Lupus vulgaris is a cutaneous form of tuberculosis, which may persist for years unless treated. This is a relatively rare condition, the diagnosis of which can be challenging especially when it presents in areas that are not common predilection sites. In the western region, it is more often seen on the head and neck. Among Asians, it is more often seen on the trunk, knees, and elbows. It rarely occurs on the arms and legs. This is a case of a 55-year old Filipino woman with a solitary non-pruritic, non-tender, erythematous to dusky red plaque on the left anterior leg, which elicited an "apple-jelly" color on diascopy. Skin punch biopsy revealed granulomatous dermatitis. Purified protein derivative (PPD) and interferon-gamma release assay (Quantiferon TB-Gold) tests revealed positive results for tuberculosis infection. Based on morphology and laboratory results, she was diagnosed to have lupus vulgaris and was enrolled under the Department of Health's Tuberculosis-Directly Observed Treatment Short-course Program (TB-DOTS), and was treated successfully.