on the basis of the studies reported on steroid receptors in brain tumours , cytoplasmic and nuclear estrogen ( er ) and progesterone ( pr ) receptors have been examined in forty primary spinal cord tumours : fifteen neurinomas , three neurofibromas , nine meningiomas , nine ependymomas , two astrocytomas , one oligodendroglioma and one hemangiopericytoma with the exchange method in the presence of sodium thiocyanate for er and using the synthetic progestin r5020 for pr .
C0034840
steroid receptors
C0034833
progesterone