Secondary spontaneous pneumothorax is generally managed by surgery, if pneumothorax was not improved following chest tube insertion or in the event of persistent air leakage lasting more than 5 days. However, if surgery is not an option, chemical pleurodesis with sclerosants can be performed. Several sclerosants have been used in the chemical pleurodesis of secondary spontaneous pneumothorax, However, there is still controversy for what is the ideal sclerosant for Secondary spontaneous pneumothorax. The use of L. for chemical pleurodesis in patients with secondary spontaneous pneumothorax aged >65 years has not been described to date, despite its extensive use. The authors tried to find out the effect of L. for sclerosant for Secondary spontaneous pneumothorax in elder.