Clin Orthop Surg.  2015 Sep;7(3):418-421. 10.4055/cios.2015.7.3.418.

Superficial Fibromatosis Mimicking Glomus Tumor of the Second Toe

• Jo HJ
• Chae SU
• Kim GD
• Kim YJ
• Choi DH
• Park JI

• KMID: 2234102
• DOI: http://doi.org/10.4055/cios.2015.7.3.418

Abstract

Various types of tumor can occur in the subungual space, including glomus tumors, subungual exostosis, hemangioma, epidermal cysts, and malignant tumors. While fibromatosis can occur at various sites throughout the body, it is very rarely seen in the toe. Here, we are the first to report a case of superficial fibromatosis mimicking a glomus tumor in the subungual space of the second toe. The presentation of this condition shows the possibility of encountering uncommon superficial fibromatosis in the distal phalanx of the toe, and suggests that superficial fibromatosis should be included in the differential diagnosis of a glomus tumor in the toe.

Keyword

Fibromatosis; Glomus tumor; Toe

MeSH Terms

Adult
*Fibroma
*Glomus Tumor
Humans
Male
*Osteochondroma
*Toes/pathology/surgery

Figure

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  Fig. 1 Radiographs of the left foot showing the focal osteolytic lesion with a subtle sclerotic margin in the distal phalanx of second toe.

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  Fig. 2 Coronal T1-weighted (A), sagittal T2-weighted (B), and sagittal gadolinium-enhanced fat-saturated T1-weighted (C) magnetic resonance imaging scans of the left foot showing the approximate 0.7 × 0.6 × 0.5 cm well-marginated osteolytic lesion and low-signal rim with iso signal intensity on T1-weighted and high signal intensity on T2-weighted images compared to adjacent muscles, and homogeneous contrast enhancement in the distal phalanx of the second toe (arrowheads).

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  Fig. 3 The gross specimen shows a grayish white soft tissue.

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  Fig. 4 Intraoperative photographs showing the nail bed longitudinal incision and reattachment of the removed nail as a nail bed protector.

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  Fig. 5 The tumor shows cellular proliferation of bland spindled cells arranged into ill-defined long fascicles (H&E, ×40).

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  Fig. 6 The tumor cells are spindle cells without nuclear atypia (H&E, ×400).

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  Fig. 7 The tumor cells are diffusely immunoreactive for vimentin (immunohistochemical stains, ×200).

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