Abnormal Liver Function Tests in an Anorexia Nervosa Patient and an Atypical Manifestation of Refeeding Syndrome

Skeletal effects and refeeding syndrome in anorexia nervosa

Purpose Anorexia nervosa (AN) is a psychiatric disorder which can lead to numerous medical complications. In the clinical practice, during weight restoration, it is relatively common to observe potentially fatal complications, such as refeeding syndrome (RS). The objective of this case report is to highlight some key factors regarding nutritional support and the therapeutic approach in AN to avoid life-threatening complications, for example severe hypophosphatemia. Methods We present the case of a 14-year-old girl suffering from AN, who was admitted to our hospital with lethargy, emaciation with bitemporal wasting, hirsutism and pitting lower extremity edema. Results Based on the laboratory findings, the concerning condition of the patient was attributed to hypophosphatemia (1,64 mg/dl) caused by RS. Conclusions Refeeding syndrome is a potentially lethal condition in the case of AN patients. Hypophosphatemia, which is a result of the refeeding syndrome, is a relatively common complication of overly aggressive nutritional rehabilitation. Physicians who are involved in treating this condition, should be aware of this potentially life-threatening syndrome, and assess their therapeutic approach accordingly Keywords: anorexia nervosa, hypophosphatemia, refeeding syndrome, nutritional support,

Starvation-induced Liver Enzyme Elevation after Initiation of Feeding

Exacerbation of liver enzymes after the initiation of feeding in malnourished patients is caused by refeeding syndrome or persistent starvation. There are no definite clinical markers for distinguishing between the two conditions. We herein report a 63-year-old woman with starvation-induced liver enzyme elevation. Her body weight was inversely associated with the liver enzyme levels after refeeding, which was a different course from refeeding syndrome. Normalization of liver enzymes ensued as the caloric intake increased and weight gain progressed. Daily changes in body weight can be a useful clinical marker for distinguishing between refeeding syndrome and starvation-induced liver enzyme elevation.

Expanding the differential diagnosis for transaminitis in patients with anorexia nervosa

Aminotransferase elevations have been described in patients with anorexia nervosa. Hypothesized etiologies have included ischemic hepatitis, refeeding-induced transaminitis, and the process of autophagy. Supervised enteral nutrition is the mainstay of treatment for severe anorexia, but an increase in aminotransferase levels after initiation of enteral feeding presents clinicians with a diagnostic dilemma. We present a 31-year-old woman with anorexia nervosa (body mass index [BMI] of 13.5 kg/m²) who experienced a worsening of aminotransferase elevations even after the initiation of enteral feeding. Despite nutritional supplementation, the patient's weight continued to fall for 6 days. Peak aminotransferase concentrations correlated with the patient's lowest weight and improved only after an increase in BMI was eventually achieved. Secondary causes of severe transaminitis were investigated, and after no cause was found, a liver biopsy was performed. Pathology was consistent with liver injury secondary to severe malnutrition rather than from refeeding syndrome. This case highlights malnutrition as an important cause of aminotransferase elevations and underscores the need for judicious early weight restoration in patients with anorexia and abnormal liver chemistry.

[Quality management in weight restitution in Anorexia nervosa--pathophysiology, evidence-based practice and prevention of the refeeding syndrome]

During refeeding syndrome-a well-known and dreaded complication of weight-restauration in anorexia nervosa-a shift of electrolytes and fluid can occur in malnourished patients and might therefore lead to-potentially fatal-cardiovascular, respiratory and neurological symptoms. Causes of this are metabolic and hormonal changes during re-establishment of a carbohydrate-rich diet. This syndrome is most commonly associated with hypophosphatemia, which can however be accompanied by other chemical laboratory abnormalities. Standardized guidelines for the prevention and management of the refeeding syndrome have not yet been established. In case and cohort studies different low- and high-calorie diet protocols led to comparable results with similar complication rates. A focus should be placed on prevention of serious complications by careful monitoring. The pathophysiology, the main constituents in the development of the refeeding syndrome, recommendations for risk assessment and treatment, and current evidence are discussed.