Indian Journal of Radiology and Imaging Indian Journal of Radiology and Imaging

: 2006  |  Volume : 16  |  Issue : 4  |  Page : 957--958

Radiological quiz - musculoskeletal

P Sharma, U Hemal 
 Deptt. of Radiology, L.H.M.C., N. Delhi - 1, India

Correspondence Address:
P Sharma
Senior Resident, Deptt. of Radiology, L.H.M.C., N. Delhi - 1

How to cite this article:
Sharma P, Hemal U. Radiological quiz - musculoskeletal.Indian J Radiol Imaging 2006;16:957-958

How to cite this URL:
Sharma P, Hemal U. Radiological quiz - musculoskeletal. Indian J Radiol Imaging [serial online] 2006 [cited 2021 Jan 23 ];16:957-958
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Full Text

A 7 year old male presented with right side knee pain. USG of knee was done using high frequency small part linear probe. What is your diagnosis?

 Radiological Diagnosis


USG revealed a 0.97 x 0.28 cm cystic lesion involving right side medial meniscus suggestive of right side meniscal cyst.

Meniscal cysts may be defined as encapsulated mass lesions containing synovial - like fluid continuous with a meniscus [1]. The incidence varies in reports from 1% to 20%. [2]. They present with pain and swelling at the joint line. They usually arise as a result of fluid passage from the joint to the periphery of the meniscus through a horizontal cleavage tear or complex tear of the meniscus. The cysts tend to have a broad base, and communication with the meniscus can usually be demonstrated, which aids in differentiating the meniscal cyst from the distended bursa [1].

Lateral meniscal cysts are two to four times more common than medial meniscal cysts. Medial cysts, though less common, frequently tend to be asymptomatic even though they may be larger than cysts in the lateral meniscus [3]. The exact etiology of meniscal cysts is unknown. A myxoid degenerative process is identified histologically. There is often a history of precedent trauma [2].

Meniscal cysts appear at sonography as hypoechoic fluid - filled mass that may or may not be compressible. They may be multiloculated. Because there is stasis, the fluid in a meniscal cyst may become progressively complex with the passage of time, demonstrating increasing echoes and may even appear solid on sonography [4]. Demonstration of the underlying tear is possible in some but not all cases.

Conservative treatment in the patient with few symptoms is recommended. Should the cyst become significantly symptomatic, it is necessary to treat the meniscal pathology to prevent a cyst recurrence [2][8].


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