PMC3205494_01
(a) MRI scan demonstrating intraspinal PMS. Tu = tumor. (b) The spinal cord is displaced to the right (asterisk), along with erosion and enlargement of the right T6-T7 intervertebral foramen and extension into the posterior mediastinum
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F1
Erosion of the right T7 and T8 pedicles was observed on computed tomography (CT) scan [Figure 1a], and a magnetic resonance imaging (MRI) scan revealed a 3.0 x 2.0 x 1.5 cm, right enhancing, T6-8 extradural mass [Figure 1b] with transforamenal extension into the mediastinum.
(a) Epithelioid pattern of tumor cells with dense intracytoplasmic melanin granules by H and E stain (magnification x400). (b) Large psammoma body in the center. Large amount of melanin throughout the area of the tumor (H and E, x400)
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F2
PMC3205494_02
Pelvic CT scan reveals a large tumor mass (black arrowheads) with erosion and destruction of the right sacrum. Retroperitoneal extension of tumor has infiltrated into the right iliacus (IL) and psoas (P) muscles
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F3
Eighteen months later, an MRI scan revealed a recurrent tumor in the right sacrum [Figure 3] with retroperitoneal extension infiltrating the right iliacus and psoas muscles.