Abstract
Patients with anorexia nervosa (AN) display various physical complications. One such problem is thrombocytopenia. However, no studies have investigated links between AN and thrombopoietin (TPO), which is the primary regulator of megakaryocyte and platelet production produced mainly in the liver, although TPO has been recently reported to play a role in thrombocytopenia in liver diseases. We therefore clarified temporal relationships between platelet counts and TPO level in a woman with AN and severe liver dysfunction in whom platelet count decreased to 53 x 10⁹/L. While international normalized ratio (INR) was low, serum TPO level was relatively low despite low platelet counts. After INR and liver enzymes improved in conjunction with improved nutritional status, a rapid increase in TPO was observed and platelet count began to rise. These findings thus suggest that decreased TPO production accompanying liver dysfunction may be related to thrombocytopenia besides myelosuppression in AN with malnutrition.
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