Lupus vulgaris is a form of cutaneous tuberculosis (CTB) caused by Mycobacterium tuberculosis (MTB). It is characterized by a usually solitary, long-lasting skin lesion that most commonly develops on the head or neck, especially the nose, cheek, earlobe, or scalp.

A 69-year-old elderly, Filipino female presented with a 20-year history of progressively growing erythematous ulcerative plaques on the right arm and ear, with associated mild pruritus and pain. She appeared to be immunocompetent and had no clinically apparent underlying focus of TB infection. Tuberculin skin test (TST) showed a positive reaction and histopathologic examination revealed a chronic granulomatous dermatitis that is focally positive for acid-fast bacilli (AFB). She was given anti-koch’s therapy with subsequent resolution of the lesions.

The case report presents a rare instance of lupus vulgaris (LV) in a Filipino woman, characterized by large, ulcerative plaques on her body with no apparent infection source, emphasizing the need for early detection and Quantiferon-TB Gold (QFT-G) testing for diagnosis.