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Abstract
We experienced a rare case of parosteal lipoma, which located on the periosteum of the foot 4th metatarsus. A 22-year-old woman visited the hospital with painful mass in her foot. Based on the assessment of plain radiographs, computed tomography scan, and magnetic resonance image, it was suspected as lipoma. Marginal excision was performed and parosteal lipoma was confirmed histologically. Any local recurrence and complications were not observed in 2 years after surgery.
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References
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 | Figure 1.Preoperative photographs showed a focal, ovalshaped protrusion in the dorsal surface of 4th metatarsal base. (A) Anteroposterior view. (B) Lateral view. |
 | Figure 2.Preoperative plain radiographs showed an ovalshaped radiolucent lesion around 4th metatarsal base. (A) Anteroposterior view. (B) Oblique view. |
 | Figure 3.Preoperative computed tomography scan showed that the mass did not communicate with the adjacent bone and had cortical irregularity and hyperostosis at 4th metatarsal base. |
 | Figure 4.Preoperative axial T2-weighted magnetic resonance image showed ossified mass with high signal intensity. |
 | Figure 5.(A) Intraoperative photograph showed oval shaped mass attached to 4th metatarsus. (B) The cortical bone of the metatarsus was intact after excision of mass. |
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