<prompt> Colonic pseudo-obstruction occurs in all, except:Diabetes mellitusDermatomyositisSclerodermaHyperthyroidism  <response>: Ans. d HyperthyroidismCauses of secondary pseudo-obstruction of colon: Secondary pseudo-obstruction of colon is most common Neurological medications Opiates Myxedema Hypothyroidism Hyper parathyroidism Uremia SLE Scleroderma Diabetes mellitus Retroperitoneal hematoma Parkinsons disease Metabolic diseases. 