1. Eisen D. Disorders of pigmentation in the oral cavity. Clin Dermatol 2000; 18(5): 579-87.
2. Tarakji B, Umair A, Prasad D, Altamimi MA. Diagnosis of oral pigmentations and malignant transformations. Singapore Dent J 2014; 35C: 39-46.
3. Adel Kauzman B, Pavone M, Blanas N, Bradley G. Pigmented lesions of the oral cavity: review, differential diagnosis, and case presentations. J Can Dent Assoc 2004; 70(10): 682-3.
4. Müller S. Melanin‐associated pigmented lesions of the oral mucosa: presentation, differential diagnosis, and treatment. Dermatol Ther 2010; 23(3):220-9.
5. Yamada M, Iijima Y, Seo M, Hino S, Sano M, Sakagami H, et al. Cancer chemotherapy-associated pigmentation of the oral mucosa. In Vivo 2023; 37(4): 1880-5.
6. Buchner A, Hansen LS. Amalgam pigmentation (amalgam tattoo) of the oral mucosa: a clinicopathologic study of 268 cases. Oral Surg Oral Med Oral Pathol 1980; 49(2): 139-47.
7. Sun S, Huang X, Gao L, Zhang Y, Luo J, Zhang S, et al. Long-term treatment outcomes and prognosis of mucosal melanoma of the head and neck: 161 cases from a single institution. Oral Oncol 2017; 74: 115-22.
8. Gondak RO, da Silva-Jorge R, Jorge J, Lopes MA, Vargas PA. Oral pigmented lesions: Clinicopathologic features and review of the literature. Med Oral Patol Oral Cir Bucal 2012; 17(6): e919-24.
9. Feller L, Masilana A, Khammissa RA, Altini M, Jadwat Y, Lemmer J. Melanin: the biophysiology of oral melanocytes and physiological oral pigmentation. Head Face Med 2014; 10: 8.
10. Masilana A, Khammissa RA, Lemmer J, Feller L. Physiological oral melanin pigmentation in a South African sample: A clinical study. J Investig Clin Dent 2017; 8(4): e12258.
11. Stoopler ET, Alawi F. Pigmented lesions of the oral mucosa. Contemporary oral medicine: Springer; 2019. p. 1175-205.
12. Tosios KI, Kalogirou E-M, Sklavounou A. Drug-associated hyperpigmentation of the oral mucosa: report of four cases. Oral Surg Oral Med Oral Pathol Oral Radiol 2018; 125(3): e54-e66.
13. Ferreira L, Jham B, Assi R, Readinger A, Kessler HP. Oral melanocytic nevi: a clinicopathologic study of 100 cases. Oral Surg Oral Med Oral Pathol Oral Radiol 2015; 120(3): 358-67.
14. Kahn MA, Weathers DR, Hoffman JG. Transformation of a benign oral pigmentation to primary oral melanoma. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2005; 100(4): 454-9.
15. Ison J, Clark A. Pigmented lesions of the oral cavity. Oral Maxillofac Surg Clin North Am 2023; 35(2): 153-8.
16. Barakian Y, Nekooei Samani M, MohammadbeigiA. Assessment of the Prevalence and Related Factors of Oral Mucosal Pigmentation in Patients Referring to Dental School and Salamat Clinic of Qom [in Persian]. Qom Univ Med Sci J 2021; 14(11): 30-7.
17. Mirzaei Z, Khashabi E, Sarrafan N. Evaluation of the prevalence of oral pigmentation in patients referred to Urmia dental faculty in 2017 [in Persian]. Stud Med Sci 2018; 29(8): 614-20.
18. Hassona Y, Sawair F, Al‐karadsheh O, Scully C. Prevalence and clinical features of pigmented oral lesions. Int J Dermatol 2016; 55(9): 1005-13.
19. da Silva Albuquerque DM, Cunha JLS, Roza ALOC, Arboleda LPA, Santos-Silva AR, Lopes MA, et al. Oral pigmented lesions: a retrospective analysis from Brazil. Med Oral Patol Oral Cir Bucal 2020; 26(3): e284-e291.
20. Babaei N, Nooribayat S. Frequency of oral pigmentation in patients referred to Babol Dental School (2008-2009) [in Persian]. J Qazvin Univ Med Sci 2011; 15(3): 87-90.
21. Hussain TA, Garib BT. Prevalence of Oral Pigmented Lesions in Dental Outpatient Attending Piramerd Dental Health Center in Sulaimani. Advanced Medical Journal 2025; 10(1): 108-16.
22. Rabiei M, Nasrin R. Frequency of oral mucosal pigmentation among patients referred to the Faculty of Dentistry, Guilan University of Medical Sciences. J Iran Dent Assoc 2005; 17(3): 95-100.
23. Alhowshabi AaM, ALHajj WAN, Al-Hajri MM, Al-Akwa’a OM, Halboub E, Al-Maweri SA. Prevalence and associated factors of oral pigmented lesions among Yemeni dental patients: a large cross-sectional study. BMC Oral Health 2025; 25(1): 391.
24. Salehi MR, Saberi Z, Karimi F, Abbasi F. Evaluation of Frequency Distribution of Oral Diffuse Pigmentation in Patients Presenting to Oral Diseases Department of Isfahan Dental School in Second Three-Month Period of 2019 [in Persian]. Iranian J Epidemiol 2021; 17(4): 372-9.
25. De Giorgi V, Sestini S, Bruscino N, Janowska A, Grazzini M, Rossari S, Lotti T. Prevalence and distribution of solitary oral pigmented lesions: a prospective study. J Eur Acad Dermatol Venereol 2009; 23(11): 1320-3.
26. Ali M, Joseph B, Sundaram D. Prevalence of oral mucosal lesions in patients of the Kuwait University Dental Center. Saudi Dent J 2013; 25(3): 111-8.