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Tubercular Popliteal Cyst as a Primary Presentation in an AdultA Case Report and Review of the Literature
Chandrasekaran Marimuthu, MBBS, MS(Ortho)1; Nandakumar Rangarajan, MBBS, DOrtho, MS(Ortho)1; Vineet Thomas Abraham, MBBS, MS(Ortho)1; Ravichandran Subbiah, MBBS, MS(Ortho)1
1 Department of Orthopaedics, Mahatma Gandhi Medical College and Research Institute, Pillayarkuppam, Pondicherry, India. E-mail address for C. Marimuthu: chandruortho@yahoo.com.
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Investigation performed at the Department of Orthopaedics, Mahatma Gandhi Medical College and Research Institute, Pondicherry, India

Disclosure: None of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of any aspect of this work. None of the authors, or their institution(s), have had any financial relationship, in the thirty-six months prior to submission of this work, with any entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. Also, no author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

Copyright © 2013 by The Journal of Bone and Joint Surgery, Inc.
JBJS Case Connector, 2013 Dec 11;3(4):e128 1-5. doi: 10.2106/JBJS.CC.M.00163
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A popliteal cyst is the most common cystic lesion around the knee and is also known as a popliteal synovial cyst or a Baker cyst1,2. A popliteal synovial cyst results from the collection of synovial joint fluid through a synovial defect in the posterior capsule of the knee joint. It was first described by Adams in 1840, and subsequently popularized by Dr. William Morrant Baker in 18771,2. These cystic swellings in the popliteal region have been evaluated with anatomical cadaveric studies and magnetic resonance imaging (MRI)3, which has helped us to understand the underlying pathology. Although noninfectious conditions like degenerative joint disease, internal derangements of the knee, and inflammatory conditions of the knee are commonly associated with a Baker cyst, infective arthritis can also present as a popliteal cyst3-6. However, an infected popliteal cyst without knee joint involvement is a rare presentation. This case report describes a patient with a tubercular popliteal cyst. The patient was informed that data concerning the case would be submitted for publication, and he provided consent.
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    popliteal cyst ; cyst

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