PMC2637121_01
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.
eplasty09e08_fig1.jpg
PMC2637121_01_eplasty09e08_fig1.jpg
F1
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).
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.
eplasty09e08_fig2.jpg
PMC2637121_01_eplasty09e08_fig2.jpg
F2
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).
The removed mass.
eplasty09e08_fig3.jpg
PMC2637121_01_eplasty09e08_fig3.jpg
F3
A 2.5-cm, well-circumscribed, bi-lobed mass was removed and sent for pathological evaluation, which indicated a GCTTS (Fig 3).
The patient's hand postoperatively.
eplasty09e08_fig4.jpg
PMC2637121_01_eplasty09e08_fig4.jpg
F4
Four months postoperatively, the patient had fully restored sensory and motor function of the right hand (Fig 4).