Spontaneous psoas muscle haematoma due to antiplatelet treatment for stroke

Spontaneous psoas muscle haematoma is a rare complication associated with bleeding diatheses such as anticoagulation, inherited coagulopathies and haemodialysis. An 80-year-old woman was admitted with a sudden onset of left sided weakness when she woke up from sleep. Magnetic resonance imaging of the brain revealed an infarct in the right occipital and left posterior parietal regions. She was started on aspirin 150 mg daily. She developed extensive purplish discolouration over the left lumbar region 5 days later. Contrast enhanced computed tomography of the abdomen showed left psoas muscle haematoma. The haematoma was managed conservatively and aspirin was discontinued. This case study describes this case, who developed spontaneous psoas haematoma (PH) after starting aspirin for stroke, which was managed conservatively. Only a few cases of spontaneous PH secondary to aspirin were previously reported.