Atypical vascular lesions (AVLs), first described by Rosen and Fineberg in 1994, arise as solitary or multiple papules in the mammary or chest wall skin within the irradiated field, several years after radiotherapy. Histologically, they mimic low grade angiosarcoma, but they show benign biologic behavior. Two cases of AVLs are presented because of their rarity. The special features of these lesions are useful for their differentiation from low grade angiosarcoma.

Key words: Atypical vascular lesions, breast, radiotherapy.

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