<prompt> Imfection of all the following structures can be cause Psoas Abscess exceptVeebraeAppendixHip jointRibs  <response>: Abscess in the psoas region in the iliac fossa, is commonly due to tuberculosis of spine T 10 and lymph nodes, retroperitoneal structures, lower intercostal region. It can also be a pyogenic abscess. Clinical Features Back pain, fever, spinal tenderness, para spinal spasm and restricted spine movement. ref:SRB;S manual of surgery,ed 3,pg no 651 