This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Dental
Fordyce disease most commonly involves 
Select and explain. 
A. Lips, B. Neck, C. Buccal mucosa, D. Trunk
A: Lips
Answer: A: Lips 
Explanation: Fordyce spots most commonly involve the lips They are nothing but heterotopic sebaceous glands i.e. not associated with hair follicles They are asymptomatic but visible. Sebaceous Glands: Sebaceous Glands are lipid- producing glads that arise from hair follicle at the junction of infundibulum and isthmus. They are associated with hair follicle and termed as Pilosebaceous unit. The glands may also found in ceain non hairy sites such as Eyelids- Meibomian glands Nipples-Montgomerys glands Genitals-Tysons gland Lips-Fordyce spots Ref Harrison 20th edition pg 1256