abnormal sebaceous gland morphology sebaceous gland atrophy MP:0000649 MP:0001228 MPheno.ontology acquired diminution of the size of the holocrine glands of the dermis that secrete sebum into the hair follicles, associated with wasting as from death and reabsorbtion of cells, diminished cellular proliferation, decreased cellular volume, pressure, ischemia, malnutrition, reduced function or malfunction, or hormonal changes atrophic sebaceous gland