histopathology microscopic appearance invasive ductal carcinoma breast slide stained haematoxylin eosin histopathology microscopic appearance invasive ductal carcinoma breast slide stained antibody immunohistochemistry oncogene neu dark brown reaction indicates tumor expresses gene cytopathology microscopic appearance pap test pink cell center large nucleus abnormal compatible low grade dysplasia autopsy brain surrounded pus yellow greyish coat around brain dura lifted forceps result bacterial meningitis gross examination
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