Intraligamentous Synovial Osteochondroma of the Ligamentum Teres: a Series of 14 Cases

Overview

Journal Int J Clin Exp Pathol

Specialty Pathology

Date 2022 Aug 11

PMID 35949810

Authors

Rana M Ajabnoor

David A Quinzi

Emily Carmody

Brendan F Boyce

Affiliations

Soon will be listed here.

Abstract

Background: The ligamentum teres (LT) is covered by synovium. It acts as a stabilizer of the hip and as such it has been compared to the ACL of the knee joint. Pathologic changes occur in the LT with aging and osteoarthritis (OA), including degeneration, occasional chondroid metaplasia, and synovial chondromatosis are well-recognized in the literature. However, there are no reports of intraligamentous synovial osteochondroma occuring in the LT.

Methods: We reviewed the pathology reports of 542 osteoarthritic femoral arthroplasty specimens between January 2016 and December 2018. The LT was examined histologically in 55 cases because it was abnormal on gross examination.

Results: A single synovial osteochondroma, ranging in size from 0.4-1.7 cm in diameter, was present in the body of the LT in 14 cases (9 males; 5 females, aged 34 to 81 years), representing 2.6% of 542 arthroplasty cases. Ten of the osteochondromas had bone marrow fat without hematopoietic elements, 1 had hematopoietic elements, and 3 had no marrow among the bony trabeculae. Radiographically, all cases had moderate to severe osteoarthritis with no mention of an abnormality of LT.

Conclusion: To our knowledge, this is the first report of intraligamentous synovial osteochondroma in the LT in osteoarthritis patients undergoing hip arthroplasty. It provides further support for microscopic examination of arthroplasty specimens for histologic abnormalities. Further prospective study is needed to determine if this lesion contributes adversely to the development or progression of osteoarthritis and if it is a reactive or neoplastic process.

Citing Articles

Solitary Extraskeletal Giant Osteochondroma of the Ankle in a Four-Year-Old Boy.

Laliotis N, Konstantinidis P, Chrysanthou C, Zarampoukas T Cureus. 2023; 15(5):e39442.

PMID: 37362493 PMC: 10289278. DOI: 10.7759/cureus.39442.

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