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Elderly individuals comprise the faster growing patient population group and acute renal failure (ARF) is quite common among them, although exact numbers are not known. We reviewed the literature with regards to the characteristics of ARF in elderly patients and describe some useful guidelines. The ageing kidney is characterized by many structural and functional changes, which are mainly due to various chronic disorders, such as hypertension, diabetes and atherosclerosis, which are highly prevalent in these patients. A number of structural and functional changes characteristic of the ageing kidney make elderly people especially prone to renal damage. ARF in the elderly is frequently of multifactorial origin and often with an atypical presentation, like the "intermediate syndrome", which combines characteristics of pre-renal azotemia and acute tubular necrosis. Physical examination and laboratory blood and urine indices may sometimes be misleading occasionally leading to misdiagnosis. Prophylaxis remains the preferred approach to therapy: one should avoid nephrotoxic drugs and poly-pharmacy, adjust drug doses and achieve adequate hydration of the patient as cautiously as possible. Dialysis therapies can be used for treatment of ARF irrespective of age and carry a good prognosis.

Tubulointerstitial nephritis and uveitis (TINU) syndrome is a rare entity first described in 1975, affecting mainly young women and adolescents. We present a case of a 52-year-old female patient (one of the oldest in the literature) who complained of fever, anorexia, nausea, and vomiting. After she was admitted to our hospital, laboratory tests revealed tubular proteinuria, elevated erythrocyte sedimentation rate (ESR), anemia, and renal insufficiency (serum creatinine 4.2 mg/dL) with metabolic acidosis. Ophthalmologic examination revealed anterior uveitis (iritis) and renal biopsy showed acute tubulointerstitial nephritis. The diagnosis of TINU syndrome was established and the patient was treated with oral corticosteroids. All symptoms and ophthalmologic abnormalities disappeared after 6 weeks of treatment. Renal function also recovered completely and remained stable at follow-up. TINU syndrome should be considered in the differential diagnosis of unexplained tubulointerstitial nephritis, especially in the presence of ocular findings. Corticosteroid therapy is still controversial, but it helps in the quick resolution of renal and mainly eye abnormalities.

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