What symptom is associated with Maple syrup urine disease (MSUD)?

What symptom is associated with Maple syrup urine disease (MSUD)?

• A. Sweet-smelling urine
• B. Burnt sugar odor to urine
• C. Acidic urine
• D. Musky odor to breath

Answer: (B)

Maple syrup urine disease (MSUD) is characterized by a distinct metabolic disorder that leads to an accumulation of certain amino acids in the body. One of the key symptoms associated with this condition is the presence of a burnt sugar odor in the urine. This unusual smell is a result of the excretion of branched-chain amino acids, such as leucine, isoleucine, and valine, which are not metabolized properly in individuals with MSUD.

The sweet or burnt sugar-like smell is a classic hallmark of the disease and can be one of the first indicators that leads to diagnosis, particularly in newborns. Recognizing this unique odor is crucial for early identification and management of the disease, which can help in preventing serious complications.

Other options, while they may describe different conditions, do not correctly represent the specific symptom associated with MSUD. For example, sweet-smelling urine could be associated with other metabolic disorders, while acidic urine can result from a variety of other underlying conditions, and a musky odor of breath is not characteristic of MSUD specifically. Therefore, the burnt sugar odor in urine establishes a strong connection to MSUD, making it the correct answer.