Relevant laboratory tests and therapeutic monitoring in psoriasis

Although psoriasis does not require any diagnostic laboratory tests, physicians need to keep in mind the variety of laboratory studies for both screening as well as ongoing monitoring of psoriasis therapies. A multitude of laboratory tests exists to examine the safety of these therapies, including topical therapies, phototherapy, oral medications, and/or biologic agents. Knowledge of the available tests is important to screen vulnerable selected populations prior to initiating psoriasis treatment, such as pregnant women, immunocompromised patients, or patients with certain medical conditions. Screening labs are important in identifying these patients. Most importantly, familiarity with the available laboratory studies will ensure timely management of any anticipated side effects of the various psoriasis therapies.