Conclusion
Distinguishing between late-onset TINU syndrome and drug-induced AIN
remains difficult given that patients with TINU syndrome may develop
uveitis long after the onset of AIN. Therefore, ophthalmic examination
is required not only upon diagnosis but also continuously or when eye
symptoms (e.g., photophobia and conjunctival suffusion), elevation of
urinary β2MG, and relapse of urinary findings (e.g., hematuria and
proteinuria) are observed.