• Journal of Korean Orthopaedic Sports Medicine
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• v.11 no.2
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• pp.87-91
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• 2012

Nonunion of the hallucal sesamoid usually occurs after stress fracture. In case of persistent disabling symptoms after non-operative treatment, surgery can be an option. We report a rare case of combined stress fractures of the medial bipartite sesamoid and the lateral sesamoid after overuse. Nonunion of the medial sesamoid developed in spite of cast immobilization, and it was eventually healed with curettage and bone grafting.

• 대한족부족관절학회:학술대회논문집
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• 2009.04a
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• pp.4-4
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• 2009

• Journal of Korean Foot and Ankle Society
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• v.10 no.1
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• pp.96-100
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• 2006

Gout in the sesamoid of the great toe is very rare, such that to our best knowledge, there have been only four reports internationally. We present a case of hallucal medial sesamoid gout in the respect of the literature review, clinical, pathological features and surgical outcome.

• Journal of Korean Foot and Ankle Society
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• v.17 no.3
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• pp.239-242
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• 2013

A sesamoid bone can occasionally be found under the interphalangeal joint of the hallux. These had anatomical variants and usually remain asymptomatic, it is uncommon for symptomatic cases of painful plantar keratoses or irreducible dislocation of interphalangeal joint of the hallux with incarcerated sesamoid. While the latter has a few cases, the former has not reported in Korea. We experienced a rare case of intractable plantar keratoses due to interphalangeal sesamoid bone of the hallux which may reqire excision.

• Journal of Korean Foot and Ankle Society
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• v.13 no.2
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• pp.184-188
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• 2009

Although avascular necrosis of the hallucal sesamoid has not been frequently addressed in the literature, it should be considered in the differential diagnosis of persistent forefoot pain. We experienced 3 cases of avascular necrosis of the hallucal sesamoid with sclerosis of the sesamoid bone on radiograghs and computed tomograghy images. T1 and T2-weighted MRI images in 2 patients showed low signal intensity in the sesamoid bone, which suggested osteonecrosis and confirmed by histology. We report 3 cases of avascular necrosis of sesamoid with a review of the literature.

• Journal of Korean Foot and Ankle Society
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• v.10 no.2
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• pp.279-283
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• 2006

Irreducible dislocation of great toe interphalangeal joint with incarcerated sesamoid is a rare condition, with only a few cases reported in literature. We describe two cases of dislocation of interphalangeal joint which were diagnosed by plain radiographs and three dimensional computed tomography (3D-CT) and successfully treated with open reduction without excision of sesamoid through dorsal approach along with literature pertinent to this condition.

• Journal of Korean Foot and Ankle Society
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• v.24 no.3
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• pp.120-123
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• 2020

Heterotopic ossification is the formation of extra-skeletal bone in the muscle and soft tissues, and an osteoma is a benign bone-forming tumor composed of compact or mature trabecular bone limited almost exclusively to the craniofacial bones. This paper reports an extremely rare case of heterotopic ossification mimicking an osteoma that occurred independently at the plantar side of the medial sesamoid bone. The patient was a 46-year-old male with a three-month history of pain and a hard mass on the plantar aspect of the left forefoot sole. After excising the lesion, the patient's symptoms were relieved, and no pain or complications occurred. This paper discusses this exceedingly rare case of heterotopic ossification around the medial sesamoid bone with a review of the relevant literature.

• Journal of Korean Foot and Ankle Society
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• v.20 no.3
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• pp.140-144
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• 2016

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.

• Journal of Korean Foot and Ankle Society
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• v.13 no.2
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• pp.138-141
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• 2009

Purpose: Regardless of potential and actual complications, the sesamoidectomy either tibial side or fibular side or both, had been used as a surgical option for various pathologic conditions. The objective of this cadaveric study was to identify the changes of range of motion of great toe after sesamoidectomy. Material and Methods: Eight fresh cadaver legs were used. The angular changes of the hallucal articulations were measured by traction of the flexor hallucis longus tendon at the proximal border of fibro-osseous tarsal tunnel and by traction of the extensor hallucis longus tendon at the superior border of inferior extensor retinaculum. The measurement started at neutral position and proceeded to the maximum for respective tendons. After sesamoidectomy either partial or total, same procedures were repeated and the angular changes were measured. Results: In flexion of great toe, there were significant metatarsophalangeal angular differences at 1 cm traction in total sesamoidectomy and lateral sesamoidectomy. In extension of great toe, there were significant metatarsophalangeal angular differences at more than 2 cm traction in total sesamoidectomy. In other measurements, there were no significant angular changes of the hallucal articulations. Conclusion: The sesamoidectomy resulted in change of motion of great toe. Statistical analysis showed that the significant increases in the initial flexion and maximal extension occurred with total sesamoidectomy and the significant increase in the initial flexion occurred with lateral sesamoidectomy.

• Journal of Korean Foot and Ankle Society
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• v.10 no.2
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• pp.242-246
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• 2006

Purpose: Frequency of sesamoid bone on hallucal interphalangeal joint has been described to be low probability in orthopaedic and anatomical literature. We have, however, experienced two cases of interphalangeal joint dislocation giving difficulty to usual manipulative reduction because of presence of sesamoid bone recently. In order to ascertain existence of sesamoid bone on interphalangeal joint of hallux in Korean adults, radiological study have been performed with feet of patients Materials and Methods: Between May 2003 and October 2006, 974 patients with 1098 radiographs of feet which were reached skeletal maturity over 18-year-old were examined. Unilateral or bilateral anteroposterior, lateral and oblique radiographs were observed by one same person and presence was recorded if there was sesamoid in films. Distance of long and short axes were measured in lateral view and cases of two sesamoids in interphalangeal joint were recorded. Statistical differences between left and right side or between men and women were evaluated by chi-square test. Results: Frequency of sesamoid was 980 cases (89.3%) and no occurrence in 118 cases (10.7%). Two sesamoids were observed in 3 cases. Average distance of long axis was 4.9 mm (range, 0.5-11.4) and average distance of short axis was 3.5 mm (range, 0.3-9.3). Unilateral sesamoid was observed in 7 patients (5.6%), bilateral absence was 7 patients (5.6%) and bilateral sesamoids in 110 patients (88.8%) out of 124 patients who took bilateral feet radiographs. Men has less frequency than women significantly (p=0.014) while there was no significant difference in frequency according to side(p>0.05). Conclusion: Sesamoid bone was seen in 980 feet (89.3%) out of 1098 normal Korean radiological studies of feet. We report 3 cases of two seamoids which was extremely rarely reported in literature. Korean frequency is similar with Japanese, but much higher than Caucasians and black Africans.