ALB and neoplasm: The aim of the present study was to evaluate prognostic value of tumour‐related factors of retroperitoneal HSA, focusing on the biological behaviour of the tumour, especially tumour size, rupture, invasion into adjacent tissue, involvement of lymph node and distant metastasis, and to compare those with spleen and liver HSA (Burton et al., 2012; Hillers et al., 2007; Mullin & Clifford, 2019).