Vetters J M, Macadam R F
J Clin Pathol. 1973 Mar;26(3):194-7. doi: 10.1136/jcp.26.3.194.
The epithelial cells of the Hassall's corpuscles in 11 human thymus glands (nine cases of myasthenia gravis and two glands from patients undergoing surgical correction of congenital heart disease) have been examined by electron microscopy. In every instance the epithelial cells have the cytoplasmic organelle complex necessary for ;export'-type secretory activity and in addition contain large numbers of membrane-limited small spheroidal secretion granules.Hassall's corpuscles are avascular anatomical units and a pericorpuscular zone, at least 50 mum broad, is also without blood vessels. It is therefore suggested that the secretory product(s) of the corpuscular epithelial cells has a purely intrathymic function.
对11例人类胸腺（9例重症肌无力患者以及2例接受先天性心脏病手术矫正患者的胸腺）中哈氏小体的上皮细胞进行了电子显微镜检查。在每一个实例中，上皮细胞都具有“输出”型分泌活动所需的细胞质细胞器复合体，并且还含有大量膜包被的小球状分泌颗粒。哈氏小体是无血管的解剖单位，至少宽50微米的小体周围区域也没有血管。因此，有人提出小体上皮细胞的分泌产物具有纯粹的胸腺内功能。
