The frequency of complication of diabetes mellitus in patients with pulmonary tuberculosis is
high. Lupus vulgaris is a progressive form of cutaneous tuberculosis that occur in a patient
with moderate or high degree of immunity. Cutaneous tuberculosis is an infrequent first sign of
disseminated tuberculosis. Cutaneous tuberculosis in immunocompetent diabetic patient
should be considered as a D/D of cutaneous abscess or ulcers due to fungal infection and tuberculoid.
PCR is an efficient and sensitive method for the diagnosis of cutaneous tuberculosis.