In a recent retrospective study of targeted NGS in a cohort of 169 EBV T/NK-LPD, including 34 STCLC, mutations were detected in 88.2% of STCLC cases, with KMT2D being the most frequently mutated gene (17.6%), followed by MFHAS1 (14.7%), STAT3 (14.7%), EP300 (11.8%), ITPKB (8.8%), DDX3X (8.8%), NOTCH1 (8.8%), and NOTCH2 (8.8%) [47]. The gene discussed is DDX3X; the disease is disseminated peritoneal leiomyomatosis.