Which complication is least likely to be associated with eating disorders like anorexia nervosa?

Eating disorders such as anorexia nervosa can lead to a variety of medical complications due to malnutrition, electrolyte imbalances, and the physiological effects of starvation. Hypokalemia, or low potassium levels, is commonly seen in anorexia nervosa, especially if there are associated purging behaviors, which can lead to significant electrolyte disturbances. Heart failure can occur as a result of electrolyte imbalances, particularly from potassium or magnesium levels, which are crucial for cardiac function.

Dental erosions can be a result of repeated vomiting and acid exposure if purging behaviors are present, making it a recognized complication in those with bulimia or anorexia with purging tendencies.

In contrast, arthritis is not typically associated with anorexia nervosa. While malnutrition can affect overall health and may lead to joint problems, the direct link between anorexia nervosa and arthritis is not firmly established. Therefore, arthritis is the least likely complication to be related to eating disorders like anorexia nervosa, as the other conditions have more direct pathophysiological relationships with the disorder.