<prompt> Avascular necrosis may be seen in all of the following, exceptScapulaHead of femurUpper end of humerusBody of Talus  <response>: Common Site of Avascular necrosisCauseHead and femurFracture neck femur SubcapitalPosterior dislocation of hipProximal pole of scaphoidFracture through waist of scaphoidBody of talusFracture neck of talusProximal pole of lunateLunate dislocationOther sites of common AVN are Distal medial condyle, Humeral head, Capitellum, and Metatarsal headsIn the early stages, bone scintigraphy and MRI are the diagnostic modalities of choice.Non ohopedic causes of AVN - Sclera, Caissons disease, Lupus erythematosus, Radiation and Alcohol Refer: Apleys system of Ohopedics and Fracture, 8th edition, pg no: 91-103, 436-439 