PMC5458692_01
Magnetic resonance imaging inversion recovery sequence coronal section showing hyperintense lesion located between femoral condyle medially and iliotibial band laterally and limited inferiorly by lateral tibiofemoral joint line.
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F1
The MRI showed a thickened ITB and oval abnormal altered signal intensity lesion appearing heterogeneously hyperintense on inversion recovery sequences (Figs. 1,2), hypointense on T2-weighted images measuring about 4.1 cm x 2.7 cm x 0.8 cm (cephalocaudal X anteroposterior X mediolateral) located between femoral condyle medially and iliotibial band laterally and is limited inferiorly by lateral tibiofemoral joint line.
Microscopic appearance of Fibroma of tendon sheath.
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F3
In the resected nodule, abundant collagen fibers, and spindle-shaped cells were seen and scattered fibroblasts were detected (Fig. 3).