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21/30) cases prepondered in frequency than PSP cases (30%, i.e.
Prevention by chemical pleurodesis using (10%) povidone-iodine was established for the last few decades because of its easy availability, cost, efficacy, and safety profile and reflected in many studies.[3],[7] Exact mechanism of action by a sclerosing agent (povidone-iodine) leading to pleurodesis was unknown and probably a result of a complex inflammatory reactions of pleural mesothelial cells producing excess extracellular matrix proteins synthesis and collagenigation.[8] Our study showed that spontaneous pneumothorax prepondered among males (86.66%) (26/30 cases) and among smokers (26/30) like many other studies.1 Patients of rural area suffered pneumothorax more that that of urban area (63.3% vs 36.7%).