Physicians in India commonly encounter anaemic vegan patients with peripheral smear report suggestive of macrocytosis. Many of them blindly start treating the patient for megaloblastic anaemia. Reticulocyte count of the patient is often not ordered during initial evaluation. Here, we report a case where patient was diagnosed as megaloblastic anaemia as he had macrocytosis, pancytopenia and features of hemolysis. However, patient got mesenteric vein thrombosis during hospital stay, and was eventually diagnosed to be having PNH clone. Case is presented to reiterate basic fact that reticulocyte count is often missed in initial workup of patients with anaemia and to emphasise on classic triad of PNH i.e. pancytopenia, hemolysis and venous thrombosis.