What is the anatomical seat of milium?
The sebaceous gland (probably one or several of the superficially-situated acini), the duct of which is in some manner obliterated, the sebaceous matter collects, becomes inspissated and calcareous, forming the pin-head lesion. The epidermis is the external covering.
What is the treatment?
The usual plan is to prick or incise each lesion and press out the contents. In some milia it may be necessary also, in order to prevent a return, to touch the base of the excavation with tincture of iodine or with silver nitrate. Electrolysis is also effectual. In those cases where the lesions are numerous the production of exfoliation of the epiderm by means of resorcin applications (see acne) is a good plan.
Steatoma.
(Synonyms: Sebaceous Cyst; Sebaceous Tumor; Wen.)
Describe steatoma.
Steatoma, or sebaceous cyst, appears as a variously-sized, elevated, rounded or semi-globular, soft or firm tumor, freely movable and painless, and having its seat in the corium or subcutaneous tissue. The overlying skin is normal in color, or it may be whitish or pale from distention; in some a gland-duct orifice may be seen, but, as a rule, this is absent.
What are the favorite regions for the development of steatoma?
The scalp, face and back. One or several may be present.