Spontaneous liver haemorrhage and haemobilia as initial presentation of undiagnosed polyarteritis nodosa.

Polyarteritis nodosa (PAN) is a systemic necrotising vasculitis that could result in multifocal aneurysms of visceral arteries. Isolated multiple aneurysms of the hepatic arteries in the setting of PAN is extremely rare. Patients are typically asymptomatic and, very rarely, spontaneous rupture with life threatening haemorrhage could be the initial presentation of an undiagnosed PAN. Accurate diagnosis, effective haemostasis and prompt initiation of immunosuppressive treatment with the help of a multidisciplinary team will improve the clinical outcomes.