case_images: PMC2637121_01
case_images: Sagittal T1-weighted magnetic resonance image of the right hand showing a giant cell tumor of tendon sheath involving the ulnar neurovascular bundle at Guyon's canal. The red arrow indicates the ulnar neurovascular bundle. The white arrow indicates the mass.
case_images: eplasty09e08_fig1.jpg
case_images: PMC2637121_01_eplasty09e08_fig1.jpg
case_images: F1
case_images: A follow-up magnetic resonance imaging (MRI) noted a 2.2 x 2.4 x 2-cm bi-lobed mass within the hypothenar musculature, which appeared to be displacing the ulnar artery and ulnar nerve (Fig 1).
case_images: Operative view of the giant cell tumor of tendon sheath entangled in the ulnar nerve. The blue loop is holding the superficial branch of ulnar nerve. The white arrow indicates the ulnar artery. The black arrow indicates the ulnar nerve.
case_images: eplasty09e08_fig2.jpg
case_images: PMC2637121_01_eplasty09e08_fig2.jpg
case_images: F2
case_images: The mass was intertwined with the superficial and deep palmar branches of the ulnar nerve proximal to where the deep palmar branch of the ulnar nerve enters the hypothenar tunnel and was impinging upon the ulnar artery (Fig 2).
case_images: The removed mass.
case_images: eplasty09e08_fig3.jpg
case_images: PMC2637121_01_eplasty09e08_fig3.jpg
case_images: F3
case_images: A 2.5-cm, well-circumscribed, bi-lobed mass was removed and sent for pathological evaluation, which indicated a GCTTS (Fig 3).
case_images: The patient's hand postoperatively.
case_images: eplasty09e08_fig4.jpg
case_images: PMC2637121_01_eplasty09e08_fig4.jpg
case_images: F4
case_images: Four months postoperatively, the patient had fully restored sensory and motor function of the right hand (Fig 4).