Final answer:
Pernicious anemia is caused by poor absorption of vitamin B12 and is often seen in patients with Crohn's disease, surgical removal of the intestines or stomach, intestinal parasites, and AIDS. Treatment involves vitamin B12 supplementation through injections or nasal sprays.
Step-by-step explanation:
Pernicious anemia is caused by poor absorption of vitamin B12 and is often seen in patients with Crohn's disease, surgical removal of the intestines or stomach, intestinal parasites, and AIDS.
It is a condition that affects the production of red blood cells and can lead to fatigue, weakness, and other symptoms.
Treatment involves vitamin B12 supplementation through injections or nasal sprays.