external male genitalia atrophy MP:0009201 MPheno.ontology acquired diminution of the size of the external masculine genital organs, 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 external male genitals external male genital atrophy external male organa genitalia atrophy external masculine genital organ atrophy organa genitalia masculina externa atrophy small external male genitalia