Published online by Cambridge University Press: 01 March 2011
This chapter includes infectious and inflammatory and diseases of the synovia, tenosynovia, and tendons, with an emphasis on morphology. Also included in the discussion are synovial foreign body reactions related to joint prostheses. The only neoplasm discussed here is the tenosynovial giant cell tumor. Synovial sarcoma is a neoplasm unrelated to synovial tissue, and it is discussed with soft tissue tumors with epithelial differentiation (see Chapter 27). Clear cell sarcoma of tendons and aponeuroses is included among the neuroectodermal neoplasms (see Chapter 25).
SYNOVIAL BIOPSY
Synovial tissue is normally lined by a mildly folded membrane lined by a one- to two-cell layer of specialized fibroblasts and histiocytes; there is no epithelial lining. The stroma contains fat cells and loose connective tissue. There are few if any lymphoid cells or neutrophils in the stroma, but scattered mast cells are sometimes present.
In the past, synovial specimens have mostly included synovectomy samples from patients with rheumatoid arthritis or other surgically treated disease. More recently, diagnostic synovial biopsies have been obtained arthroscopically or blindly, yielding diagnostic information on conditions such as rheumatoid arthritis, granulomatous inflammation, or foreign body arthritis. In one study of 59 patients, a blind synovial biopsy of 59 patients with arthritis of unknown cause revealed a specific cause in only 3 cases (5%). These diagnoses were tuberculotic synovitis, synovial chondromatosis, and villonodular synovitis.
ANALYSIS OF SYNOVIAL FLUID
In addition to biopsy (or sometimes instead of it), analysis of synovial fluid gives insight into the nature of joint effusion.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.