Schowannoma in an Uncommon Site, Upper Lip: A Case Report
Schwannoma is one of the most common benign intracranial tumors which originates from the Schwann cells of neural sheaths in the upper part of vestibular branch of the eighth nerve, especially in patients with neurofibromatosis type 2. Schwannoma in the other parts of head and neck region is, however, relatively uncommon.The present report describes a rare case of schwannoma that was accidentally discovered in the upper lip in asymptomatic patient lasting for more than 10 years with recently size enlargement. Schwannoma could be seen in a variety of anatomic sites. Thus, this diagnosis should be considered in the differential diagnosis of soft tissue tumor in any location.
 Evans DR. Neurofbromatosis type 2 (NF2): A clinical and molecular review. Orphanet Journal of Rare Diseases. 2009; 4(1):16. [DOI:10.1186/1750-1172-4-16] [PMID] [PMCID]
 Aslan G, Cinar F, Cabuk FK. Schwannoma of the submandibular gland: A case report. Journal of Medical Case Reports. 2014; 8:231. [DOI:10.1186/1752-1947-8-231] [PMID] [PMCID]
 Sahoo K, Shaha PR, Khetawat R, Ilyas MA, Khairnar GR. SolidCystc hypoglossal nerve schwannoma with ﬂuid-ﬂuid level: A rare case report. Journal Of Clinical And Diagnostc Research. 2016; 10(12):TD06-8. [DOI:10.7860/JCDR/2016/23337.9094] [PMID] [PMCID]
 Yamazaki H, Kaneko A, Ota Y, Tsukinoki K. Schwannoma of the mental nerve: Usefulness of preoperatve imaging: A case report. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology. 2004; 97(1):122-6. [DOI:10.1016/S1079- 2104(03)00462-1] [PMID]
 Moradzade Khiavi M, Taghavi Zenouz A, Mesgarzadeh AH, Sabetmehr O, Mahmoudi SM, Kouhsoltani M. Schwannoma in the midline of hard palate: A case report and review of literature. Journal of Dental Research, Dental Clinics, Dental Prospects. 2014; 8(2):114-7. [DOI:10.5681/joddd.2014.021] [PMID] [PMCID]
 Chen CY, Wang WC, Chen CH, Chen YK, Lin LM. Ancient schwannoma of the mouth ﬂoor-A case report and review. Oral Oncology Extra. 2006; 42(8):281-5. [DOI:10.1016/j.ooe.2006.07.002]
 Salehinejad J, Sahebnasagh Z, Saghaf S, Sahebnasagh Z, Amiri N. Intraoral ancient schwannoma: A systematc review of the case reports. Dental Research Journal. 2017; 14(2):87-96. [PMID] [PMCID]
 Gainza-Cirauqui ML, Eguia-Del Valle A, Martnez-Conde R, CocaMeneses JC, Aguirre-Urizar JM. Ancient schwannoma of the hard palate. an uncommon case report and review. Journal of Clinical and Experimental Dentstry. 2013; 5(1):e62-5. [DOI:10.4317/ jced.50950] [PMID] [PMCID]
 Bayindir T, Kalcioglu MT, Kizilay A, Karadag N, Akarcay M. Ancient schwannoma of the parotd gland: A case report and review of the literature. Journal of Cranio-Maxillo-Facial Surgery. 2006; 34(1):38- 42. [DOI:10.1016/j.jcms.2005.08.003] [PMID]
 Subhashraj K, Balanand S, Pajaniammalle S. Ancient schwannoma arising from mental nerve. a case report and review. Medicina oral, patologia oral y cirugia bucal. 2009; 14(1):E12-4.
 Yang SW, Lin CY. Schwannoma of the upper lip: Case report and literature review. American Journal of Otolaryngology. 2003; 24(5):351-4. [DOI:10.1016/S0196-0709(03)00065-6] [PMID]