Abstract:
A middle aged man with prolonged pyrexia was referred to us with a diagnosis of FUO
(Fever of unknown origin). He was evaluated by various investigations and a diagnosis
of Tuberculosis was established. On anti tubercular treatment (ATT) he developed complication
of acute renal injury –non oliguric renal failure, from which he recovered fully after
the puzzle was successfully solved & managed accordingly. Even though he was proved
to have rifampicin induced acute intersticial nephritis(AIN) by biopsy , he had varied
& unconventional presentation like without oliguria, without peripheral blood eosinophilia,
and more so particularly on the maiden administration of rifampicin. Thus our case
highlights the importance of quickly establishing the cause for FUO, and also need
for greater vigilance on part of physicians to solve unconventional presentations
of complications arising out of treatment.
Keywords:
FUO - Fever of unknown origin - Tuberculosis - Rifampicin - Acute renal insult - acute
intersticial nephritis
