[Conditions mimicking polymyalgia rheumatica].

Objective: To examine the main clinical and laboratory data of patients initially diagnosed with polymyalgia rheumatica (PMR), which then developed another conditions.

Material And Methods: We reviewed the clinical records of patients diagnosed with PMR in three hospitals in Argentina. Patients had a diagnosis of PMR if they met the following criteria: age ≥ 50 years, erythrocyte sedimentation rate (ESR) at the time of diagnosis > 40 mm, persistent pain and stiffness of at least one month of evolution in two of the following areas: neck, shoulders or proximal arms, hips or proximal lower limbs.