Case history
Case history
A 5-year-old boy presents with a 4-day history of a purpuric rash on his lower extremities, mild abdominal cramping, and diffuse ankle pain. His mother reports that he recently had symptoms of an upper respiratory tract infection.
Other presentations
While the rash occurs in all patients, and is the first presenting symptom in 95% of patients, the other classic symptoms do not always manifest.[6] Arthralgia or joint swelling is seen in 80% of cases, abdominal pain in around 50%, and renal inflammation in up to 50%.[6][7][8] Scrotal pain and swelling may occur in about 13% of boys.[9]
Very rarely, other organ systems may be involved, including the central nervous system (patients may present with headaches or seizures) and pulmonary system (patients may present with life-threatening pulmonary haemorrhage).[10]
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