Arguments are presented to show that the sebaceous cyst is nonexistent. It is a variety of keratinous cyst. The cysts usually given this name are lined not by sebaceous but by keratinizing cells resembling those of the buccal mucosa. Hardened cell membranes are not formed. The fragile cells therefore break, liberating the horny contents.
KLIGMAN AM. The Myth of the Sebaceous Cyst. Arch Dermatol. 1964;89(2):253–256. doi:10.1001/archderm.1964.01590260091018
Monkeypox Resource Center
Customize your JAMA Network experience by selecting one or more topics from the list below.