Characterization of Lipoprotein Composition and Function in Pediatric Psoriasis Before and After Treatment

Inclusion Criteria: * Children ages 6-17 years of all races/ethnicities with plaque and/or extensive guttate psoriasis for at least 6 months and on topical or systemic therapy * Patients in the systemic group can be starting a medication for the first time OR transitioning from another systemic if unresponsive and on that previous treatment for ≤ 3 months. * Patients may concurrently have psoriatic arthritis if initiation of a systemic medication is warranted by skin severity. * Children ages 6-17 years of all races/ethnicities with acne being treated with isotretinoin * Children ages 6-17 years of all races/ethnicities without plaque or guttate psoriasis and history of severe acne or treatment with isotretinoin as controls. Exclusion Criteria: * Patients less than 6 years of age or 18 years and older * Patients with congenital heart disease, prior cardiac catheterizations/surgeries, or on cardiac medications in the past two years other than for hypertension (eg, calcium channel-blockers, beta-blockers and vasotropic medications). * Patients who have other systemic inflammatory diseases (including atopic dermatitis, severe acne, inflammatory bowel disease, juvenile idiopathic arthritis, connective tissue diseases and/or other autoimmune diseases). * Patients who have active infection or malignancy or have suffered from infection requiring oral or parenteral antibiotic in past 2 weeks. * Patients and parents/caregivers unable to give written informed consent.