Malignant rhabdoid tumor beside benign skin mesenchymal neoplasm with myofibromatous features

Only a few reports of primary cutaneous rhabdoid tumors have been published . We describe the case of a S-month-old female patient who developed a rhab doid type cutaneous sarcomatoid neoplasm in her upper back, close to a beni gn myofibromatous proliferation of infancy. The lesion was studied both by light microscopy and immunohistochemically. Flow cytometry was performed sh owing a DNA diploid profile of the malignant tumor. The pathological findin gs suggest a mesenchymal origin (hemangiopericytic or myofibroblastic type) for both tumors. The patient was surgically treated, but she died nine mon ths later.