J Korean Foot Ankle Soc.  2016 Sep;20(3):140-144. 10.14193/jkfas.2016.20.3.140.

Painful Osteochondroma of the Hallucal Sesamoid: A Case Report

• Kim DG
• Ahn GY
• Nam IH
• Lee YH
• Lee TH
• Lee YS
• Lee DH

• KMID: 2351421
• DOI: http://doi.org/10.14193/jkfas.2016.20.3.140

Abstract

Osteochondroma is one of the most common bone tumors. It can occur anywhere, although it is most frequent mainly around the metaphysis of long bones. Prediction sites are distal femur, proximal humerus, proximal tibia, and so on. However, osteochondroma in sesamoid is very rare. Herein, we report a case of a 56-year-old woman with symptomatic extra-articular osteochondroma in hallucal sesamoid with a brief literature review.

Keyword

Hallux; Sesamoid; Osteochondroma

MeSH Terms

Female
Femur
Hallux
Humans
Humerus
Middle Aged
Osteochondroma*
Tibia

Figure

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  Figure 1. (A, B) Clinical photographs of preoperative foot status show that a corn on the first metatarsal head area was occurred due to bony protrusion.

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  Figure 2. (A, B) Preoperative radiographs of both feet show a bony mass of tibial sesamoid on big toe of the left foot in the anteroposterior and tangential views (arrows).

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  Figure 3. Axial image (A) and sagittal image (B) of the left foot computed tomographs demonstrate 10×11×8 mm3 sized bony mass with irregular margin from the tibial sesamoid (arrows).

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  Figure 4. On the magnetic resonance images, axial view (A) and sagittal view (C) of T1-weighted image show low signal intensity of bony mass (arrows). Axial view (B) and sagittal view (D) of T2-weighted image also show low signal intensity of bony mass (arrows).

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  Figure 5. We exposured the osteochondroma (A) and excised mass (B).

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  Figure 6. After excision of bony mass, there is no more bony protrusion of the medial sesamoid (arrow).

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  Figure 7. In the microscopic findings of the osteochondroma (H&E stain; A: ×40, B: ×100), the mature bone is covered with cartilaginous cap and thick fibrous capsule. Also these slides show well developed mature hyaline cartilage and it change into mature trabecular bone.

Reference

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