TACSTD2 and neoplasm: The co‐expression of any 1 gene from Group A (C19orf33, S100A14, and RHOD; count ≥1) and any 1 gene from Group B (CST6, CD44, TM4SF1, and TACSTD2; count ≥1) in a single tumor cell was defined as a MIC (Figure S2A, Supporting Information box).