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A Baker's cyst, also known as a popliteal cyst, is a type of fluid collection behind the knee. [4] Often there are no symptoms. [2] If symptoms do occur these may include swelling and pain behind the knee, or knee stiffness. [1] If the cyst breaks open, pain may significantly increase with swelling of the calf. [1]
Various etiologies have been proposed, including trauma, hemorrhage, chronic infection, and mucoid degeneration. The most widely accepted theory describes meniscal cysts resulting from extrusion of synovial fluid through a peripherally extended horizontal meniscal tear, accumulating outside the joint capsule.
Common locations include upper back, shoulders, and abdomen. [4] It is possible to have several lipomas. [3] The cause is generally unclear. [1] Risk factors include family history, obesity, and lack of exercise. [1] [3] Diagnosis is typically based on a physical exam. [1] Occasionally medical imaging or tissue biopsy is used to confirm the ...
Lipomas are usually diagnosed clinically, although imaging (ultrasound, computed tomography, or magnetic resonance imaging) may be utilized to assist with the diagnosis of lipomas in atypical locations. [24] The main treatment for lipomas is surgical excision, after which the tumor is examined with histopathology to confirm the diagnosis. [24]
Ultrasound is done if aneurysms or pseudoaneurysms and venous or arterial thrombosis is suspected. Ultrasound is an accurate method for examining the cartilaginous cap of the osteochondroma. It is also a way of pinpointing bursitis. However, it cannot be used to predict if the growth of tumor is inward in regards to the cap. [4]
Ultrasonography is based on the principle that sound can pass through human body tissues and is reflected by the tissue interfaces [nb 1] in the same way that light can reflect back on itself from a mirror. Tissue in the body will offer varying degrees of resistance, known as acoustic impedance, to the path of the ultrasound beam. When there is ...
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[3]: 102 Extra-articular tumors are usually found in the knee, thigh, and foot. [ 3 ] : 101 Symptoms include swelling, pain, sensitivity, and/or limited range of motion. [ 3 ] : 102 The rate of reoccurrence is estimated to be 18-46% for intra-articular tumors and 33-50% for extra-articular tumors.