Andrea Zaenglein

Are You Confident of the Diagnosis? Pilomatricomas were originally described by Malherbe and Chenantais in 1880 as calcifying epithiomas and thought to be of sebaceous gland origin. In 1905, Malherbe reexamined the tumors, determined the origin to be hair matrix cells and suggested the term pilomatrixomas. Today both terms are used interchangeably throughout the literature.…

Are You Confident of the Diagnosis? Perianal streptococcal disease (PSD) is a localized cutaneous infection caused by group A ß-hemolytic Streptococcus. Key characteristics on history and physical examination should alert the practitioner to this entity. The rash is typically very bright pink-red and often waxes and wanes in severity and is associated with localized pruritus.…

Are You Confident of the Diagnosis? Acne is an exceptionally common disorder in adolescents, affecting up to 85% of 12-24–year olds. In fact, most patients can accurately diagnose themselves. The presence of inflammatory papules and pustules along with comedones, involving the face, chest, shoulders and back, are hallmarks of acne vulgaris. Nodules and nodulocystic lesions…