1) 43 cases of sciatic nerve injury due to gluteal injection were evaluated for age incidence, neural involvement and proonosis.

2) Age incidence was varied from under 1 to 61 and most frequent in under 4 (62.7%).

3) Peroneal nerve were commonly involved (83.7%). Tibial nerve involvement was 9.3% and both nerves were involved in 7.0% of all cases. The reason of the susceptability of peroneal nerve could be explained by that peroneal nerve is located laterally and superficially.

4) 42% of the cases were recovered and 80% of old cases were also recovered.

5) Those who did not recover in 2 years did not show any muscle potential in E.M.G. which means there is no muscle. Another word, the muscles were degenerated.

6) The cause of sciatic nerve injury due to gluteal injection can be improper positioning, thin and emaciated person limited area for the injection due to burn or casting, lack of education, unawareness and hast, etc. Especially, injection in a struggling child or infant is dangerous.

7) Pathology of injection neuropathy can be inflammation necrosis, granulation formation, neuroma, etc.

8) Surgical approach can be benifit. Necrolysis, excision and graft, removal of foreign body ets can be positive approach.

9) Recommanded modification of the dlassic upper outer quadrant is an outer area from the line between posterior iliac spine and greater trochanter of the femur.