| Title | Birdshot-like chorioretinopathy in lymphoid interstitial pneumonia due to hypogammaglobulinopathy | 
| Abstract Nr. | 134 | 
| Purpose | To describe a patient with a birdshot-like choroidoretinopathy secondary to a hypogammaglobulinopathy, complicated with lymphoid interstitial pneumonia and persistent lymphadenopathy. | 
| Methods | An 18 - year old girl presented with an asymptomatic bilateral papillary oedema and chorioretinal infiltrates. These findings were noted during routine follow-up for hydroxychloroquin (HCQ) use. She underwent a full ophthalmological and systemic work-up, including electroretinography and fluorescein and ICG angiographies. | 
| Results | This patient was diagnosed with a lymphoid interstitial pneumonia due to a hypogammaglobulinopathy at the age of 13. Since then she’s treated with monthly intravenous immunoglobulines and oral HCQ. Annual visits to exclude hydroxychloroquine toxicity revealed no abnormalities until 2 years ago. One year ago visual acuity was 12/10 without correction in both eyes. Slit-lamp examination was unremarkable. However, fundoscopy revealed bilateral papilloedema and chorioretinal infiltrates with a birdshot-like appearance. On fluo-angiography a bilateral hot disc was present, whilst the chorioretinal infiltrates were hypofluorescent on ICG. ERG and colour vision were normal. MRI brain revealed no signs of raised intracranial pressure. HLA- A29 analysis was negative, as were the blood levels of ACE.  | 
| Conclusion | Hypogammaglobulinopathy complicated with lymphoid interstitial pneumonia may present with an HLA-A29 negative phenocopy of Birdshot choroidoretinopathy. | 
| Last name | DE MAEYER | 
| Initials | V | 
| Department | Dept of Ophthalmology, Ghent University Hospital | 
| City | Ghent | 
| Last name | KESTELYN | 
| Initials | P | 
| Department | Dept of Ophthalmology, Ghent University Hospital | 
| City | Ghent | 
| Last name | HAERYNCK | 
| Initials | F | 
| Department | Dept of Paediatrics, Ghent University Hospital | 
| City | Ghent | 
| Last name | DE BAETS | 
| Initials | F | 
| Department | Dept of Paediatrics, Ghent University Hospital | 
| City | Ghent | 
| Last name | LEROY | 
| Initials | BP | 
| Department | Dept of Ophthalmology, Ghent University Hospital | 
| City | Ghent |