Calcific tendinitis of the flexor digitorum profundus in a pediatric patient: A common condition in an uncommon location

In this report, we present the case of a 12-year-old boy with calcific tendinitis of the flexor digitorum profundus (FDP) tendon, presenting with pain and restricted movement in the left index finger. The patient had no history of trauma or illness, and laboratory tests showed mildly elevated inflammatory markers. Multimodality imaging, including X-ray, sonography, and magnetic resonance imaging, confirmed calcific deposits within the FDP tendon, with no signs of infection or bone involvement. Conservative treatment with non-steroidal anti-inflammatory drugs and splinting resulted in significant improvement, with complete symptom resolution and near-total disappearance of the calcification on follow-up radiographs. This case highlights the importance of imaging in diagnosing calcific tendinitis in pediatric patients, a rare condition in this age group. Imaging plays a pivotal role in confirming the diagnosis and ruling out differential diagnoses, such as infection or trauma. Early recognition and non-invasive management ensure excellent outcomes, avoiding unnecessary interventions.