J Korean Foot Ankle Soc.  2017 Dec;21(4):170-173. 10.14193/jkfas.2017.21.4.170.

Bilateral Hypertrophy of Abductor Digiti Minimi Simulating a Localized Soft Tissue Mass: A Case Report

• Jung YH
• Song WS
• Eun DC

• KMID: 2398016
• DOI: http://doi.org/10.14193/jkfas.2017.21.4.170

Abstract

Soft tissue tumors of the foot have a low incidence rate, and most of them are symptom free, thus it is difficult to diagnose accurately. Herein, we report a 15-year-old male patient who had swelling without pain on the lateral margin of both feet. We performed excisional biopsy of the abductor digiti minimi via subtotal resection, following radiograph and magnetic resonance imaging. According to the histological analysis, hypertrophy of abductor digiti minimi was positive, and other soft tissue tumors were negative. Six months after the operation, normal appearance of both feet was maintained and the patient was satisfied with the result.

Keyword

Foot; Muscle hypertrophy; Abductor digiti minimi muscle

MeSH Terms

Adolescent
Biopsy
Foot
Humans
Hypertrophy*
Incidence
Magnetic Resonance Imaging
Male

Figure

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  Figure 1 Soft tissue mass at the lateral aspect of the both foot was shown at first presentation. (A) Anterior view. (B) Right angular view. (C) Left angular view.

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  Figure 2 Diameters of the abductor digiti minimi muscles of both feet at first presentation were 20.7 mm on the left side (A) and 18.4 mm on the right side (B) on ultrasound scan.

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  Figure 3 Magnetic resonance imaging of both feet at first presentation showed diffuse muscular swelling and clear accentuation of the abductor digiti minimi muscle in the both foot. (A) Left side. (B) Right side.

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  Figure 4 (A, B) The left side hypertrophic abductor digiti minimi muscle and the excised specimens were shown intraoperatively.

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  Figure 5 Microscopic view of the specimen was taken during the operation (H&E stain, ×10) showing hyperplasia and hypertrophy of the skeletal muscle tissue.

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  Figure 6 Six months after the operation, normal appearance of both feet was maintained. (A) Anterior view. (B) Right angular view. (C) Left angular view.

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