Background: Great quantity of star fruit (Averrhoa carambola) ingestion, or even smaller amounts in a patient with an empty stomach, may induce acute kidney injury (AKI).
Case Presentation: We report a 65-year-old male patient with underlying multiple myeloma and normal kidney function, who developed alterations of consciousness and rapid increase in serum creatinine due to oxalate nephropathy after large ingestion of star fruit on an empty stomach. Kidney biopsy revealed the diagnosis of oxalate nephropathy.
Star fruit (carambola) is cultivated in many tropical and subtropical areas, especially in Southeast Asia and South and Central America. Star fruit nephrotoxicity in people with normal renal function is rarely reported. However, this case reported of acute oxalate nephropathy induced by large ingestion of star fruit. Along with those previously reported, confirm the existence of this disease, and is a reason to alert health professionals in these regions.