This woman had this painless lesion for the past nine months.

a. What is the most likely diagnosis?

Cyst of Moll (also known as suderiferous cyst or apocrine hidrocystoma)

b. What is the origin of this lesion?

The lesion arises from the sweat gland of the cilia (glands of Moll)

c. How can it be treated?

The lesion can be:

• aspirated with a fine needle but recurrence is common
• excision with removal of the sac to avoid recurrence