SYP and neoplasm: Two board-certified pathologists (A.P., M.T.)confirmed PD tumoroids were alike the original tumor tissue in high tumor content, in tumor cell morphology, and in the expression of diagnostic neuroendocrine biomarker synaptophysin, based on the cytology of micro-cell-blocks from cultured cells (Fig. 2a, Supplementary Fig. S2a, Supplementary Table S3).