Figure 6: The Hassall’s corpuscles with calcification and thymic involution. (a); Many number of Hassall’s corpuscles from 4 years old girl who died due to sepsis, are changed into calcification, and involution of the thymus was sever. (b); Hassall’s corpuscles with partial calcification were observed in a 14 years old boy who died due to subdural bleeding after two weeks of his head injury. The involution was not severe.