title: Spontaneous gas formation in the urinary bladder.
mesh_terms: D005740:Gases; D006801:Humans; D008875:Middle Aged; D011859:Radiography; D001743:Urinary Bladder / Q000000981:diagnostic imaging* / Q000503:physiopathology; D014552:Urinary Tract Infections / Q000150:complications
chemical_list: D005740:Gases