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Twist1 positivity was an independent marker of a poor prognosis for OS in patients with PSC. (A) Twist1, Slug and Snail showed increased expression in PSCs than they did in PSCCs. (B) Patients with PSC had a worse OS than patients with PSCC. (C) Twist1-positive patients with PSC exhibited a poorer prognosis for OS than those with Twist1-negative expression. OS, overall survival; PSC, pulmonary sarcomatoid carcinoma; PSCC, pulmonary squamous carcinoma.
