One of the side effects of the BCG vaccine is a local infection that may spread to the regional lymph nodes causing lymphadenitis, which can resolve spontaneously without treatment. We report the case of an immunocompetent infant who developed lymphadenitis after administration of the BCG vaccine, complicated with persistent symptomatic hypercalcemia in spite of the usual treatment including corticotherapy. Antituberculous treatment was necessary to reduce this hypercalcemia.