Fig. 2
From: Complex trigger wrist associated with carpal tunnel syndrome: a case report
a Histological examination, hematoxylin and eosin (H&E), 40×: the tumor node is formed by spindle-shaped or oval-shaped cells with rather large nuclei of an elongated, rounded, or polygonal shape. Cells are located loosely in places; in places they form compact clusters. Some nuclei show one or two nucleoli. A morphological picture of the fibroma. b For immunohistochemical analysis, S100 and desmin were used as primary antibodies. S100 was used for differential diagnosis with peripheral nerve tumors—negative immunoperoxidase reaction, 40×. c Focal cytoplasmic expression of desmin was seen after immunoperoxidase reaction, 40×;—it is characteristic of cells with a myoid phenotype and it can be detected in 50% of cases of fibromatosis. This tumor in the development of relapse can also be attributed to fibromatosis, given its localization