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CC BY-NC-ND-license · Joints 2016; 04(04): 253-255
DOI: 10.11138/jts/2016.4.4.253
Original Article
Georg Thieme Verlag KG Stuttgart · New York

A case of intra-articular angioleiomyoma of the talocrural joint

Irene Thung
1   Division of Anatomic Pathology, Department of Pathology, University of California, San Diego Medical Center, San Diego, CA, USA
,
Sepi Mahooti
2   Division of Anatomic Pathology, Department of Pathology, VA San Diego Healthcare System, San Diego, CA, USA
,
Xiangdong Xu
2   Division of Anatomic Pathology, Department of Pathology, VA San Diego Healthcare System, San Diego, CA, USA
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Publikationsdatum:
15. September 2017 (online)

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Abstract

Angioleiomyoma is a benign pericytic neoplasm with smooth muscle differentiation. Intra-articular angioleiomyoma is exceptionally rare with only four cases reported, all involving the knee joint. Here we report the first case of intra-articular angioleiomyoma entirely localized within the ankle joint. An 83-year-old male presented with progressively worsening ankle pain. Subsequent magnetic resonance imaging showed a soft tissue mass within the talocrural joint. Histologic examination and ancillary testing demonstrated fascicles of smooth muscle cells and interspersed, often compressed, vascular channels, consistent with an angioleiomyoma. This case highlights the importance of including angioleiomyoma in the differential diagnosis of an ankle joint mass.

Key Words

intra-articular - ankle - angioleiomyoma - pericytic neoplasm - soft tissue mass