A case of BCG-related lymphadenitis is presented. After BCG vaccination, an enlarging mass was noted in the left axillary region of a 1-year-old boy. Imprint smear cytology of the extirpated lesion revealed aggregates of epithelioid and tingible-type histiocytic cells without a necrotic background. Histologically, the lesion showed granulomatous nodules composed of epithelioid histiocytic cells and Langhans' giant cells without associated caseous necrosis. Immunohistochemically, the epithelioid histiocytic cells were positive for and-BCG antibody, lysozyme and CD 68. It is necessary to distinguish this BCG-related lymphadenitis from tuberculous lymphadenitis.
