Spindle cell lipoma: a benign lipoma variant with potential hazards of diagnostic misinterpretation

Spindle cell lipoma is a relatively common, recently described benign lipoma variant. It demonstrates highly characteristic clinical and pathologic features. Knowledge of its existence and features should prevent any misinterpretation of its true benign biologic behavior, a pitfall which has unfortunately occurred in the past, resulting in poor prognosis and exaggerated modes of therapy.