title: Christmas disease: (factor IX deficiency) as a cause of shunt obstruction.
mesh_terms: D002543:Cerebral Hemorrhage / Q000209:etiology; D002557:Cerebrospinal Fluid Shunts / Q000009:adverse effects*; D002836:Hemophilia B / Q000150:complications* / Q000235:genetics; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology / Q000601:surgery*; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000601:surgery*; D008297:Male