28 February 2015 : Case report
A Report of an Adult Case of Tubulointerstitial Nephritis and Uveitis (TINU) Syndrome, with a Review of 102 Japanese Cases
Unknown etiology, Challenging differential diagnosis, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)Keiichiro MatsumotoABCEF, Kenichi FukunariABCF, Yuji IkedaABF, Motoaki MiyazonoBCF, Tomoya KishiAB, Ryoko MatsumotoCF, Makoto FukudaBC, Saori UchiumiAB, Mai YoshizakiBC, Yasunori NonakaAC, Akiko KanayaABC
Am J Case Rep 2015; 16:119-123
BACKGROUND: Although TINU syndrome is characterized by idiopathic TIN with bilateral anterior uveitis, few reports have provided a comprehensive summary of the features of this disorder. Previous reports have suggested that many Japanese patients had HLA-A2 and -A24 (7), but there is no evidence.
CASE REPORT: A 44-year-old female was referred to our hospital due to renal dysfunction in March 2012. After admission, her symptoms improved spontaneously without medication within 2 weeks. In the outpatient clinic, she was diagnosed with idiopathic bilateral anterior uveitis in May, and her renal dysfunction relapsed in November. A renal biopsy showed diffuse TIN. We made a diagnosis of TINU syndrome because we could not explain the origin, and treated her with a systemic corticosteroid. Her renal function and ocular symptoms have been improving. The patient had HLA-A24, -B7, -DR1, -C*07: 02 and -DQB1*05: 01: 01. We collected 102 Japanese cases in PubMed, Ovid MEDLINE, and the Japanese Medical Abstracts Society and compared our case with the previous cases.
CONCLUSIONS: This disorder affects primarily young females (median age, 14 years), and the most common symptom is fever (44/102 cases). We conducted a statistical analysis using contingency table and Pearson’s chi-square test, for HLA-A2 and A24, and calculated the odds ratio (OR). There are no significant differences (A2 was present in 7/22 cases and in 19/50 controls, p value (P) 0.61, OR 0.76 (95% confidence interval (CI)) 0.27–2.2; A24 was present in 10/22 cases and in 33/50 controls, P 0.10, OR 0.43, CI 0.16–1.2).
Keywords: Asian Continental Ancestry Group, HLA-A Antigens, Japan - ethnology, Nephritis, Interstitial - therapy, Risk Factors, Syndrome, Uveitis - therapy
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