Multiple atheromatous cysts (wens). (Lexer.)
2. Sebaceous Adenomas.
—These arise from the sebaceous glands, which are lobulated, like those about the nose and ear. Adenomas from this source are extremely liable to ulceration, may undergo calcification, and are often mistaken for epithelioma because of the fungous ulcerations to which they give rise.
3. Adenocarcinoma.
—Sutton has also described an adenocarcinoma of the peculiar sebaceous glands named after Tyson. These are found particularly at the base of the prepuce, this form of tumor being rare. Adenomas arising from the mucous glands, which are usually transformed into cysts, are also known, as well as other gland tumors springing from the glands of Bartholin, Cowper, etc. (See [Plate XXIII, Fig. 2], and [Plate XXIV].)
Pituitary adenomas are either analogous to struma or belong to the mixed tumors of dermoid or teratomatous type.
Prostatic adenoma is in large degree fibromyoma of that body, with more or less hypertrophy of its glandular structures. Minute cystic alterations may occur also, as well as growth resembling intracanalicular fibro-adenoma.
Adenoma is occasionally observed in the salivary glands, where it is usually encapsulated, and may undergo cystic changes. It has been observed in the liver and pancreas. In the former its pseudo-ducts often contain inspissated material of bile-green tint.
The lesions of the kidney referred to as cystadenoma are now grouped among the teratomas, and are described under that heading. They present interesting examples of mixed tumors.
In the testis, as in the ovary, epithelial tumors frequently present themselves, but they partake less often of the type of pure adenoma, and incline rather to that already described under Ovarian Cystoma. Even in the paradidymis tumors of this same character are found, with cystic or even papillary alterations.