An Uncommon Clinical Patterns of Proximal Subungual Onychomycosis Caused by Penicillium rubens

Xian Dong,1 Liqiong Luo,2 Wei Zhang1 1Department of Dermatology, the Affiliated Hospital of Guizhou Medical University, Guiyang, People’s Republic of China; 2Department of Dermatology, the First People’s Hospital of Fuquan City, Fuquan, People’s Republic of ChinaCorrespondence: Wei Zhang, Department of Dermatology, the Affiliated Hospital of Guizhou Medical University, No. 28 Guiyi Street, Guiyang, Guizhou, 550001, People’s Republic of China, Email [email protected]: Proximal subungual onychomycosis (PSO) is a rare type of onychomycosis, which is commonly seen in patients with compromised immune systems. The pathogens include Trichophyton rubrum, Microsporum canis, Fusarium species, Aspergillus brasiliensis, Trichophyton erinacei, Aspergillus niger, and Aspergillus flavus. Onychomycosis caused by Penicillium is rarely reported. We report a rare clinical manifestation of proximal subungual onychomycosis caused by Penicillium rubens in an immunocompetent individual.Keywords: proximal subungual onychomycosis, penicillium rubens