Figure 2: The reactivity of the Hassall’s corpuscles in normal positioned and ectopic thymus with antibodies. The Hassall’s corpuscles showed the same reactivity. Anti glucocoticoid receptor antibody stained the Hassall’s corpuscles from normal positioned thymus (a) and (b) from 5 months girl. Anti MUC 4 also stained the Hassall’s corpuscles from normal positioned thymus (c) and (d) from 3 months boy.