Histological evaluation of the spleen after acute bleeding followed by blood replacement with two different physiologic solutions M. Cabral * , A. L. Ortiz, C. Venâncio, J. Objective: Chondromyxoid fibroma is a rare benign lesion accounting for less than 0.5 % of all primary neoplasms of bone. A study was conducted to assemble a national study group for rare entities and share the experience of different centers.