NCIt definition : A very rare malignant dermal tumor of uncertain differentiation that morphologically
overlaps with clear cell sarcoma, exhibits partial melanocytic differentiation, and
is characterized by the presence of CRTC1-TRIM11 gene fusion. It is composed of epithelioid
to fusiform cells with pale cytoplasm and vesicular nuclei. It appears to behave less
aggressively than melanoma and clear cell sarcoma, and only a minority of the published
cases have shown regional or distant metastasis.;