[A case of late neonatal hemorrhagic disease associated with intolerance for cow's milk proteins].

: The authors describe a two months aged patient affected by cow's milk protein intolerance (CMPI) with serious haemorrhagic manifestations. As blood coagulative laboratory findings demonstrated a prolongation of P.T. and P.T.T. with a marked reduction of vitamin K-dependent factors only, the authors believe these bleeding manifestations secondary to a case of late haemorrhagic disease of the newborn. Vitamin K treatment determined a rapid normalization of haemorrhagic symptoms and laboratory clotting tests, without any alteration of these ones during the patient's follow-up too. The authors suggest that blood coagulative pattern must be investigated in all CMPI cases, especially in the ones with a precocious onset of clinical symptoms. In the cases with vitamin K-dependent factors deficiency the treatment is immediately necessary, while in other cases a daily dietary supplementation or a vitamin K weekly or monthly injection could be enough in order to prevent any further vitamin K-dependent factors deficiency.