Abstract
Acute calcific tendinitis poses diagnostic challenges, particularly when manifesting atraumatically in rare anatomical sites such as the hand. This article presents the effective management of a case of a 56-year-old male with acute calcific tendinitis affecting the volar aspect of the second finger's proximal interphalangeal joint. Despite initial conservative approaches, including cold application and NSAIDs, proving ineffective, the patient's symptoms persisted, prompting referral for further evaluation. Ultrasonographic assessment revealed soft tissue calcification on the flexor tendon, leading to the application of an injection treatment under ultrasound guidance resulted with significant improvements in pain management, and restored finger range of motion. This case highlights the rarity of acute calcific tendinitis in the hand, emphasizing the importance of considering uncommon manifestations in the diagnostic process. Additionally, it underscores the efficacy of ultrasound-guided interventions as a valuable therapeutic option, particularly in cases where conservative measures prove inadequate.

Key words: Acute calcific tendinitis, Finger, Hand, Tendon, Ultrasound, Ultrasound-guided intervention, Minimally invasive treatment