A benign soft tissue tumor of peripheral nerve origin. Tumor is formed of irregular and short bundles of proliferating spindle cells with separating abundant stroma. Stroma shows short collagen bundles (shredded carrots appearance) and in many foci it is loose and edematous. Skin is acanthotic. No evidence of malignancy and excision of lesion looks complete.
Back mass at the left shoulder.
Partially skin covered rubbery nodule measured 1.7x1.5x1.3 cm, having grayish tan cut section, totally embedded.
Back mass, excision: