Osteoid osteoma of the femoral neck mistaken as a synovial herniation pit

Autor: Kelly Tomasevich, BA, Adam Lindsay, MD
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Radiology Case Reports, Vol 16, Iss 12, Pp 3844-3849 (2021)
Druh dokumentu: article
ISSN: 1930-0433
DOI: 10.1016/j.radcr.2021.08.058
Popis: A 36-year-old man presented with 1 year of atraumatic left lateral thigh, groin, and hip pain, and imaging consistent with the diagnosis of femoroacetabular impingement and a labral tear. Imaging concurrently demonstrated a synovial herniation pit. The patient underwent hip arthroscopy, which included femoroplasty, acetabuloplasty, labral debridement, and synovectomy. His pain persisted and further workup confirmed an osteoid osteoma that was mimicking a synovial herniation pit. The osteoid osteoma was treated with radiofrequency ablation. At 18 months follow-up, the patient reported complete resolution of his symptoms. We present the case to highlight distinguishing imaging and clinical findings of these similar-appearing lesions. While neither condition is particularly rare individually, the misidentification of osteoid osteoma as a synovial herniation pit is a unique feature of this case that lead to the patient's protracted clinical course.
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