PMC4681130_01
Axial T1-weighted magnetic resonance images without (a) and with (b) gadolinium demonstrating a 7-cm homogeneously enhancing left neck mass circumferentially encasing the left internal carotid artery, extending from C2 to C4. Sagittal (c) and axial (d) T2-weighted magnetic resonance images, again showing the left neck mass encasing the left internal carotid artery
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F1
The initial evaluation consisted of magnetic resonance and computed tomographic (CT) imaging that demonstrated a 7-cm mass with T1 signal and T2 signal contrast enhancement [Figure 1].
Mid-to-late arterial phase of a left common carotid artery injection before (a) and after coil embolization (b) of the common, internal, and external carotid showing reduced vascularity of the mass
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F2
There was no pedicle large enough to be suitable for embolization [Figure 2].
(a) Hematoxylin and eosin (H and E) stain at low-power magnification (x40) demonstrating lymph node hyperplasia with vascular proliferation magnification. (b) H and E stain at high-power magnification (x200) showing follicle containing a centrally located single prominent radiating vessel and concentric rings of mantle zone lymphocytes, characteristic of Castleman's lymphadenopathy
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F3
The lymph node showed distinctive features including follicles composed of concentric rings of mantle zone lymphocytes around germinal centers as well as prominent vascularity of the germinal centers, often showing a single penetrating arteriole [Figure 3a and b].