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Granular cell tumor that originated in a posterior ethmoid sinus
International Journal of Otorhinolaryngology and Head and Neck Surgery
<p class="abstract"><span lang="EN-US">A granular cell tumor (GCT) is a rare neoplasm. It grows slowly, presumably originates from a Schwann cell, and is typically benign. Histopathologically, GCTs are composed of loosely infiltrating sheets of large, pale, polyhedral cells with abundant granular eosinophilic cytoplasm and a pale, centrally situated nucleus. Immunohistochemically, GCTs express the S-100 protein and neuron-specific enolase. A GCT can occur anywhere in the body. Half of all GCTsdoi:10.18203/issn.2454-5929.ijohns20173054 fatcat:wwtpuc54hbd5fikeh6feqaaizm