PMC5739088_01
A glomus tumor of the hypothenar eminence. Photo from clinical examination shows a hyperkeratotic papule. Note the resemblance of a foreign body.
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PMC5739088_01_gr1.jpg
fig1
On examination, she had a single 2-mm tender, hyperkeratotic brown papule at the hypothenar eminence of her right hand (Fig 1).
Glomus tumor viewed with dermoscopy shows brown concentric rings.
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PMC5739088_01_gr2.jpg
fig2
Dermoscopy found a lesion with concentric rings (Fig 2).
A, Round cells proliferating intradermally, with vesicular nuclei and without mitotic activity. Admixed vessels were identified (H&E stain). B, Immunohistochemical stain for smooth muscle actin.
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PMC5739088_01_gr3.jpg
fig3
Immunohistochemical staining was positive for smooth muscle actin and negative for S100 protein, suggestive of a glomus tumor (Fig 3).