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Baker's cyst

**{{{Name|Baker's cyst}}}**
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}} A Baker's cyst, otherwise known as a poplitealcyst, is a benign swelling found behind the kneejoint. It is named after the surgeonwho first described it, Dr. William Morrant Baker(1839-1896).

Inhaltsverzeichnis

1 Causes
2 Diagnosis
3 Treatment
4 External links
5 References

Causes

In adults, Baker's cysts usually arise from arthritic knee joints. Almost any form of knee arthritiscan cause it. Baker's cysts in children do not point to underlying joint disease.

The synovialsack of the knee joint can, under certain circumstances, produce a posterior bulge, into the popliteal space, the space behind the knee. When this bulge becomes large enough, it becomes palpable and cystic. Most Baker's cysts maintain this direct communication with the synovial cavity of the knee, but sometimes, the new cyst pinches off. A Baker's cyst can rupture and produce acute pain behind the knee and in the calf and swelling of the calf muscles.

Diagnosis

Diagnosis is by examination, and, if needed, aspiration of synovial fluid from the cyst. Baker's cysts are most easily felt with the knee partially flexed. They are easier to see from behind with the patient standing with knees fully extended.

A burst cyst can cause calf pain and swelling that mimic thrombophlebitis, in which case ultrasonographycan be used to rule out DVT. Although an infrequent occurrence, a Baker's cyst can compress vascular structures and cause leg edema and true thrombophlebitis.

Treatment

Baker's cysts usually require no treatment unless they are symptomatic. Often rest and leg elevation are all that is needed. If necessary, the cyst can be aspirated to reduce its size, then injected with a corticosteroidto reduce inflammation. Surgical excision is reserved for cysts that cause a great amount of discomfort to the patient. A ruptured cyst is treated with rest, leg elevation, and injection of a corticosteroid into the knee.

Baker's cysts in children nearly always disappear with time, and rarely require excision.

External links

Who Named Itsynd/605
GPnotebook302383106
Marshal University Orthopaedics

References

{{Book reference

| Author = Hellmann, DB 
| Year = 2005
| Title =  Current Medical Diagnosis & Treatment
| Chapter = Chapter 20: Arthritis & Musculoskeletal Disorders
| Editor = Tierney LM, Jr., McPhee SJ, Papadakis MA
| Edition = 44th Edition
| Publisher = F. A. Davis Company
| Location = Philadelphia, PA
| ID = 
| URL =

}} ISBN 0071453237

Retrieved from "http://en.wikipedia.org/Baker%27s_cyst"

Categories: Eponymous diseases| Surgery

This article is licensed under the GNU Free Documentation License.
It uses material from the http://en.wikipedia.org/wiki/Baker%27s+cyst Wikipedia article Baker's cyst.

All text is available under the terms of the GNU Free Documentation License