245 DNA and RNA alterations associated with colorectal peritoneal metastases: A systematic review Table 2. Continued Reference Patients’ Specification No. of Patients for Analysis Tissue Samples Tissue Collection Without PM With PM Yang et al. 50 Cohort of patients with mCRC. 412 170 Unknown Not performed, RET status was already known Yokota et al. 40 Cohort of patients with CRC. 175 54 Frozen or FFPE tissues Retrospect, archives of pathology department Zihui Yong et al. 51 Stage 4 CRC patients with metastases to the liver, lung, and/or peritoneum. 266 89 FFPE surgical specimens Not performed, KRAS status was already known CRC, colorectal cancer; FFPE, formalin-fixed paraffin embedded; LM, liver metastases; mCRC, metastatic colorectal cancer; PM, peritoneal metastases; * Use of a control group with non-PM from a previous published study. 11
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