A Combined Spindle Cell Melanoma and Sarcomatoid Squamous Cell Carcinoma: A Rather Unique Squamomelanocytic Tumor.

Squamomelanocytic tumor is a poorly defined term that indicates co-occurrence of malignant melanoma and squamous cell carcinoma within the same lesion. We present an unusual case of squamomelanocytic tumor in which both intermingling components showed predominantly spindle cell morphology and were confirmed with double staining for SOX-10 and AE1/AE3.