Sebaceous carcinoma is a rare but lethal tumor of the skin that originates in the gland. Quiz. 1. Sebaceous glands belong to which of the following glandular groups? A. mesocrine B. endocrine C. exocrine D. paracrine. Answer to Question #1. C is correct. Sebaceous glands are exocrine glands, since they utilize ducts to secrete sebum. The …