A brown tumor after biliopancreatic diversion for severe obesity. by Benhalima, K, Katrien, B, Mertens, A, Ann, M, Van den Bruel, A, Annick, V, Laga, K, Katrien, L, Vanderschueren, D, Dirk, V, Samson, I, Ignace, S, Van Damme, B, Boudewijin, V, Bouillon, R, Roger, B