Nephrogenic pleural effusion.
Although the presence of a pleural effusion is almost always indicative of an intrathoracic problem reflection will yield a certain number of extrathoracic causes, such as hypoproteinemia, Meigs' syndrome pancreatitis and subphrenic abscess. The kidney is a close neighbor of the diaphragm and pleural cavity, and a case of renal stone associated with a small ipsilateral pleural effusion, which regressed with resolution of the primary process, is reported.
D000328:Adult; D006801:Humans; D007669:Kidney Calculi / Q000150:complications* / Q000000981:diagnostic imaging; D008297:Male; D010996:Pleural Effusion / Q000000981:diagnostic imaging / Q000209:etiology*; D011859:Radiography