Campomelic dysplasia is a very rare disorder characterised by a variable association of skeletal abnormalities (bowed and fragile long bones, pelvis and chest abnormalities, eleven rib pairs instead of the usual twelve), and extraskeletal abnormalities (facial dysmorphology, cleft palate, sexual ambiguity or sex reversal in two thirds of the affected boys, and brain, heart and kidney malformations).

Hydrocephalus is an active distension of the ventricular system of the brain resulting from inadequate passage of CSF from its point of production within the cerebral ventricles to its point of absorption into the systemic circulation.