a series of 16 cerebellar medulloblastomas were studied immunohistochemically using a four-step immunoperoxidase ( pap ) method and a monoclonal antibody ( maba9-c6 ) which defines an epitope of the retinal s-antigen , a protein known to occur in retinal photoreceptor cells and pinealocytes of the pineal gland as well as in retinoblastomas , pineocytomas and pineoblastomas .
C1519090
pinealocytes
C0917890
pineocytomas