A JAMA Dermatology study suggests that people with psoriasis might run a higher risk of developing cancer.
Biologic medications, introduced in the latter part of the 20th century, became the new norm for psoriasis research and treatments. These agents stem from substances found in living cells and act on the body's immune system. They treat psoriasis by targeting overactive immune cells, which cause the disease.
The first individual treatments for psoriasis were introduced, replacing mass treatments that relied on trial and error.
The word "lepra" was removed from the definition of psoriasis, separating it from the disease of leprosy.
Dr. Robert Willan of England identified psoriasis as its own separate entity.
