PTK2B and colorectal carcinoma: Regarding the liver-derived cfDNA, a statistically significant difference was found between patients with either liver aGvHD, CRC with liver metastasis (mean PTK2B concentration 2.25 log PTK2B copies/ml plasma; 95% CI: 1.87–2.66), or drug-induced liver damage (mean PTK2B concentration 2.03 log PTK2B copies/ml plasma; 95% CI: 1.04–2.7) when compared to healthy donors (p < 0.001).