PMC4163445_01
CECT (sagittal section) showing large solid-cystic mass occupying abdominopelvic region.
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CECT (contrast enhanced computed tomography) features were suggestive of a large, lobulated, relatively well-defined, heterogeneously enhancing solid-cystic mass in abdominopelvic region (Figure 1).
CECT showing large solid-cystic mass arising from sacrococcygeal region.
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Mass was extending up to the margin of pancreas in superior direction and inferiorly it was arising from rectovesical pouch displacing bladder anteriorly and rectum posterolaterally (Figure 2). Posteriorly it was compressing IVC, aorta and its branches, and common iliac artery (Figure 2).
Intraoperative photograph showing giant tumour with right ureter passing anteriorly.
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Proximal right ureter was dilated and distal part was collapsed and displaced anteriorly over the mass (Figure 3).
Histology of schwannoma showing well-organised spindle cells in a palisade pattern (Antoni A) on the right and less cellular area (Antoni B) on the left.
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Multiple sections examined from the mass showed histological features suggestive of benign schwannoma with areas of haemorrhage and cystic changes with focal collection of foamy macrophages (Figure 4).
Immunohistochemistry of tumour showing S-100 positivity.
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Immunohistochemistry was positive for S-100 (Figure 5).