Silva Molano, Raúl FernandoPedraza Ordóñez, Francisco JavierSaltarén Gallego, Isabel Cristina2012-04-272012-04-2720101794-4449http://hdl.handle.net/10567/209Pectus excavatum is a congenital deformity, characterized by a collapse in the caudal portion of the sternum which compromises organs from the thoracic cavity. A case is reported in a three months old mongrel cat diagnosed at Hospital Veterinario de la Universidad de Caldas in Manizales, Colombia. The animal lost sensibility in its hind legs and had muscular atrophy among other signs of neurological malfunction. Externally, it had an acute collapse of the sternum and the costal arch. The radiographic study of the thorax confirmed the sternum’s deformity and the thoracolumbar vertebrae damage. It was also useful to measure the frontal sagital and vertebral indexes. The results showed pectus excavatum and lordosis in vertebral bodies that caused neurological signs because of a medullar injury between the T 2 and L 4 segments. Given the severity of the disease, euthanasia was made to the cat and the necropsy revealed a displacement of internal organs towards the caudal, irregular ribs and two big collapses in the sternum. The costal arch was deviated to the outside describing a bell form. The lungs had emphysema and hepatic type hemorrhages. This case is described because of its rare occurrence and, with the revision made, a contribution to itesMalformación congénitaCorporación Universitaria LasallistaPectus excavatumEsternónCaja torácicaFelinosArticle