Cauda Canis: Variation of a Tinel’s Sign for a Sciatic Nerve Tumor

Figure 4

(a) H&E high magnification (X200) of Antoni A area with Verocay bodies formation. (b) H&E low magnification (X40) of biphasic spindle cell lesion with cellular Antoni A areas and numerous Verocay bodies formation on the right, along with many hyalinized vessels and fresh hemorrhage, characteristic of schwannoma. Hypocellular area with looser stroma or Antoni B pattern is on the left. Pigment laden macrophages are present around vessels at the bottom of the image, representing evidence of old microbleed.

(a)

(b)