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1: Arch Orthop Trauma Surg. 2004 Oct;124(8):571-3. Epub 2004 Aug 31.
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Intra-articular synovial hemangioma; a rare cause of knee pain and swelling.

Okahashi K, Sugimoto K, Iwai M, Tanaka M, Fujisawa Y, Takakura Y.

Department of Orthopedic Surgery, Saiseikai Nara Hospital, 4-643 Hachijo, Nara-shi, 6308145 Nara, Japan. okahashi@mub.biglobe.ne.jp

INTRODUCTION: Synovial hemangioma is a rare intra-articular benign tumor that is difficult to diagnose because of its nonspecific symptoms. Patients are generally children or young adults with a nontraumatic recurrent swollen painful knee. CASE PRESENTATION: A 24-year-old woman presented with a 20-year history of recurrent pain and swelling in the right knee. Physical examination revealed a small painful point adjacent to the medial side of the patella. Magnetic resonance imaging revealed an intra-articular tumor. After arthroscopic examination, surgical excision was performed. The histology was characteristic of synovial hemangioma. RESULTS: Open complete synovectomy of the circumscribed capillary hemangioma was successful, and the patient remains asymptomatic 2 years after surgery.

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PMID: 15340750 [PubMed - indexed for MEDLINE]