Both components stained for PGP9.5, synaptophysin, and chromogranin but with variable intensities: the neuroblastic component was strongly and diffusely positive for PGP9.5 and only exhibited weak labeling for chromogranin, while the reverse was true for the pheochromocytoma component. The gene discussed is UCHL1; the disease is hereditary pheochromocytoma-paraganglioma.