A case of Anaemia which was investigated and found to be a case of Acquired Pure Red Cell Aplasia. Pure red cell aplasia (PRCA) is a syndrome defined by a normocytic normochromic anaemia with severe reticulocytopenia and marked reduction or absence of erythroid precursors from the bone marrow. It is commonly due to primary autoimmune or infection and secondary to myeloproliferative disorder. In this discussion we are presenting a case of normocytic normochromic anaemia which was admitted to our hospital after being investigated and treated several times outside. On extensive workup, we diagnosed the case as PRCA secondary to Thymoma and initiated the appropriate management.