Which condition is characterized by "failure to thrive" in infants?

"Failure to thrive" in infants is most commonly associated with malnutrition or chronic diseases. This condition is characterized by a significant decline in growth and development, often leading to inadequate weight gain and growth failure relative to age-appropriate expectations. When infants are not receiving enough nutrients, whether due to a lack of feeding, absorption issues, or underlying chronic health conditions, their growth is compromised, resulting in what is termed failure to thrive.

Malnutrition can be due to various factors including insufficient caloric intake, poor feeding practices, or medical conditions that hinder nutrient absorption. Chronic diseases can further complicate nutrition by increasing metabolic demands or altering feeding behaviors, making it difficult for infants to maintain adequate growth.

While infections, genetic disorders, and endocrine disorders can contribute to failure to thrive, they are less frequently the primary cause compared to malnutrition or underlying chronic health issues. These conditions can indeed affect growth but are often secondary to the overarching problem of inadequate nutrition. Thus, the direct link between malnutrition or chronic conditions and failure to thrive establishes it as the most appropriate choice.