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. 2016 Nov;5(5):590-592.
doi: 10.3892/mco.2016.1007. Epub 2016 Aug 30.

Fibular juxta-articular ganglion: A rare case report and literature review

Xiaobo Yan  1 , Zhengliang Zhang  2 , Nong Lin  1 , Tao Xie  1 , Zhaoming Ye  1
Affiliations

Fibular juxta-articular ganglion: A rare case report and literature review

Xiaobo Yan et al. Mol Clin Oncol. 2016 Nov.

Abstract

This is the case report of a 65-year-old man who experienced left calf pain after spraining his left ankle. On magnetic resonance imaging (MRI), a well-defined fluid collection was identified, with low intensity on T1-weighted images and very high intensity on T2-weighted images. On certain slices, a soft tissue mass in the proximal fibula was identified. Following resection of the fibular lesion, histological examination confirmed a benign tumor with cystic elements, described in the current pathology and radiology literature as juxta-articular myxoma. This is a rarely encountered but well-recognised cystic lesion, commonly developing around the knee, that is often misdiagnosed as ganglion cyst, synovial lipoma, lipoma arborescens and pigmented or non-pigmented villonodular synovitis. Given its more cellular nature and thicker encapsulation, juxta-articular myxoma may be differentiated from ganglion cyst on MRI with a high index of suspicion, and it is crucial that it is recognized due to its high rate of recurrence. In the present case, the localization of this lesion within the fibula was uncommon, and there was also a soft tissue mass identified outside the bone. Wide resection of the lesion was performed. Recovery was uneventful and the patient remains symptom- and recurrence-free at 8-months follow-up.

Keywords: fibular; juxta-articular ganglion; knee.

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Figures

Figure 1.
Figure 1.
A lesion was identified in the proximal fibula, with breakthrough of the cortical of the fibula on computed tomography scan.
Figure 2.
Figure 2.
On magnetic resonance imaging, the lesion exhibited (A) low intensity on T1-weighted images and (B) very high intensity on T2-weighted images.
Figure 3.
Figure 3.
A soft tissue mass growing out of the fibula was identified on magnetic resonance imaging scan.
Figure 4.
Figure 4.
Examination of the frozen section biopsy revealed a wall consisting of a fibrous capsule and bone tissue, indicating a benign lesion (magnification, ×100).
Figure 5.
Figure 5.
The histological examination confirmed that the lesion was an intraosseous ganglion (magnification, ×100).
See this image and copyright information in PMC

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