“…Over the recent years, there have been a number of anecdotal case reports of BRVO with many systemic diseases, including Bartonella [ 17 ], Behcet's disease [ 18 , 19 ], Coats' disease [ 20 ], Crohn's disease [ 21 ], deep-sea diving [ 22 ], Eales' disease [ 23 ], focal retinal phlebitis [ 24 ], high altitude [ 25 ], human immunodefi ciency virus [ 26 , 27 ], infl iximab treatment [ 28 ], interferon therapy [ 29 ], lipemia retinalis [ 30 ], during fi ngolimod treatment of multiple sclerosis [ 31 ], ocular candidiasis [ 32 ], ocular Lyme borreliosis [ 33 ], ocular tuberculosis [ 34 ], primary intraocular lymphoma [ 35 ], pseudoexfoliation [ 36 , 37 ], quetiapine fumarate [ 38 ], sarcoidosis [ 39 -42 ], superior ophthalmic vein thrombosis [ 43 ], systemic lupus erythematosus [ 44 ], Takayasu's arteritis [ 45 ], tamoxifen [ 46 ], toxoplasmic chorioretinitis [ 47 ], Tsutsugamushi disease [ 48 ], and Waardenburg syndrome [ 49 ]. As discussed above, the association of a condition with a systemic disease does not always mean cause and effect.…”