(A) The tumor is composed of a cellular mass of malignant cells that are unconnected to the epidermis.
(B) Highly pleomorphic spindle cells are present with some multinucleated giant cells and scattered mitoses, including atypical forms.
Reproduced with permission from: Beer TW, Lam MH, Heenan PJ. Tumors of fibrous tissue involving the skin. In: Lever's Histopathology of the Skin, 10th ed, Elder DE, Elenitsas R, Johnson B Jr, et al (Eds), Lippincott Williams & Wilkins, Philadelphia 2009. Copyright © 2009 Lippincott Williams & Wilkins.
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