Annular Lichen Scrofulosorum ? An Unusual Presentation of Micropapular Tuberculid

Cutaneous tuberculids are rare manifestations of systemic tuberculosis mainly seen in children and young adults, having high degree of cellular immunity to mycobacterium tuberculosis. It is usually seen with underlying occult tuberculosis of lungs, lymph nodes, bones or after tuberculosis vaccination. It is clinically characterized by perifollicular multiple grouped or annular Micropapular eruption, predominantly over the trunk and limbs. A high index of suspicion is needed in endemic areas, as the condition imitates with many common cutaneous diseases. We herein, report a rare case of large annular lichen scrofulosorum, which is a rare morphological pattern of lichen scrofulosorum. Complete clearance of lesions was witnessed after a short course of anti tuberculous therapy.