PMC3994694_01
A 22-year-old male patient (case 1). (a) CT after injection of contrast medium shows an extra-axial left parietal tumor with strong enhancement, which was removed completely on first operation. (b) CT of left temporal tumor recurrence 29 months after first operation, which again was removed completely on second operation. (c) CT of intraorbital retrobulbar tumor recurrence 12 months after second operation
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F1
Imaging showed a large extracranial space-occupying dura-based mass [Figure 1].
Same patient. Tumor after resection (a) and histology of this specimen (b) and of resected lymph node (c) histiocytes with large, pale nuclei and abundant cytoplasm containing several engulfed lymphocytes (emperipolesis). H and E, x200 and x400
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F2
Lymph node and intracranial biopsy findings were compatible with RDD showing the emperipolesis phenomenon [Figure 2] and a positive S-100 reaction.
PMC3994694_02
A 39-year-old male patient (case 2). CT after injection of contrast medium shows four enhancing lesions in a left fronto-temporal, parietal/paramedian, occipital, and right central/periventricular localization. On first operation, the fronto-temporal, and on second operation 2 years later, the parietal tumor was removed
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F3
Computed tomography (CT) showed four space-occupying hyperdense lesions with prominent surrounding edema and enhancement in a left fronto-temporal, parietal/paramedian, occipital, and right central/periventricular localization [Figure 3].