The obturator internus (OI) is a hip muscle that originates deep within the pelvis and attaches to the head of the femur (the top of the thigh bone that inserts into your hip). Ganglion cysts are non-cancerous, fluid-filled lumps that can develop around joints and tendons in any part of the body, particularly the hand and wrist. Symptoms, if any, depend on the size and location of the cyst, and can include pain, numbness, tingling, weakness or trouble with joint movement.
Osteochondromas are benign (non-cancerous) tumors that develop on the surface of a bone near the growth plate during childhood or adolescence. Most often, osteochondromas affect the long bones in the pelvis, the leg, or the shoulder blade. There is a small lifetime risk of malignant (cancerous) transformation to chondrosarcoma, which occurs during adulthood and most commonly in individuals with hereditary multiple osteochondromas (about 5 percent of cases). Symptoms vary depending on the anatomic site, extent, and distribution of involvement, but can include pain and numbness. Most osteochondromas are asymptomatic (do not cause symptoms) unless a fracture is present or impending.
Paralabral and perilabral cysts are non-cancerous fluid-filled lesions that occur in the space between the labrum (a rim of soft tissue that cushions the hip socket) and the capsule of the hip joint. These types of cysts are often associated with a labral tear. Hip labral tears may occur as a result of trauma (e.g. car accidents), repetitive motions (e.g. sports injuries), structural abnormalities (e.g. hip dysplasia) and as part of the aging process (degenerative wear-and-tear). Individuals with this type of cyst may not have symptoms or may experience symptoms of groin/hip pain, a snapping sensation of the hip with movement, and/or sciatica (nerve pain in the leg that is caused by irritation or compression of the sciatic nerve). The treatment depends on the degree of symptoms and can include draining fluid from the cyst or surgical removal.
The hip is a ball and socket joint in which the head (ball) of the femur (the thigh bone) meets the pelvis (socket). In a CAM deformity of the hip, the head is not perfectly spherical (round shape) and does not fit well into the socket. Evidence suggests that CAM deformities are a developmental issue that occurs more commonly in adolescents involved in sports. If the femoral head is not shaped normally, the abnormal part of the femoral head can jam into the socket when the hip is bent (CAM impingement). Hip impingement is a major cause of osteoarthritis of the hip. Symptoms of CAM deformity and CAM impingement include pain in the groin after prolonged sitting or walking. Many athletes often describe pain in the groin with deep flexion or rotation of the hip during activity. Occasionally, a popping or clicking in the front of the hip is described. Pain may also radiate along the side of the thigh and in the buttocks.
Hip impingement, also known as femoroacetabular impingement (FAI), is a condition in which there is abnormal and wearing contact between the ball and socket of the hip joint. The result is increased friction during hip movements that may damage the joint.Symptoms include pain in the groin after prolonged sitting or walking. Many athletes often describe pain in the groin with deep flexion or rotation of the hip during activity. Occasionally, a popping or clicking in the front of the hip is described. Pain may also radiate along the side of the thigh and in the buttocks. It is important to rule out other causes of pain in this area which may originate in the low back or abdomen.
As an individual ages, it is common for the cartilage (thin tissue that covers bone surfaces providing smooth, friction-free movement) in the hip joint to wear down. Degenerative hip joint changes can cause symptoms such as pain, stiffness, swelling around the joint, tenderness, limited range of motion, or a sensation of catching or grinding in the joint with movement.
