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Tinea genitalis profunda caused by Microsporum canis: A case report and literature review

Summary

A 23-year-old woman developed a severe fungal infection in her genital area caused by a fungus typically found in dogs. The infection initially appeared bacterial and did not respond to antibiotics. Fungal cultures identified Microsporum canis, which was successfully treated with oral antifungal medications, though the patient experienced some scarring and pigmentation changes.

Background

Deep dermatophytosis in the genital region is rare and often misdiagnosed due to its inflammatory presentation mimicking bacterial infections or other dermatoses. Tinea profunda encompasses deep dermatophyte infections extending into the dermis and subcutaneous tissue, including kerion and Majocchi granuloma variants.

Objective

To report a case of tinea profunda caused by Microsporum canis in the pubogenital region and review the diagnostic and therapeutic challenges associated with deep dermatophytic infections in atypical localizations.

Results

Fungal culture identified Microsporum canis as the causative agent. Initial antibiotic therapy failed to improve the condition. Systemic terbinafine for 8 weeks followed by itraconazole for 4 weeks led to marked regression of lesions with residual post-inflammatory hyperpigmentation and localized scarring alopecia.

Conclusion

This case illustrates the diagnostic complexity of tinea profunda in atypical locations and emphasizes the importance of fungal cultures in refractory dermatoses. Early mycological investigation and appropriate antifungal therapy are essential to prevent misdiagnosis and long-term sequelae.
  • Published in:Medical Mycology Case Reports,
  • Study Type:Case Report,
  • Source: PMID: 41079971, DOI: 10.1016/j.mmcr.2025.100738
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