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.