2011, Number 2
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Gac Med Mex 2011; 147 (2)
A 33 year old woman with a six-year history of slight thoracic-abdominal pain
Cárdenas-Escudero MA, Shuchleib-Chaba S, Muruchi-Garrón GW, León-Bojorge B, Ortiz-Hidalgo C
Language: Spanish
References: 18
Page: 163-168
PDF size: 131.73 Kb.
ABSTRACT
We present a case of a benign hybrid nerve sheath tumor showing features of both cellular schwannoma and perineurioma. The patient was a 33 year-old female who presented with a 6 month history of pain in the thorax-lumbar region. Axial CT and MIR images showed and homogeneously enhancing solid oval mass involving the left paravertebra region in contact with the vertebral foramina T9-T11. Morphologically the tumor presented a well formed capsule and showed a uniform highly spindle cell proliferation. The spindle cells were arranged in whorls and intersecting fascicles with focal intervening sclerosis and relatively uniform cellularity with a prominent perivascular lymphocytic infiltrate. No cytological atypia, necrosis or mitoses were present. A second cell component was present composed of spindle-shaped cells with inconspicuous bipolar, pale, eosinophilic cytoplasm with oval nuclei. By immunohistochemistry there was a diffuse staining for S-100, and the elongated bipolar cells were EMA, Glut-1 and Claudin-1. To our knowledge this is the first reported case of a hybrid cellular schwannoma/perineurioma.
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