system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 36 year–old factory worker developed itchy, annular scaly plaques in both groins. Application of a corticosteroid ointment led to temporary relief but the plaques continued to extend at the periphery.The most likely diagnosis is –
assistant
The correct answer is  Tinea cruiris is dermatophytic infection of groin. Presence of bilateral, annular scaly plaques in the groin, itching and unresponsiveness to steroids and peripheral extension, all suggest the diagnosis of Tinea cruris.