John Lennon Silva Cunha, Clenia E S Andrade, Fernando A P da Cunha Filho, Alexandre R da Paz, Manuel A Gordón-Núñez, Pollianna M Alves, Cassiano F W Nonaka
The intratarsal keratinous cyst (IKC) is a recently described entity, often clinically misdiagnosed as a chalazion. We report a case of a 61-year-old male patient with a chief complaint of a small lesion on the upper eyelid that evolved over six months. On physical examination, an asymptomatic, firm nodule was identified on the left upper eyelid. The patient reported no history of trauma. A provisional diagnosis of chalazion was established, and an excisional biopsy was performed. Histopathologically, the lesion was lined with a stratified squamous epithelium, with a corrugated epithelial surface showing abrupt keratinization without keratohyalin granules, and compact keratinous-appearing material in the cystic lumen...
April 19, 2024: Dermatopathology (Basel, Switzerland)