A 35-year-old male presented with an asymptomatic skin coloured raised lesion on right forearm for past 3 months. The lesion increased gradually in size over 3 months. Patient complained of pain in lesion on trivial trauma.
Cutaneous examination showed single, skin coloured, sessile, soft to firm and smooth surfaced papule of size about 0.5 × 0.5 cm on extensor surface of right forearm [Figure 1]. Tenderness could be elicited on palpation. Rest of the physical examination was normal.
Figure 1.
Skin coloured, sessile papule on extensor aspect of right forearm
An excision biopsy of the lesion was done. Histopathology showed a solid-cystic tumor islands in the dermis without any connection to epidermis [Figure 2]. This tumor mass consisted of two types of cells [Figure 3], dark cells having round nuclei and scant cytoplasm and pale cells with round nuclei and ample cytoplasm [Figure 4]. At places, duct-like structures were seen within the tumor island [Figure 4]. The stroma was vascular and showed eosinophilic hyaline material deposition. No cytologic atypia or mitotic figures were seen.
Figure 2.
Solid-cystic tumor islands in the dermis without any connection to epidermis (H and E, ×25)
Figure 3.
Tumor masses, on higher magnification showing two types of cells (H and E, ×200)
Figure 4.
Dark and pale cells with ducts within the tumor islands (H and E, ×400)
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