Affiliation:
1. Department of Emergency and General Medicine, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
Abstract
An 80-year-old man developed asymptomatic black discoloration of the dorsal surface of his tongue 1 week after hospitalization for surgical and antibiotic treatment of septic arthritis of the shoulder. He reported no prior lingual discoloration and did not smoke cigarettes, use chewing tobacco or illicit drugs, or drink alcohol. What is the diagnosis and what would you do next?
Publisher
American Medical Association (AMA)