Large numbers of lobules coalescing into a definitely elevated mass may be called benign sebaceous hyperplasia, and occasional small keratin-filled pseudocysts may be seen and must be differentiated from epidermoid cyst or dermoid cyst with sebaceous adnexa. The pathologist must be careful to differentiate such lesions from salivary neoplasms with sebaceous cells, such as sebaceous lymphadenoma and sebaceous carcinoma. Oral<unk>  granules are usually not biopsied because they are readily diagnosed clinically, but they are often seen as incidental findings of mucosal biopsies of the buccal, labial and retromolar mucosa. The granules are similar to normal sebaceous glands of the skin but lack hair follicles and almost always lack a ductal communication with the surface. The glands are located just beneath the overlying epithelium and often produce a local elevation of the epithelium. Individual sebaceous cells are large, with central dark nuclei and abundant foamy cytoplasm. Classification Sebaceous glands are normal structures of the skin but may also be found ectopically in the mouth, where they are referred to as oral<unk>  granules or ectopic sebaceous glands. On the foreskin they are called Tyson's glands, not to be confused with hirsuties coronae glandis. When they appear on the penis, they are also called penile sebaceous glands.
Fordyce spots
Forchheimer spots
Elschnig spots
Bier spots
Koplik's spots
Fuchs spot
Bitot's spots
Brushfield spots