Vitamin K deficiency

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Summary of Vitamin K deficiency

Vitamin K deficiency is a form of avitaminosis resulting from insufficient vitamin K1 or vitamin K2 or both. Symptoms include bruising, petechiae, hematomas, oozing of blood at surgical or puncture sites, stomach pains, risk of massive uncontrolled bleeding, cartilage calcification, and severe malformation of developing bone or deposition of insoluble calcium salts in the walls of arteries. In infants, it can cause some birth defects such as underdeveloped face, nose, bones, and fingers.

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Vitamin K deficiency

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Vitamin K deficiency

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A 21-day-old infant is brought to the emergency department because of lethargy. Mother says that she has been eating less for the past few days. This morning, the mother found her daughter difficult to arouse. Patient's birth was carried out at home and was a spontaneous vaginal delivery without complication. The mother refused immunizations for her child. The daughter's temperature is 35.8°C (96.44°F), pulse is 81/min, respirations are 25/min, and blood pressure is 71/46 mm Hg. Physical examination shows diffuse petechiae and bruising. Which of the following is the most likely diagnosis?

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