Bilateral central retinal vein occlusion as an initial presentation of Waldenström macroglobulinemia: a case report oleh Suraj Shrestha, Elisha Poddar, Bibhav Bashyal, Aayush Adhikari, Prabin Pathak, Suman Acharya, Surendra Sapkota, Anjan Bhattarai, Samriddha Raj Pant, Anjan Shrestha