Habitual khat chewing and oral melanoacanthoma: A case report  

作　　者：Hamad Albagieh Ashwag Aloyouny Rana Alshagroud Abdulaziz Alwakeel Shahad Alkait Fatimah Almufarji Ghadeer Almutairi Rana Alkhalaf 

机构地区：[1]Oral Medicine and Diagnostic Science Department,College of Dentistry,King Saud University,Riyadh 12372,Saudi Arabia [2]Basic Dental Science,College of Dentistry,Princess Nourah Bint Abdulrahman University,Riyadh 11671,Saudi Arabia [3]Oral Medicine,Ministry of Health,Tabuk 00000,Saudi Arabia [4]Postgraduate,College of Dentistry,Princess Nourah Bint Abdulrahman University,Riyadh 11671,Saudi Arabia

出　　处：《World Journal of Clinical Cases》2023年第2期449-455,共7页世界临床病例杂志

摘　　要：BACKGROUND Habitual khat(Catha edulis) chewing has been proven to cause numerous oral tissue changes. However, oral melanoacanthoma triggered by chronic khat chewing is rare. Oral melanoacanthoma is an uncommon, sudden, asymptomatic, benign pigmentation of the oral cavity. Under the microscope, the epithelial layer of the oral mucosa showed dendritic melanocyte proliferation and acanthosis. The study aimed to highlight chronic khat chewing as a trigger for oral melanoacanthoma.CASE SUMMARY In the current study, we report a case of a 26-year-old male patient with a rare presentation of oral melanoacanthoma triggered by regular khat chewing. Many intrinsic and extrinsic factors can cause oral pigmentation. Chewing khat is an extrinsic factor that can cause several diseases, including oral pigmentation. In this case, the definitive diagnosis was oral melanoacanthoma. This diagnosis was made based on the patient’s history, clinical lesion presentation, and microscopic biopsy results.CONCLUSION Habitual khat(Catha edulis) chewing causes many oral tissue changes including oral melanoacanthoma. The study aimed to highlight chronic khat chewing as a trigger for oral melanoacanthoma.

关 键 词：Oral melanoacanthoma Oral lesion Qaat chewing Oral pigmentation Brown pigmentation Benign lesion Case report 

分 类 号：R73[医药卫生—肿瘤]