MEN1 and Angiofibromas: Angiofibromas, collagenomas, and lipomas are among the skin lesions that may occur in patients with MEN1 [13]. In a 1997 study concerning skin lesions in MEN1, angiofibroma was found to be the most common cutaneous manifestation with a prevalence of 88% of patients with MEN1 and was most often located on the face.