Publication: Triton tumor of the parotid area. Case report
Authors
Llanes, F. ; Sanz Ortega, J. ; Suarez, B. ; Sanz Esponera, J.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
A 27-year-old woman with a Malignant
Triton Tumor (MTT), or malignant schwannoma with
rhabdomyoblastic differentiation, located in the parotid
cell and infiltrating the nasal sinuses and the left orbit is
described. The initially resected tumor showed three
recurrences within a 2 years follow-up period. During
successive recurrences an increase in cellular density,
number of mitoses and necrosis was noticed. Immunohistochemical
analysis showed that the tumor was
composed of a mixed population of cells. Some of them
showed positivity for actin, desmin and myoglobin,
while others were positive for S-100 protein, glial
fibrillary acid protein, and IV-collagen. Cytokeratin
stainings were negative. Up to now, 8 benign triton
tumors and another 45 cases of MTT have been
described. None of them was primarily located in the
parotid gland, and infiltration to the orbital cavity has
not been previously described.
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