Lichen scrofulosorum

Abstract

A 9-year-old boy presented with asymptomatic, skin colored, grouped papules with mild scaling on elbows, buttocks, knees, and dorsa of feet in a bilateral symmetric manner for 8 months (Fig. 1). There were no systemic features and boy appeared otherwise healthy. Family history was non-contributory. Mantoux text was positive (20 X 24 mm); routine blood investigations, chext X-ray and abdominal ultrasonography were normal. Histopathological findings were consistent with lichen scrofulosorum (Fig. 2). He showed almost complete resolution of lesions after four months of anti-tubercular therapy.

Cutaneous tuberculosis in the pediatric population: A review

“… 58 Lesions typically occur in a bilateral and symmetrical distribution on the trunk and lower extremities. 59 Cervical lymphadenopathy may also be appreciated. 60 Histologically, granulomatous inflammation without caseation with a parakeratotic epidermis may be appreciated, but no AFB will be seen with staining.…”

“… 60 , 61 TST is positive. 59 Anti-tuberculosis drugs for 6 months is the standard of care. 60 Lesions resolve in 8-12 weeks on average without scarring.…”