Biologic drug survival in Israeli psoriasis patients.

Background: Drug survival is defined as the time period of treatment with a certain drug until its cessation. The role of previous exposure to traditional systemic treatments in biologic survival is still unknown.

Objective: To investigate the drug survival rates of biologic treatments in patients with psoriasis and to identify predictor factors.

[Cutaneous polyarteritis nodosa--is it really benign?].

Polyarteritis nodosa (PAN) is a multi-system disease, characterized by necrotizing vasculitis of medium-sized arteries that may affect any organ system. Cutaneous PAN is the cutaneous limited form of PAN. It affects 10% of all cases of PAN and usually demonstrates a benign and chronic course.