Perforating granuloma annulare mimicking papulonecrotic tuberculid

Area of Science:

• Dermatology
• Infectious Diseases
• Pathology

Background:

• Tuberculosis can manifest with diverse cutaneous findings.
• Papulonecrotic tuberculid is a recognized tuberculid reaction pattern.
• Perforating granuloma annulare is a distinct dermatological condition.

Observation:

• A case study involving a patient with concurrent lymph node tuberculosis and specific cutaneous lesions.
• The lesions histologically presented as perforating granuloma annulare.
• These lesions clinically mimicked papulonecrotic tuberculid.

Findings:

• The patient's condition, characterized by lymph node tuberculosis and perforating granuloma annulare-like lesions, responded well to antituberculous therapy.
• This case represents a potential association between tuberculosis and perforating granuloma annulare.
• Histopathological findings confirmed perforating granuloma annulare, distinct from typical tuberculid morphology.

Implications:

• Perforating granuloma annulare should be considered in the differential diagnosis of papulonecrotic tuberculid, especially in endemic tuberculosis areas.
• This association raises the hypothesis that perforating granuloma annulare might represent a variant of tuberculid reaction.
• Further research is warranted to elucidate the pathogenetic link between tuberculosis and this specific skin manifestation.