Primary cutaneous mucormycosis caused by Mucor irregularis.

We describe a case of primary cutaneous mucormycosis in a 44-year-old man with an 18-month history of infiltrative erythematous plaques and haemorrhagic crusting on the dorsum of his left hand. The isolate was identified as Mucor irregularis (formerly Rhizomucor variabilis) based on the fungus morphology and DNA sequencing results. Improvement was observed after a 6-month treatment course of itraconazole. No recrudescence was seen during a follow-up of 23 months after treatment.

Hypothyroidism-related onycholysis with Aureobasidium pullulans colonization successfully treated with antifungal therapy.

This is a report, the first to my knowledge, of secondary nail-apparatus involvement by Aureobasidium pullulans in a patient with onycholysis related to hypothyroidism. Complete cure of the lesions was seen after 2 weeks of itraconazole and 2 months of local bifonazole therapy. This case raises concern about the extent of involvement of this yeast in onycholysis of diverse clinical aetiologies.

Erysipeloid.

We report a case of erysipeloid in a 73-year-old woman. The disease was characterized clinically by erythematous and erosive lesions on three fingers of the left hand. Diagnosis was made based on the patient's occupation (housewife), history of previous traumatic contact with a scorpion fish, typical inflammatory lesions located on one hand, lack of severe systemic features, mild laboratory abnormalities and rapid remission after specific treatment.

[Diagnostic image (267). A man with a painful ulcer on the finger]. / Diagnose in beeld (267). Een man met een pijnlijk ulcus op de vinger.

A 28-year-old man presented with severe ulceration on the right middle finger and erythematous nodules on the forearm due to infection with Mycobacterium marinum after cleaning an aquarium.

A Case of Fingernail Onychomycosis due to Aspergillus flavus.

A 56-year-old woman on insulin therapy for diabetes visited our clinic due to whitish discoloration on the right index finger. Despite topical application of 1% lanoconazole solution, the lesion grew, causing paronychia. Direct microscopy revealed non-dermatophyte molds. Based on the morphological features and genetic analysis of the isolate, the pathogen was identified as Aspergillus flavus. The patient was diagnosed with proximal subungual onychomycosis due to A. flavus. Following itraconazole pulse therapy, she was cured in 6 months. To our knowledge, this is the first reported case of fingernail onychomycosis due to A. flavus in Japan.

Trichosporon beigelii infection presenting as white piedra and onychomycosis in the same patient.

Trichosporon beigelii is a fungal organism that causes white piedra and has occasionally been implicated as a nail pathogen. We describe a patient with both hair and nail changes associated with T. beigelii.