The exact mechanism of this disease is not known, but it is known that autoantibodies attack aminoacyl-tRNA synthetases. The autoantibodies can form due to heredity or a viral infection.
Typical Age of onset
43 - 60
Easy or excessive bruising (purpura)
Rash - pinpoint-sized reddish-purple spots (petechiae) usually on the lower legs
Bleeding from the gums or noseBlood in urine or stools
Unusually heavy menstrual flow
Sources: Mayo Clinic, Healthline