Total colonic aganglionosis associated with interstitial deletion of the long arm of chromosome 10

We present the case of a patient with total colonic aganglionosis and small-bowel involvement (TCSA) associated with a 46, XX, del 10 (q11.21 q21.2) karyotype. Seromuscular biopsies were taken from the rectum, colon, cecum, and terminal ileum. The alpha-naphthylesterase technique was applied to demonstrate intestinal ganglia of the myenteric plexus. The patient did not have associated anomalies. The association of TCSA with 10 long-arm interstitial deletion has not been reported in the literature. Molecular studies in cases of TCSA might reveal whether chromosome 10 plays a role in the pathogenesis of the disease.