Persistent reaction in paucibacillary leprosy: case reports.

Three patients of histopathologically confirmed borderline-tuberculoid leprosy showing no acid-fast bacilli and with lesions confined to the face, 2 on the cheek and 1 on the forehead, were given multidrug therapy as recommended by the WHO for paucibacillary cases. Within 3 months the lesions showed signs of upgrading (or reversal) reaction which was substantiated by histopathology. In 1 patient the facial nerve was affected leading to facial palsy. The lymphocyte transformation test did not show a significant rise. All 3 patients were given oral prednisolone for periods varying between 5 and 7 months, but the response was poor except in 1 patient in whom the facial palsy responded favourably. Injections of sodium antimony gluconate tried in 1 patient after stoppage of steroids did not control the reaction. After 18 months of regular follow-up during therapy, the cutaneous reaction in the patient with facial nerve involvement subsided leaving significant atrophy. However, in the other 2 patients the skin lesion persisted with clinical and histopathological evidence of upgrading reaction. The reasons for the unnatural persistence of reaction in these patients is not clear.