Related Experiment Video
Updated: May 23, 2026
Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
Published on: August 9, 2024
Epidermal choristoma arising on the midline gingiva as a congenital epulis: a case report
Izumi Yoshioka1, Kousuke Marutsuka, Kaori Igawa
1Division of Oral and Maxillofacial Surgery, Department of Sensory and Motor Organs, Faculty of Medicine, Miyazaki University, Kihara 5200, Kiyotake, Miyazaki, Japan. yizumi@fc.miyazaki-u.ac.jp
Abstract:
We report an extremely rare case of epidermal choristoma in the midline of the maxillary gingiva. A 2-month-old Japanese boy presented with a polypoid mass in the midline of the maxillary gingiva. The initial clinical diagnosis was congenital epulis. Microscopic examination revealed a granular cell layer and melanin pigmentation within the basal cell layer. Furthermore, sebaceous glands and hair follicles were observed within the connective tissue. The histological diagnosis was therefore epidermal choristoma, based on clinical microscopic observations.
Related Concept Videos
01:19Clinical Applications of Epidermal Stem Cells
01:11Papillary Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen and...