sebaceous hyperplasia
Pronunciation: se-BAY-shus hy-per-PLAY-zhah
Benign enlargement of sebaceous glands appearing as small, yellowish papules, commonly seen on the nose of newborns.
Full Definition
Sebaceous hyperplasia is a benign condition characterized by enlarged sebaceous glands that appear as small, yellowish, dome-shaped papules. In newborns, this condition is common and results from maternal hormone stimulation in utero. The lesions typically appear on the nose, cheeks, and upper lip within the first few weeks of life and resolve spontaneously as maternal hormones clear from the infant's system. Unlike milia, sebaceous hyperplasia papules are not filled with keratin but represent enlarged oil glands. No treatment is required, and parents should be reassured of the benign, self-limiting nature.
Usage
Usage note: Distinguish from milia by noting the sebaceous gland involvement rather than keratin content.
In Context
- "Multiple small yellowish papules on the nasal alae consistent with sebaceous hyperplasia." — Newborn skin examination
- "Sebaceous hyperplasia noted to be resolving at 6-week follow-up visit." — Pediatric follow-up note