Glomus Tumor: “A-Not-So-Rare” Cause of Chronic Shoulder Pain—A Case Report and Literature Review

Figure 5

Histological images of the removed tumor. (a) Well-limited proliferative lesion, with a rich vascular network (hematoxylin-eosin; original magnification ×20). (b) Tumor formed by ovoid, epithelial cells, without signs of atypia and showing no mitoses (hematoxylin-eosin; original magnification ×40). (c) Diffuse expression of smooth muscle actin (alpha-SMA) in the tumor (immunohistochemcial staining; original magnification ×20 (right inferior corner photomicrograph) and original magnification ×100 (larger photomicrograph)).

(a)

(b)

(c)