The role of vitamin D in psoriasis: a review.

BACKGROUND AND OBJECTIVE: Psoriasis is a common, chronic autoimmune inflammatory skin disorder, which has potential systemic complications and is clinically defined by sharply demarcated, erythematous patches and plaques covered by a characteristic silvery white scale. Topical corticosteroids have widely been regarded as the mainstay first line of treatment. Recently, topical vitamin D analogs have been added to the first-line treatment repertoire as well, either as monotherapy or in combination with topical steroids due to synergistic, complementary effectiveness. In this paper, we review the role of vitamin D in the pathophysiology and treatment of psoriasis. METHODS: A comprehensive search of the Cochrane Library, MEDLINE, and PUBMED databases were performed to identify relevant basic science and clinical trial literature investigating the role of vitamin D in psoriasis. Primary endpoints in clinical trials were largely based on clinical improvement as assessed by the psoriasis area severity index score or physician's global assessment. RESULTS AND CONCLUSION: The role of vitamin D in psoriasis is complex and extensive. Oral and topical vitamin D therapies provide comparable efficacies to corticosteroids when used as monotherapy and may be superior when used in combination with a potent topical steroid. Additionally topical vitamin D analogs demonstrate a favorable safety profile with "steroid-sparing" effects. Thus, topical vitamin D derivatives should be considered an indispensable component of the current physician's arsenal in the treatment of psoriasis.

Prevalence and severity of pruritus and quality of life in patients with cutaneous T-cell lymphoma.

CONTEXT: Cutaneous T-cell lymphoma (CTCL), although rare, is associated with a significant symptom burden. Pruritus appears to be one of the most prominent and disturbing symptoms. OBJECTIVES: To describe the prevalence and severity of pruritus and quality of life (QOL) in patients with CTCL. METHODS: Patients with CTCL able to complete two questionnaires were invited to complete a visual analogue scale for itch (VAS(itch)) and the Skindex-29. Prevalence of pruritus, mean score, and SD were estimated for the VAS(itch) and Skindex-29, and the Pearson's correlation coefficient was calculated to evaluate the relationship between severity of pruritus and QOL. RESULTS: One hundred patients were recruited (mean [SD] age 57.9 [12.9] years, range 30-86 years). Eighty-eight percent reported pruritus in the preceding four weeks, 46% indicating that it was often or always a problem. The mean (SD) of VAS(itch) (n=92) was 3.2 (3.2), range zero to 10. The mean (SD) total Skindex-29 score was 43.3 (27.7). More advanced disease stage was associated with poorer QOL. The Skindex-29 correlated strongly with the VAS(itch) (Pearson's correlation coefficient=0.72, P<0.001). CONCLUSION: All aspects of QOL are affected in CTCL. Pruritus is a common and troublesome symptom. A more advanced disease stage and more severe pruritus symptoms were associated with poorer QOL in this study.