Subungual Keratoacanthoma: Typical and Atypical Presentations of an Uncommon Nail Tumor.

Introduction: Keratoacanthoma (KA) is a group of tumors of epidermal origin with controversial nature. Subungual keratoacanthoma (SUKA) is a rare and destructive variant with more aggressive behavior. SUKA appears as a rapidly growing, painful tumor beneath the nail plate that rapidly progresses to a mass that can measure up to 2 cm.

Trigeminal Trophic Syndrome as a Complication of Herpes Zoster Ophthalmicus.

Trigeminal trophic syndrome (TTS) is an unusual complication that occurs secondary to trigeminal nerve injury. The insult to the nerve can lead to anesthesia, hypoesthesia, and paresthesias producing sensations such as burning or itching. The combination of both leads to repeated self-inflicted skin trauma in an attempt to alleviate these sensations, eventually leading to ulceration of the skin.