosomes in variable stages of development were scattered in the cytoplasm which had basal lamina. Collagen bundles were abundant in the intercellular connective tissue. It was histologically malignant tumor and clinically recurred. But in non-congenital potentially malignant melanocytic schwannoma which had been reported, reccurrence or distant metastasis were not noted. So, further clinical survey may be necessary for evaluation of the malignant behavior of this neoplasm.

Keyword

Schwannoma; Congenital; Melanocytic; Ankle

MeSH Terms

Ankle Joint*
Ankle*
Basement Membrane
Collagen
Connective Tissue
Cytoplasm
Melanosomes
Neoplasm Metastasis
Neurilemmoma*
Collagen