“…Bone marrow transplantation into irradiated mice and subsequent normal animal marrow transplantation revealed that MCLs appeared in the marrow and tissues of recipient mice. According to some authors, eosinophilic granule cells (EGC) are similar to mammalian MCLs, and these cells produce histamine, which has been demonstrated directly or indirectly with antihistamine drugs such as diphenhydramine [ 4 , 5 , 6 ].…”