title: Antacid-induced hypophosphatemia: an unusual cause of "pseudo-myopathy".
abstract: A 69 year old man presented with painful proximal muscle weakness which clinically simulated polymyositis. Further evaluation revealed normal muscle enzymes and hypophosphatemia which resulted from unsuspected antacid abuse. "Pseudo-myopathy" is one example of the myriad of rheumatic diseases which may be mimicked by hypophosphatemia.
mesh_terms: D000368:Aged; D000536:Aluminum Hydroxide / Q000009:adverse effects* / Q000627:therapeutic use; D003937:Diagnosis, Differential; D006801:Humans; D008274:Magnesium / Q000009:adverse effects*; D008276:Magnesium Hydroxide / Q000009:adverse effects* / Q000627:therapeutic use; D008297:Male; D009135:Muscular Diseases / Q000139:chemically induced*; D009220:Myositis / Q000175:diagnosis; D010710:Phosphates / Q000097:blood*; D011191:Potassium Deficiency / Q000139:chemically induced*
chemical_list: D010710:Phosphates; D000536:Aluminum Hydroxide; D008274:Magnesium; D008276:Magnesium Hydroxide