ERBB2 and neoplasm: The detailed IHC profile is as follows: P53 (-), Ki-67 (95% +), CD31 (tumor), D2-40 (lymphatic +), MSH 2 (+), MLH 1 (+), MSH 6 (+), PMS 2 (+), HER-2 (0), CK (+), P63 (+), CK5/6 (+), SMARCA4/Brg 1 (+), AFP (-), CgA (-), Syn (-), CD56 (-), SALL-4 (-).The IHC revealed that the patient’s tumor exhibited proficient mismatch repair (pMMR) status.