Benign, keratin-filled cysts found under the epidermis that resemble small sesame seeds are:

Milia are small, benign cysts filled with keratin that form just beneath the epidermis, often resulting in tiny, white bumps on the skin. They can appear in various locations on the face and are particularly common around the eyes and cheeks. Their distinctive appearance, resembling small sesame seeds, is characteristic of milia, making them easily identifiable.

In contrast, cysts generally refer to larger, more fluid-filled sacs that can be found in various parts of the body and are not limited to the skin; they can also be inflamed or infected. Comedos refer specifically to clogged hair follicles—often manifesting as blackheads or whiteheads—associated with acne but lacking the keratin content characteristic of milia. Pustules are inflamed lesions that contain pus, typically associated with infections or acne, rather than being keratin-filled like milia.

Understanding the specific characteristics of milia is crucial for differentiating them from other skin conditions, as they require different approaches for treatment and management.