title: Haemorrhage responsive to vitamin K in a 6-week-old infant.
abstract: A 6-week-old breast-fed infant presented with vomiting, jaundice, and irritability. Haemorrhage occurred after lumbar puncture, and a coagulation abnormality which responded to vitamin K was found. It would seem prudent to estimate the prothrombin time before invasive procedures in breast-fed infants of this age, or to give vitamin K to such infants when doubt exists about previous vitamin K administration.
mesh_terms: D006801:Humans; D007223:Infant; D008297:Male; D014812:Vitamin K / Q000627:therapeutic use*; D014813:Vitamin K Deficiency / Q000150:complications; D006475:Vitamin K Deficiency Bleeding / Q000188:drug therapy* / Q000209:etiology
chemical_list: D014812:Vitamin K