Related Experiment Video
Updated: Jun 15, 2026

Implantation and Evaluation of Melanoma in the Murine Choroid via Optical Coherence Tomography
Published on: December 2, 2022
[Melanonychia: The purpose of a case of ungual mycotization mimicking melanoma]
Lívia Martins Veloso de Carvalho1, Ignez Mendonça, Jeferson Carvalhães de Oliveira
1Serviço de Dermatologia - Fundação Técnico-Educacional Souza Marques - CERPU-Centro de Referência em Patologia Ungueal, Hospital Mário Kröeff. liviamvcarvalho@gmail.com
Introduction:
Phialophora sp. dematiaceous fungus frequently isolated from soil and organic debris from animals and plants. There have been no reports of nail involvement caused by this fungus. We report the case of a 77-year-old male with blackish-brown pigmentation involving a single finger for one year. The identification of the fungus was determined by macromorphological and micromorphological study of the colony and we discuss the clinical, microbiological, differential diagnosis, and treatment.
Comment:
We describe the first case of nail infection caused by Phialophora sp.
Related Concept Videos
Skin Cancer
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Accessory Structures of the Skin: Nails
The main components of a nail include the following.
Nail Plate: The nail plate is the visible portion of the nail that extends beyond the fingertips or toes. It is a hard, translucent...
Pigmentation
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...

