- palpable purpura without thrombocytopenia and coagulopathy
- arthralgia
- abdominal pain
- renal disease
In patients with an incomplete or unusual presentation, biopsy of the affected organ (ie skin, kidney) demonstrating predominantly IgA deposition supports the diagnosis.
Source
Dedeoglu, F. MD et al. "Clinical manifestations and diagnosis of HSP." Up to Date. May 2008. <http://www.uptodate.com>