Solitary fibrous tumor of buccal mucosa: A rare entity

Document Type : Case Report(s)

Authors

1 FCPS Resident, Department of Oral and Maxillofacial Surgery, Abbasi Shaheed Hospital, Karachi, Pakistan

2 Professor, Department of Oral and Maxillofacial Surgery, Abbasi Shaheed Hospital, Karachi, Pakistan

3 MCPS Resident, Department of Oral and Maxillofacial Surgery, Abbasi Shaheed Hospital, Karachi Medical and Dental College, Karachi, Pakistan

4 Associate Professor, Department of Pathology and Laboratory Medicine, Aga Khan University Hospital, Karachi, Pakistan

Abstract

BACKGROUND AND AIM: Solitary fibrous tumor (SFT) is a quite uncommon tumor that commonly occurs in the pleura but occasionally involves an oral cavity. We are reporting this rare case in the oral cavity. The diagnosis depends on microscopic and immunohistochemical features. Patients with these tumors can be carefully treated with local excision, but tumors with positive margins necessitate close follow-up over several years due to the possible late local recurrence.
CASE REPORT: A 60-year malepatient came in the maxillofacial department in Abbasi Shaheed Hospital, Karachi, Pakistan with swelling for the past 5 years which slowly increased in size with no history of pain. The excisional biopsy was performed under local anesthesia. Histopathological examination showed a well-circumscribed spindle cell tumor with alternating hypo and hypercellular areas with prominent collagenous stroma. Immunohistochemistry (IHC) investigation led to the positive expression of Cluster of Differentiation 34 (CD34) and Signal Transducer and Activator of Transcription-6 (STAT-6) in the spindle cells, and negative expression of Anti-Smooth Muscle Antibody (ASMA). Recurrent or postoperative complications were not observed over some time.
CONCLUSION: SFT in the buccal mucosa of the cheek is a very sporadic condition. It needs to be identified with proper history and clinical examination.

Keywords


  1. Bauer JL, Miklos AZ, Thompson LD. Parotid gland solitary fibrous tumor: A case report and clinicopathologic review of 22 cases from the literature. Head Neck Pathol 2012; 6(1): 21-31.
  2. Gold JS, Antonescu CR, Hajdu C, Ferrone CR, Hussain M, Lewis JJ, et al. Clinicopathologic correlates of solitary fibrous tumors. Cancer 2002; 94(4): 1057-68.
  3. Carlos R, de Andrade BA, Canedo NH, Abrahao AC, Agostini M, de Almeida OP, et al. Clinicopathologic and immunohistochemical features of five new cases of solitary fibrous tumor of the oral cavity. Oral Surg Oral Med Oral Pathol Oral Radiol 2016; 121(4): 390-5.
  4. Yang XJ, Zheng JW, Ye WM, Wang YA, Zhu HG, Wang LZ, et al. Malignant solitary fibrous tumors of the head and neck: A clinicopathological study of nine consecutive patients. Oral Oncol 2009; 45(8): 678-82.
  5. Sousa AA, Souto GR, Sousa IA, Mesquita RA, Gomez RS, Jham BC. Solitary fibrous tumor of the parotid gland: Case report. J Clin Exp Dent 2013; 5(4): e208-e211.
  6. Cox DP, Daniels T, Jordan RC. Solitary fibrous tumor of the head and neck. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2010; 110(1): 79-84.
  7. Mupas-Uy J, Kitaguchi Y, Takahashi Y, Takahashi E, Kakizaki H. Solitary fibrous tumor in the lacrimal gland fossa: A case report. Case Rep Ophthalmol 2016; 7(2): 398-403.
  8. Morales-Cadena M, Zubiaur FM, Alvarez R, Madrigal J, Zarate-Osorno A. Solitary fibrous tumor of the nasal cavity and paranasal sinuses. Otolaryngol Head Neck Surg 2006; 135(6): 980-2.
  9. Smith SC, Gooding WE, Elkins M, Patel RM, Harms PW, McDaniel AS, et al. Solitary fibrous tumors of the head and neck: A multi-institutional clinicopathologic study. Am J Surg Pathol 2017; 41(12): 1642-56.

10. Fletcher CD. The evolving classification of soft tissue tumours: An update based on the new WHO classification. Histopathology 2006; 48(1): 3-12.

11. Chang YL, Lee YC, Wu CT. Thoracic solitary fibrous tumor: Clinical and pathological diversity. Lung Cancer 1999; 23(1): 53-60.

12. Doyle LA, Vivero M, Fletcher CD, Mertens F, Hornick JL. Nuclear expression of STAT6 distinguishes solitary fibrous tumor from histologic mimics. Mod Pathol 2014; 27(3): 390-5.

13. Smith MH, Islam NM, Bhattacharyya I, Cohen DM, Fitzpatrick SG. STAT6 reliably distinguishes solitary fibrous tumors from myofibromas. Head Neck Pathol 2018; 12(1): 110-7.

14. Raghani N, Raghani MJ, Rao S, Rao S. Hemangiopericytoma/solitary fibrous tumor of the buccal mucosa. Ann Maxillofac Surg 2018; 8(1): 151-3.

15. Migita M, Yoshino M, Kobayashi D, Shiomi S, Enatsu K, Shigematsu S, et al. A large solitary fibrous tumor of the tongue. J Oral Maxillofac Surg 2012; 70(4): 871-4.

16. Anders JO, Aurich M, Lang T, Wagner A. Solitary fibrous tumor in the thigh: Review of the literature. J Cancer Res Clin Oncol 2006; 132(2): 69-75.