RARE COMPLICATION OF COVID -19 DISEASE TINU SYNDROME IN A 11-YEAR-OLD BOY, FEATURES AND MANAGMENT.

Tubulointerstitial nephritis and uveitis syndrome (TINU) is a rare disease defined by a combination of different abnormalities, tubulointerstitial nephritis and uveitis. We describe an 11-year-old boy who got sick with the Covid-19 disease with positive outcome and after 2 weeks developed a complication - tubulointerstitial nephritis with pain in the abdominal cavity, loss of appetite, weakness and low-grade fever with further subsequent attachment of anterior uveitis. Laboratory indicators corresponded to renal insufficiency of tubular origin. Ophthalmological examination conducted against the background of redness of both eyes, photophobia, pain in the eyeball area and decreased vision confirmed bilateral uveitis. Analysis showed high levels of La/SS-B, anti-SARS-CoV-2 IgG with confirmed the suspicion of post-covid TINU syndrome. This case showed a good response to steroid therapy with long-term remission of nephritis and less clinical efficacy in the treatment of uveitis. Special attention should be paid to the occurrence of such a rare syndrome at an early stage after recovery from the Covid-19 disease.