opinion: ischemic necrosis of the femoral head with the articular surface intact. Edema of the femoral neck and posterosuperior acetabulum and there is a joint effusion. Large inguinal synovial cyst or ganglion arising from the hip joint. at the base of the femoral neck is a corticated 2.1 by 2.4 by 1.7 cm lesion which shows isointense T1 signal and hyperintense T2 signal. The exact etiology is unknown however there is edema in the the adjacent marrow. suspected that this fatty island intensity is seen on the left.no fracture of the femoral neck and pelvic ischium and pubic bones are intact. arising from the anterior joint space is a ganglion cyst 3 cm in diameter. it aleavates the femoral artery and vein from inguinal area. do I have surgery the pain is cronic?