Latrogenic implantation of malignant meningioma to the abdominal wall

We report a case of malignant meningioma that occurred in the abdominal ope ration scar of a 71-year-old woman. This tumor was a 13x8 cm gray-tan soft tumor, consisting of multiple nodules. Histologically, tumor cells prolifer ated in the subcutaneous tissue, displaying mostly a storiform pattern and a focal whorl formation with high mitotic figures. The immunohisto-chemical positivity for epithelial membrane antigen and negativity for CD34 enabled us to differentiate this tumor from a dermatofibroma protuberance or heman giopericytoma. The patient had a history of operation for a recurrent orbit al lesion of a malignant meningioma that initially developed in the frontal skull base. The present case probably resulted from iatrogenic transplanta tion of the orbital malignant meningioma to the lower abdominal wall, which had served as a donor site for adipose tissue used to pack the orbital def ect.