Avascular necrosis may be seen in all of the following, except

Common Site of Avascular necrosisCauseHead and femurFracture neck femur (Subcapital)Posterior dislocation of hipProximal pole of scaphoidFracture through waist of scaphoidBody of talusFracture neck of talusProximal pole of lunateLunate dislocation*Other sites of common AVN are Distal medial condyle, Humeral head, Capitellum, and Metatarsal heads*In the early stages, bone scintigraphy and MRI are the diagnostic modalities of choice.*Non ohopedic causes of AVN - Sclera, Caisson's disease, Lupus erythematosus, Radiation and Alcohol (Refer: Apley's system of Ohopedics and Fracture, 8th edition, pg no: 91-103, 436-439)