Self-induced nasal ulceration from trigeminal trophic syndrome.

Trigeminal trophic syndrome is a rare entity characterized by the presence of ala nasi ulceration, trigeminal anesthesia, and paresthesia. It arises secondary to trigeminal nerve injury. Patients with this diagnosis often undergo repeated skin biopsies to rule out suspected nonmelanoma skin cancer due to the clinical appearance.

Treatment of Nevus comedonicus with topical tazarotene and calcipotriene.

Nevus comedonicus is a rare developmental defect of the pilosebaceous unit. It is also thought to be a variant of epidermal nevus. Previously reported treatments include surgical excision, CO2 laser, dermabrasion, extraction, topical retinoic acid, and numerous topical keratolytics.