Abstract : Psoriatic arthritis (PsA) provides some context. The clinical manifestations and disease course of PsA might vary greatly from one region of the world to another. The oligoarticular type, which was formerly believed to be the most common, has been replaced by the polyarticular type. The purpose of this research is to gain a better understanding of the clinical patterns associated with psoriatic arthritis in Mosul. Within the confines of a local hospital, fifty patients diagnosed with PsA took part in a case series investigation that lasted for a period of half a year. For the purpose of determining the level of severity of the skin condition, the Psoriatic Area and Severity Index (PASI) was utilized. PsA was diagnosed by applying the CASPAR criteria for the condition. The classification criteria developed by Moll and Wright were utilized in order to categorize the number and pattern of swollen and painful joints. Plaque-type psoriasis was the clinical form of psoriasis that was observed in the greatest number of people overall. In most cases, symptoms of psoriatic arthritis did not appear until the patient was 40.4 years old. The symmetrical polyarthritis was the clinical symptom that was seen in the most patients (35, or 70 percent), making it the most prevalent clinical manifestation. The clinical presentation of psoriatic arthritis varies greatly from one part of the world to another. The symmetrical form of polyarthritis is the most common type of the condition.