This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnostic procedures, Subject name: Pathology
All of the following can be seen in bone marrow of myelodysplastic syndrome (MDS) cases, except: 
Select and explain. 
A. Pseudo-Pelger-Huet cells, B. Cloud-like megakaryocytes, C. Ring sideroblasts, D. Megaloblastic change in erythroid precursors
B: Cloud-like megakaryocytes
Answer: B: Cloud-like megakaryocytes 
Explanation: 'Cloud-like' megakaryocytes are seen in primary myelofibrosis. Morphological features of myelodysplastic syndrome (MDS) seen in bone marrow: Rring sideroblasts Megaloblastic erythroid maturation Nuclear budding abnormalities in erythroid precursors (dyserythropoiesis) Pseudo-Pelger-Huet cells Megakaryocytes with single nuclear lobes or multiple separate nuclei ('pawn ball' megakaryocytes)