The hospital records of 168 PSP patients treated in the thoracic surgery department of Recep Tayyip Erdogan University Education and Research Hospital over the 5-year period between January 2016 and December 2020 were reviewed retrospectively. All patients with PSP, who aged between 17 and 35 years, presented to our clinic, and had complete records, were included in the study. Patients, who aged <17 years or >35 years, whose records were incomplete, or who presented to our hospital from outside the region, were excluded.Demographic data collected from the patients' records included age, gender, PSP side, a first episode or recurrence, length of hospital stay, smoking status, treatment received,