Choroidal neovascularization secondary to tubulointerstitial nephritis and uveitis syndrome (TINU) in an adult patient
© Heymann et al. 2015
Received: 21 June 2015
Accepted: 18 September 2015
Published: 7 October 2015
Inflammation is a well-known risk factor for the development of choroidal neovascularization (CNV), yet not all causes of intraocular inflammation have been documented to cause CNV. Tubulointerstitial nephritis and uveitis syndrome (TINU) is a rare cause of intraocular inflammation mostly in pediatric patients and only seldom has been associated with development of CNV.
A 34-year-old pregnant female with a past history of bilateral ocular inflammation secondary to TINU presents 1 year after diagnosis with vision loss in the left eye. Clinical examination and investigations show the development of CNV in the left eye. The patient was treated with ranibizumab (Genentech, San Francisco, CA) intravitreal injections with improvement in symptoms and clinical findings.
We report the first case of CNV secondary to TINU in an adult patient. The CNV associated with TINU is responsive to intravitreal anti-vascular endothelial growth factor (anti-VEGF) therapy.
Various conditions that lead to intraocular inflammation can be associated with the development of choroidal neovascularization (CNV) [1, 2]. Tubulointerstitial nephritis and uveitis syndrome (TINU) is a rare entity first described in 1975 by Dobrin and colleagues , and has seldom been associated with secondary CNV . Since TINU was first described, there have been more than 150 cases reported mostly in the pediatric nephrology and ophthalmology literature [5, 6]. To date, however, there have been only two documented cases of CNV secondary to TINU reported in the literature  with both of these cases in pediatric patients. Herein we report a case of CNV secondary to TINU in an adult patient which to our knowledge is the first such to be described.
A 34-year-old pregnant female at 33 weeks gestation presented as a consult to the retina service with chief complaint of sudden decreased vision in the left eye beginning 1 month ago. The patient was first diagnosed with TINU 1 year prior by a uveitis specialist. At that time, she had presented with an inflamed, painful left eye, 2+ cell and flare, posterior synechiae, and a negative work up—including rapid plasma reagin, quantiFERON Gold test, FTA-ABS, human leukocyte antigen (HLA)-B27 analysis by flow cytometry, and Lyme titers. Serum beta 2-microglobulin was found to be 2.43 (normal <1.80 mg/dl), and urine beta 2-microglobuin was found to be 4.70 mg/dl (normal <0.24 mg/dl). Based on the clinical picture and laboratory findings, a diagnosis of TINU was made and the patient was referred to nephrology for renal evaluation. The patient was subsequently lost to follow-up.
The patient delivered at 40 weeks gestation and was seen 3 days post-partum. The patient’s visual acuity, exam, and SD-OCT were unchanged. Fluorescein angiography was obtained which revealed leakage consistent with a diagnosis of CNV (Fig. 1b). The patient was not breastfeeding and was treated with two intravitreal injections of ranibizumab at 1 month apart. At the most recent follow-up 8 weeks following the first injection, BCVA improved to 20/50 in the left eye. OCT imaging showed consolidation of the choroidal neovascularization (Fig. 2b).
Tubulointerstitial nephritis and uveitis is an uncommon entity that is described mostly in children with a median age of diagnosis of 15 years and has a 3:1 female predominance [7, 8]. Establishing the diagnosis of TINU is challenging and requires clinical suspicion. No specific laboratory study is diagnostic of TINU, but there are several laboratory abnormalities that suggest the diagnosis in the proper clinical context. Patients with TINU have been reported to have anemia, eosinophilia, elevations in ESR and CRP, sterile pyuria and abnormal elevations in serum, and urine beta-2 microglobulin [9, 10]. Renal disease can be confirmed by biopsy, which shows tubulointerstitial edema and infiltration of lymphocytes, plasma cells and histiocytes, but this is only rarely done . More recently, a strong association has been shown between TINU and the HLA-DRB1*0102 . The diagnosis of TINU was made clinically in our patient with demonstration of bilateral anterior uveitis, elevated serum and urine beta-2 microglobulin, and otherwise negative workup for other causes of uveitis. As an additional measure, we tested the patient for HLA-DRB1*0102. The positive result strongly supports the clinical diagnosis of TINU.
Generally, the ocular inflammation of TINU preferentially affects the anterior segment, although posterior inflammation has been reported [4–8]. Intraocular inflammation is a well-established risk factor for the development of CNV and has been described in association with a wide variety of inflammatory conditions including multifocal choroiditis and uveitis syndrome, punctate inner choroidopathy, and ocular histoplasmosis [1, 2]. Rarely has CNV been described secondary to TINU and only in the pediatric population . Our patient clearly demonstrated SD-OCT and angiographic evidence of choroidal neovascularization in the absence of other identifiable causes. This is the first reported case of CNV secondary to TINU in an adult, and as such, patients should be counseled and monitored for the occurrence of this rare complication.
Multiple studies have demonstrated the efficacy of anti-VEGF therapy in the treatment of CNV due to age-related macular degeneration [12, 13]. There are, however, no established guidelines for treatment of inflammatory CNV. The small number of patients with these rare conditions preclude the possibility of large randomized trials to evaluate treatment efficacy. A recent review, however, evaluated 16 studies of anti-VEGF therapy for CNV secondary to non-age-related macular degeneration conditions and concluded that positive treatment outcomes in these patients should encourage clinicians to consider bevacizumab and ranibizumab for rare causes of CNV . We conclude based on these considerations, and the favorable outcome for our patient, that treatment with anti-VEGF should be considered as these lesions appear to show a favorable response to treatment.
Consent to publish
Consent to publish relevant clinical photographs has been obtained from the patient involved in this case.
human leukocyte antigen
spectral-domain optical coherence tomography
tubulointerstitial nephritis and uveitis syndrome
The authors would like to thank Andrea Birnbaum, MD, Paul Bryar, MD, and Ann Jayaram, MD.
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- D'Ambrosio E, Tortorella P, Iannetti L (2014) Management of uveitis-related choroidal neovascularization: from the pathogenesis to the therapy. J Ophthalmol 2014:450428PubMed CentralPubMedGoogle Scholar
- Kuo IC, Cunningham ET (2000) Jr Ocular neovascularization in patients with uveitis. Int Ophthalmol Clin 40:111–26View ArticlePubMedGoogle Scholar
- Dobrin RS, Vernier RL, Fish AL (1975) Acute eosinophilic interstitial nephritis and renal failure with bone marrow-lymph node granulomas and anterior uveitis. A new syndrome. Am J Med 59(3):325–333View ArticlePubMedGoogle Scholar
- Takemoto Y, Namba K, Mizuuchi K, Ohno S, Ishida S (2013) Two cases of subfoveal choroidal neovascularization with tubulointerstitial nephritis and uveitis syndrome. Eur J Ophthalmol 23(2):255–257View ArticlePubMedGoogle Scholar
- Liakopoulos V, Ioannidis I, Zengos N et al (2006) Tubulointerstitial nephritis and uveitis (TINU) syndrome in a 52-year-old female: a case report and review of the literature. Ren Fail 28(4):355–359View ArticlePubMedGoogle Scholar
- Abed L, Merouani A, Haddad E, Benoit G, Oligny LL, Sartelet H (2008) Presence of autoantibodies against tubular and uveal cells in a patient with tubulointerstitial nephritis and uveitis (TINU) syndrome. Nephrol Dial Transplant 23(4):1452–1455View ArticlePubMedGoogle Scholar
- Mandeville JT, Levinson RD, Holland GN (2001) The tubulointerstitial nephritis and uveitis syndrome. Surv Ophthalmol 46(3):195–208View ArticlePubMedGoogle Scholar
- Thomassen VH, Ring T, Thaarup J, Baggesen K (2009) Tubulointerstitial nephritis and uveitis (TINU) syndrome: a case report and review of the literature. Acta Ophthalmol 87(6):676–679View ArticlePubMedGoogle Scholar
- Sessa A, Meroni M, Battini G, Vigano G, Brambilla PL, Paties CT (2000) Acute renal failure due to idiopathic tubulo-intestinal nephritis and uveitis: “TINU syndrome”. Case report and review of the literature. J Nephrol 13(5):377–380PubMedGoogle Scholar
- Levinson RD, Park MS, Rikkers SM et al (2003) Strong associations between specific HLA-DQ and HLA-DR alleles and the tubulointerstitial nephritis and uveitis syndrome. Invest Ophthalmol Vis Sci 44(2):653–657View ArticlePubMedGoogle Scholar
- Mackensen F, Billing H (2009) Tubulointerstitial nephritis and uveitis syndrome. Curr Opin Ophthalmol 20(6):525–531View ArticlePubMedGoogle Scholar
- Brown DM, Michels M, Kaiser PK, Heier JS, Sy JP, Ianchulev T, ANCHOR Study Group (2009) Ranibizumab versus verteporfin photodynamic therapy for neovascular age-related macular degeneration: two-year results of the ANCHOR study. Ophthalmology 116(1):57–65.e5. doi:10.1016/j.ophtha.2008.10.018 View ArticlePubMedGoogle Scholar
- Rosenfeld PJ, Brown DM, Heier JS, Boyer DS, Kaiser PK, Chung CY, Kim RY, MARINA Study Group (2006) Ranibizumab for neovascular age-related macular degeneration. N Engl J Med 355(14):1419–31View ArticlePubMedGoogle Scholar
- Stuart A, Ford JA, Duckworth S et al (2015) Anti-VEGF therapies in the treatment of choroidal neovascularisation secondary to non-age-related macular degeneration: a systematic review. BMJ Open 5, e007746. doi:10.1136/bmjopen-2015-007746 PubMed CentralView ArticlePubMedGoogle Scholar