LAUSR

Benign cutaneous adnexal tumors are a heterogeneous group of uncommon lesions that includes spiradenoma and cylindroma. We report a case of coexisting spiradenoma and cylindroma and describe the corresponding dermoscopic findings. A 37-year-old woman with no known medical history of interest was seen for an asymptomatic scalp lesion that was located on the hairline and had appeared 6 months earlier. Physical examination revealed a soft, rounded, skin-colored nodule (1 cm in diameter), upon which was a bluish, hardelastic papule (Fig. 1). Dermoscopy revealed a salmon-pink area containing linear vessels on the lesion surface and the presence at the lesion periphery of associated structures with homogeneous blue coloration. Yellowish-brown desquamation corresponding to seborrhoeic eczema was also observed (Fig. 1). An excisional biopsy was performed. Subsequent histopathology revealed 2 distinct histological patterns. The first, more superficial pattern corresponded to a dermal tumor composed of multiple basophilic nodules formed by strands of dark basaloid cells and larger cells with pale nuclei. Ductal structures were also observed inside the lobes, as well as hyaline drops and squamous corpuscles (Fig. 2). The second pattern, observed in the deepest part of the lesion, consisted of irregular strands of basophilic cells arranged in a checkerboard pattern and surrounded by eosinophilic hyaline bands (Fig. 2). Based on these findings a diagnosis of spiradenocylindroma was established. Spiradenoma, first described by Kersting and Helwing in 1956, is more frequent in females aged 15 to 35 years. The clinical presentation consists of a single, soft, bluish nodule of 1 cm to 2 cm in diameter that is painful on