Antoni type B neurilemoma

An·to·ni type B neu·ri·le·mo·ma

(ahn'tō-nē),
relatively soft or loose arrangement of neoplastic tissue that consists of Schwann cells in a haphazard or nondescript type of arrangement among reticulin fibers and tiny cystlike foci; fat-laden macrophages may be observed in some of the larger neoplasms.

Antoni,

Nils, Swedish neurologist, 1887-1968.
Antoni type A neurilemoma - relatively solid or compact arrangement of neoplastic tissue that consists of Schwann cells arranged in twisting bundles associated with delicate reticulin fibers.
Antoni type B neurilemoma - relatively soft or loose arrangement of neoplastic tissue that consists of Schwann cells in a nondescript arrangement among reticulin fibers and tiny cystlike foci.