PMC5301119_01
a, b Clinical photographs of ungual fibromas (arrows). c Histopathological analysis of a skin biopsy obtained from a papule at the proximal nail fold, consistent with an ungual fibroma.
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F1
Fig. 1). Further, total body skin inspection revealed multiple hypopigmentated maculae at the trunk and a slightly elevated skin-colored plaque at the lower back. These findings were consistent with a diagnosis of ungual fibroma, also known as a Koenen tumor (see Fig. 1).
a Clinical photograph of a Shagreen patch (arrow). b Histopathological analysis of a skin biopsy obtained from a plaque at the lower trunk, consistent with a Shagreen patch.
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F2
Histopathological analysis of a skin biopsy of the plaque at the lower trunk showed thickened bundles of collagen within the dermis with widely spaced, diminished, and fragmented elastic fibers, consistent with a collagenoma (see Fig. 2).