title: Pseudomonas chromonychia.
abstract: The patient reported on herein presented with a greenish black great toenail. The discoloration was due to Pseudomonas aeruginosa. This report should alert the practitioner to the fact that Pseudomonas chromonychia may occasionally be mistaken for color changes produced by subungual hematomas, nevi, or malignant melanomas.
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D009260:Nail Diseases / Q000209:etiology*; D010859:Pigmentation Disorders / Q000209:etiology*; D011552:Pseudomonas Infections / Q000175:diagnosis*