case_images: PMC10853662_01
case_images: Mass lesion of the forearm (a). Macroscopically, the lesion is composed of solid and cystic components (b).
case_images: cureus-0016-00000052047-i01.jpg
case_images: PMC10853662_01_cureus-0016-00000052047-i01.jpg
case_images: FIG1
case_images: Upon cutaneous examination, the lesion was solitary, non-tender, and firm, measuring 10 cm with well-defined borders, and no signs of ulceration or surface changes (Figure 1a).
case_images: Photomicrographs of the lesion showing a predominantly cystic mass, with a central lumen (*), and no surrounding capsule (a: HES, x40, and b: HES, x100). The lesion shows both cystic and solid components (c: HES: x100). Solid areas are composed of two types of cells: dark poroid cells (arrows) and eosinophilic cuticular cells (d: HES, x200). At higher magnification, cuticular cells show abundant eosinophilic cytoplasm with a large central nucleus (e: HES, x400). Multiple ducts were seen (arrows), reminiscent of ductal differentiation (f: HES, x400). HES: hematoxylin-eosin-saffron staining.
case_images: cureus-0016-00000052047-i02.jpg
case_images: PMC10853662_01_cureus-0016-00000052047-i02.jpg
case_images: FIG2
case_images: It combined architectural elements resembling those of hidradenoma, including both solid and cystic areas (Figures 2a, 2b, 2c), as well as cytological characteristics of poroma. Both cell types displayed a uniform appearance (Figures 2d, 2e). Some regions within the tumor exhibited duct-like structures (Figure 2f).