Abstract     Psoriatic arthropathy [PsA] is one of the common seronegative spondyloarthropathies. It was in the mid-19^th century that an association between psoriasis and joint involvement first made when, apart from the clinical findings, diagnosis of PsA was based mainly on conventional radiography. In the recent times, imaging techniques like magnetic resonance imaging [MRI] and ultrasonography [USG] have been increasingly used in the diagnosis and management of PsA. . The interpretations provide additional clues to the pathogenesis of this progressive and sometimes mutilating disease. A positive radiological finding using X ray means an advanced disease, and hence the need for better imaging studies which can detect the pathology much earlier. As is well agreed upon, early detection of articular and peri-articular inflammation will help timely initiation of appropriate therapy to prevent further progression of the inflammation and thereby prevent joint destruction. USG ismore effective than X ray and less expensive than and having more or less equal diagnostic potential as MRI. USG is areliable investigatory tool freely available in many canters and should be made use of in the diagnosis and follow up of patients with PsA

Keywords: Psoriatic arthritis; Ultrasound

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