In children aged 2-24 months, what is the first imaging test recommended after multiple urinary tract infections?

In children aged 2-24 months who experience multiple urinary tract infections (UTIs), the first imaging test recommended is ultrasound. This guideline is based on the need to evaluate for potential anatomic abnormalities of the urinary tract that may contribute to recurrent infections, such as hydronephrosis or structural anomalies.

Ultrasound is a non-invasive imaging technique that uses sound waves to create images of internal structures. It does not involve radiation, making it a safer option for young children. The primary aim of performing an ultrasound in this context is to identify any abnormalities in the kidneys and urinary bladder that could predispose a child to infection.

Other imaging modalities, such as a Voiding Cystourethrogram (VCUG) or CT scan, have more specific roles and are typically reserved for cases where the ultrasound results indicate potential issues or when further evaluation of the urinary tract is warranted. A VCUG involves the insertion of a catheter and exposes the child to radiation, making it less suitable as an initial screening test. A CT scan, while very detailed, is also associated with radiation exposure and is not typically the first choice, especially in young children.

Therefore, ultrasound is correctly identified as the first imaging test in this scenario due to its safety, accessibility,