TODENTJ-25-03-2019_TODENTJ-7-152 1553505488 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 11 13 2013 7 1 Kazuhiko Yamamoto Yumiko Matsusue Miyako Kurihara Yuka Takahashi Tadaaki Kirita A 74-year-old male patient consulted us for an elastic firm mass in the right buccal mucosa. CT examination revealed a well-circumscribed oval cystic lesion in the anterior region of the masseter muscle. On MRI, the lesion showed a low signal on T1-weighted image and a high signal on T2-weighted image. Aspiration biopsy demonstrated the presence of squamous cells in whitish liquid. Under the diagnosis of epidermoid cyst, the lesion was intraorally extirpated under general anesthesia. The lesion was cystic at the size of 30 × 25mm. Histologically, the cyst wall was lined with parakeratinized squamous epithelium corrugated on its surface, the basal layer of which consisted of cuboidal cells showing palisading of the nuclei. Immunohistochemically, the lining epithelium was positive for CK17 and negative for CK10. The basal and suprabasal cells were labeled for Ki-67 at a relatively high rate. These features are compatible with those of keratocystic odontogenic tumor. 11 13 2013 152 156 TODENTJ-7-152 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2013-7-16 2013-9-30 2013-10-1 2013-11-13 http://creativecommons.org/licenses/by-nc/3.0/ 10.2174/1874210601307010152 1553505488 https://opendentistryjournal.com/VOLUME/7/PAGE/152/ https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-152/TODENTJ-7-152.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-152/TODENTJ-7-152.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-152/TODENTJ-7-152.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-152/TODENTJ-7-152.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-152/TODENTJ-7-152.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-152/TODENTJ-7-152.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-152/TODENTJ-7-152.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-152/TODENTJ-7-152.xml Philipsen HP, Barnes L, Eveson JW, Reichart P, Sidransky D, Eds. Keratocystic odontogenic tumour WHO classification of tumours . Pathology and genetics of head and neck tumours.: Lyon: IARC Press 2005; pp. 306-7. J Dent Res Li TJ 90 133 2011 Li TJ. The odontogenic keratocyst: a cyst. or a cystic neoplasm? J Dent Res 2011; 90 : 133-42. Oral Surg Oral Med Oral Pathol Oral Radiol Endod Chi AC 99 71 2005 Chi AC, Owings JR, Muller S. Peripheral odontogenic keratocyst: report of two cases and review of the literature Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2005; 99 : 71-8. Coll Antropol Valter K 26 Suppl 177 2002 Valter K, Pavelic B, Katanec D, et al. Evaluation of sporadic cases of odontogenic keratocysts in multicentric study Coll Antropol 2002; 26 Suppl : 177-82. Jpn J Oral Maxillofac Surg Tanaka K 43 440 2008 Tanaka K, Yunoki H, Muroi Y, Haniwa H, Horii K, Kakudo K. A case of a lesion of the cheek histopathologically resembling keratocystic odontogenic tumor Jpn J Oral Maxillofac Surg 2008; 43 : 440-. J Oral Maxillofac Surg Precheur HV 67 2513 2009 Precheur HV, Krolls SO. An unusual presentation of an odontogenic keratocyst in the buccal space: case report J Oral Maxillofac Surg 2009; 67 : 2513-. Oral Surg Oral Med Oral Pathol Oral Radiol Endod Ide F 110 e42 2010 Ide F, Kikuchi K, Miyazaki Y, Mishima K, Saito I, Kusama K. Keratocyst of the buccal mucosa: is it odontogenic? Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2010; 110 : e42-7. Oral Surg Ide F 2 1 2008 Ide F, Horie N, Shimoyama T, Saito I, Tanaka A, Kusama K. Infrequent clinicopathologic features of keratocystic odontogenic tumour: a 29-year multi-institutional retrospective review Oral Surg 2008; 2 : 1-9. Int J Oral Med Sci Koizumi Y 2 14 2004 Koizumi Y. Odontogenic keratocyst. orthokeratinized odontogenic cyst and epidermoid cyst: an immunohistochemical study including markers of proliferation cytokeratin and apoptosis related factors Int J Oral Med Sci 2004; 2 : 14-22. J Am Acad Dermatol Barr RJ 14 572 1986 Barr RJ, Headley JL, Jensen JL, Howell JB. Cutaneous keratocysts of nevoid basal cell carcinoma syndrome J Am Acad Dermatol 1986; 14 : 572-6. Br J Dermatol Baselga E 135 810 1996 Baselga E, Dzwierzynski WW, Neuburg M, Troy JL, Esterly NB. Cutaneous keratocyst in naevoid basal cell carcinoma syndrome Br J Dermatol 1996; 135 : 810-2. Am J Dermatopathol Cassarino DS 27 177 2005 Cassarino DS, Linden KG, Barr RJ. Cutaneous keratocyst arising independently of the nevoid basal cell carcinoma syndrome Am J Dermatopathol 2005; 27 : 177-8. Am J Dermatopathol Fernandez-Flores A 30 87 2008 Fernandez-Flores A. Cutaneous keratocyst: a renaming as isthmic-anagenic cyst proposal Am J Dermatopathol 2008; 30 : 87-9. Oncol Rep Kurokawa I 16 295 2006 Kurokawa I, Nishimura K, Hakamada A, et al. Cutaneous dermoid cyst: cytokeratin and filaggrin expression suggesting differentiation towards follicular infundibulum and mature sebaceous gland Oncol Rep 2006; 16 : 295-9. Anat Embryol Hovorakova M 209 303 2005 Hovorakova M, Lesot H, Peterka M, Peterkova R. The developmental relationship between the deciduous dentition and the oral vestibule in human embryos Anat Embryol 2005; 209 : 303-13. Eur J Oral Sci Hovorakova M 115 280 2007 Hovorakova M, Lesot H, Vonesch JL, Peterka M, Peterkova R. Early development of the lower deciduous dentition and oral vestibule in human embryos Eur J Oral Sci 2007; 115 : 280-7. Oral Surg Oral Med Oral Pathol Oral Radiol Endod Isomura ET 108 577 2009 Isomura ET, Okura M, Ishimoto S, et al. Case report of extragingival peripheral ameloblastoma in buccal mucosa Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2009; 108 : 577-9. Oral Surg Oral Med Oral Pathol ElSedfyBakry N 43 583 1977 ElSedfyBakry N. An ectopic odontome in the cheek Oral Surg Oral Med Oral Pathol 1977; 43 : 583-4.