using a four-step immunoperoxidase ( pap ) method and the monoclonal antibody maba9-c6 ( maba9-c6 ) , which defines an epitope of the retinal s-antigen ( s-ag ) , we investigated the s-ag immunoreactivity in human fetal , newborn , infantile and adult pineal glands and in 13 human pineal parenchymal tumors .
C0031939
pineal glands
C0031941
pineal parenchymal tumors