Spinal Hamartoma in a Neonate: Unusual Presentation and MR Imaging Findings
H.J.S. Bininga,
G. Saigalc,
R.S. Goswamib,
D. Gilla and
P.D. McNeelyd
a Department of Radiology, McGill University, Montreal, Canada
b Department of Pathology, McGill University, Montreal, Canada
c Department of Radiology, University of Miami, Miami, Fla
d Division of Neurosurgery, IWK Health Center and Dalhousie University, Halifax, NS, Canada
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Fig 1. Large port wine stain of the right arm, upper thorax, and back.
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Fig 2. A, Coronal T2-weighted MR image and (B) axial T2-weighted MR image demonstrate a large cervicothoracic intraspinal tumor with extension to the right paravertebral and brachial plexus region through the right C7 and T1 neural foramen. Tumor shows increased signal intensity on T2-weighted sequences (A, B). The cord is compressed and displaced laterally to the left by the mass (arrow).
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Fig 3. Photomicrograph shows histologic appearance of the lesion and demonstrates the presence of mature cartilage (asterisk) against a background of small- and intermediate-sized vessels, some containing smooth muscle in their walls. Ganglion cells are seen in the center (arrows) (H & E, original magnification x100).
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Fig 4. Photomicrographs show immunohistochemical stains for glial fibrillary acidic protein (A) and neurofilament (B) that demonstrate the presence of mature nerve elements (arrows) within the background stroma of the lesion. A, x40; B, x200.
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Fig 5. Postoperative (A) axial postcontrast fat-saturated T1-weighted and (B) axial T2-weighted MR images demonstrate a residual well-defined enhancing intradural extramedullary mass. There appears to be a disruption in the dura (arrow).
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