Although nearly half of all schwannomas involve the head and neck region. nasal and paranasal sinus presentations are quite rarely seen. Cystic schwannoma. characterized by cyst formation lined by S-100 protein positive membrane-like structures is very uncommonly seen in sphenoid sinus with only a single previously reported case. https://www.ngetikin.com/quick-sale-Korpskaft-Hultafors-great-choice/