Pleomorphic Adenoma Arising from an Atypical Site in the Posterior Cervical Triangle: A Case Report

Year 2025, Volume: 10 Issue: 3, 102 - 104, 31.12.2025

Altan Kaya , Nuri Ünsal

https://doi.org/10.55694/jamer.1694083

Abstract

Pleomorphic adenoma is the most common benign tumor of the salivary glands, typically arising from the parotid, submandibular, and minor salivary glands. However, cases originating from heterotopic salivary gland tissue and developing in atypical locations such as the neck are extremely rare. In this case report, we present a 62-year-old female patient diagnosed with pleomorphic adenoma located in the right posterior cervical triangle of the neck. Clinical evaluation, radiological imaging, and fine-needle aspiration biopsy supported the benign nature of the lesion, which was subsequently excised surgically. Histopathological examination confirmed the diagnosis of benign mixed tumor (pleomorphic adenoma). No recurrence was observed during a two-year follow-up period. This case highlights the importance of considering pleomorphic adenoma in the differential diagnosis of neck masses located in atypical regions.

Keywords

Head and neck neoplasms , histology , pleomorphic adenoma , pleomorphic salivary gland neoplasm

Posterior Servikal Üçgende Tespit Edilen Atipik Yerleşimli Pleomorfik Adenom: Olgu Sunumu

Abstract

Pleomorfik adenom, tükürük bezlerinin en sık rastlanan benign tümörüdür ve çoğunlukla parotis, submandibular ve minör tükürük bezlerinde görülür. Ancak heterotopik tükürük bezi dokusundan kaynaklanan ve boyun gibi atipik bölgelerde gelişen olgular oldukça nadirdir. Bu olgu sunumunda, boyun sağ posterior servikal üçgende yerleşimli pleomorfik adenom tanısı konulan 62 yaşında kadın hasta sunulmuştur. Klinik değerlendirme, radyolojik görüntüleme ve ince iğne aspirasyon biyopsisi ile benign bir oluşum olduğu desteklenmiş ve kitle cerrahi olarak eksize edilmiştir. Histopatolojik inceleme sonucu benign mikst tümör (pleomorfik adenom) olarak raporlanmıştır. İki yıllık takip sürecinde nüks izlenmemiştir. Bu olgu, atipik lokalizasyonlarda ortaya çıkan boyun kitlelerinin değerlendirilmesinde pleomorfik adenomun ayırıcı tanıda dikkate alınması gerektiğini göstermektedir.

Keywords

Baş ve boyun neoplazileri , Histoloji , Pleomorfik adenom , Tükürük bezi neoplazileri

References

• 1. Hallak B, Kamel ME, Bouayed S, Yerly S. Atypical localisation of pleomorphic adenoma issue from heterotopic salivary tissue in the supraclavicular region: diagnosis and management. BMJ Case Rep. 2020;13(11): e237583.
• 2. Pesavento G, Ferlito A. Benign mixed tumour of heterotopic salivary gland tissue in upper neck. Report of a case with a review of the literature on heterotopic salivary gland tissue. J Laryngol Otol. 1976;90(6):577-584.
• 3. Rodgers GK, Felder H, Yunis EJ. Pleomorphic adenoma of cervical heterotopic salivary gland tissue: case report and review of neoplasms arising in cervical heterotopic salivary gland tissue. Otolaryngol Head Neck Surg. 1991;104(4):533-536.
• 4. Guzzo M, Locati LD, Prott FJ, Gatta G, McGurk M, Licitra L. Major and minor salivary gland tumors. Crit Rev Oncol Hematol. 2010;74(2):134-148.
• 5. Li Y, Xiao N, Dai Y, Guo S, Zhang Y, Wang D, et al. Comprehensive characterization of pleomorphic adenoma at intraoral unusual sites. Oral Surg Oral Med Oral Pathol Oral Radiol. 2022;133(1):21-27.
• 6. Dongol K, Karki UR. Pleomorphic adenoma in the external auditory canal: Arising at an atypical location. SAGE Open Med Case Rep. 2021;9:2050313X211063790.
• 7. İsmı O, Vayısoğlu Y, Arpaci RB, Eti C, Pütürgeli T, Gorur K, et al. Carcinoma ex pleomorphic adenoma originating from ectopic salivary gland in the neck region: case report. Gland Surg. 2015;4(6):567-571.
• 8. Willis RA. Some unusual developmental heterotopias. Br Med J. 1968;3(5613):267-272.
• 9. Lukšić I, Suton P, Manojlović S, Macan D, Dediol E. Pleomorphic adenoma in ectopic salivary gland tissue in the neck. Coll Antropol. 2012;36(Suppl 2):133-136.
• 10. Teh J, Dessauvagie B, Kessell M, Dissanayake D, Wylie EJ. An atypically located pleomorphic adenoma: Radiological and pathological correlation. J Med Imaging Radiat Oncol. 2022;66(1):105-106.
• 11. Pérez-De-Oliveira ME, Leite AA, de Lima Morais TM, Lopes MA, de Almeida OP, Vargas PA. Intraoral pleomorphic adenoma with extensive bone formation. Int J Surg Pathol. 2020;28(4):410-411.
• 12. Knight J, Ratnasingham K. Metastasising pleomorphic adenoma: Systematic review. Int J Surg. 2015;19:137-145.
• 13. La Macchia R, Stefanelli S, Lenoir V, Dulguerov N, Pache JC, Becker M. Pleomorphic Adenoma Originating from Heterotopic Salivary Tissue of the Upper Neck: A Diagnostic Pitfall. Case Rep Otolaryngol. 2017;2017:5767396.
• 14. Basharat R, Bjorling A, Samara G. Pleomorphic adenoma of the nasal cavity. Cureus. 2024;16(8):e65969.