Sonic tumor cells had nuclear goovas. 3 cases showed abundant mitochondria, rough endoplasm reticulum. neurosecretory granules, prozymogen-granule-like particles and annulate lamellae.

瘤胞有丰富线粒体及粗面内质网，可到神经分泌颗粒，酶原样颗粒及特征状板层体。