PMC4901819_01
Axial section of computed tomography scan (a) showing an intra-osseous bony neoplasm. Bone window of axial section (b) and sagittal section (c) showing classical sunburst pattern of bony tumor. Expansion and thinning of inner and outer table is obvious. Axial section of magnetic resonance imaging scan showing hypo-intense signal indicating loss of fat on T1-weighted imaging (d) and hyper-intense signal on T2-weighted imaging (e). Sagittal section of contrast-enhanced magnetic resonance imaging scan (f) showing intra-osseous tumor over torcula
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F1
Magnetic resonance imaging (MRI) scans showed an extra-axial lesion which was iso-intense on T1-weighted imaging (T1WI) and hyper-intense on T2-weighted imaging (T2WI), enhancing brilliantly on contrast administration [Figures 1a-f and 2a, b].
Coronal section of contrast-enhanced magnetic resonance imaging scan (a), sagittal section of T2-weighted imaging scan (b) showing intact inner table and no intradural invasion of tumor. Microphotograph (c) showing cystically dilated blood vessels in the inter-trabecular marrow spaces (H and E, x40). Higher magnification (d) depicting single layer of endothelial lining (H and E, x400). Follow-up contrast-enhanced axial (e) and coronal section (f) magnetic resonance imaging scans showing total excision of cavernous hemangioma
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F2
Magnetic resonance imaging (MRI) scans showed an extra-axial lesion which was iso-intense on T1-weighted imaging (T1WI) and hyper-intense on T2-weighted imaging (T2WI), enhancing brilliantly on contrast administration [Figures 1a-f and 2a, b]. Tumor, with a rim of normal bone, was excised completely and sent for histopathology which showed large thin-walled vascular channels with small thin walled and angulated capillary sized blood filled vessels, suggestive of a cavernous hemangioma of occipital bone [Figure 2c and d]. Postoperatively, patient made an eventless recovery and follow-up radiology depicts total excision of hemangioma [Figure 2e and f].