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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]
Another is between the popliteal artery and the posterior surface of the knee-joint. It receives afferents from the knee-joint, together with those that accompany the genicular arteries. The others lie at the sides of the popliteal vessels, and receive, as efferents, the trunks that accompany the anterior and posterior tibial vessels. [2]
The white tumor infiltrates the adjacent skeletal muscle (red tissue – lower left) and fat (yellow tissue – upper left). This tendency for invasion of adjacent normal tissues and structures is the reason that desmoid-type fibromatosis has a relatively high rate of local recurrence, even after surgical removal.
A lipoma is a benign tumor made of fat tissue. [1] They are generally soft to the touch, movable, and painless. [1] They usually occur just under the skin, but occasionally may be deeper. [1] Most are less than 5 cm (2.0 in) in size. [2] Common locations include upper back, shoulders, and abdomen. [4] It is possible to have several lipomas. [3]
MLS tumors are located in deep-seated soft tissues of the thighs (65–80% of cases), lower legs (10–15% of cases), retroperitoneum (8% of cases), and arms (5% of cases). In about one-third of cases, these tumors metastasize to other soft tissue sites (e.g. retroperitoneum, thorax, or other extremity), skeletal bone, and/or lung.
The articular capsule of the knee joint is the wide and lax joint capsule of the knee. It is thin in front and at the side, and contains the patella, ligaments, menisci, and bursae of the knee. [1] The capsule consists of an inner synovial membrane, and an outer fibrous membrane separated by fatty deposits anteriorly and posteriorly. [2]
Osteochondroma is the most common benign tumor of bone. [1] [2] The tumors take the form of cartilage-capped bony projections or outgrowth on the surface of bones . [3] [4] It is characterized as a type of overgrowth that can occur in any bone where cartilage forms bone. Tumors most commonly affect long bones around the knee and in the forearm.
Familial multiple lipomatosis is a hereditary adipose tissue disorder that is characterized by the formation of multiple lipomas that occur in a particular distribution. [1] The lipomas are well-encapsulated, slow-growing, benign fatty tumors. The distribution is defined as being focused in the trunk of the body and extremities. [2]