Front Matter -- Malaria - one swallow makes a summer -- The significance of irregularly contracted cells and hemighosts in sickle cell disease -- Striking dyserythropoiesis in sickle cell anemia following an aplastic crisis -- A normal mean cell volume does not exclude a diagnosis of megaloblastic anemia -- Prominent Howell-Jolly bodies when megaloblastic anemia develops in a hyposplenic patient -- A ghostly presence - G6PD deficiency -- G6PD deficiency in patients identified as female -- The cause of sudden anemia revealed by the blood film -- Choreo-acanthocytosis -- Lead poisoning -- Dysplastic neutrophils in an HIV-positive woman -- Help with HELLP -- Neutrophil dysplasia induced by granulocyte colony-stimulating factor -- COVID-19 and acute kidney injury -- Diagnosis of pyrimidine 5′ nucleotidase deficiency suspected from a blood film -- Bone marrow aspirate in Chédiak-Higashi syndrome -- Phytosterolemia -- Pseudo-Chédiak-Higashi inclusions together with Auer rods in acute myeloid leukemia -- Botryoid nuclei resulting from cocaine abuse -- Infantile pyknocytosis -- Splenic rupture in cytomegalovirus infection -- A new diagnosis of monoclonal B-cell lymphocytosis with cytoplasmic inclusions in a patient with COVID-19 -- Pseudoplatelets and apoptosis in Burkitt lymphoma -- What is a promonocyte? -- Persistent neonatal jaundice resulting from hereditary pyropoikilocytosis -- Auer rods or McCrae rods? -- Observation of Auer rods in crushed cells in acute promyelocytic leukemia -- Alpha chain inclusions in peripheral blood erythroblasts and erythrocytes -- Dyserythropoiesis in visceral leishmaniasis -- Compound heterozygosity for hemoglobins S and D -- Granular B lymphoblastic leukemia -- Hyposplenism in adult T-cell leukemia/lymphoma -- Voxelotor in sickle cell disease -- The importance of a negative image -- Seeing what isn't there -- A young woman with sudden onset of a severe coagulation abnormality -- Immature Plasmodium falciparum gametocytes in bone marrow -- Acute myeloid leukemia with myelodysplasia-related changes showing basophilic differentiation -- Thiamine-responsive megaloblastic anemia in an Iraqi girl -- Teardrop poikilocytes in metastatic carcinoma of the breast -- A blood film that could have averted a splenectomy -- Russell bodies and Mott cells -- Dutcher bodies -- Acute myeloid leukemia with inv(16)(p13.1q22) -- Dysplastic macropolycytes in myelodysplasia-related acute myeloid leukemia -- Diagnosis of cystinosis from a bone marrow aspirate -- Emperipolesis in a patient receiving romiplostim -- Mechanical hemolysis: a low mean cell volume does not always represent microcytosis -- Transplant-associated thrombotic microangiopathy -- Neuroblastoma in the bone marrow -- Gray platelet syndrome -- Diagnosis of systemic lupus erythematosus from a bone marrow aspirate -- Diagnosis from a blood film following a dog bite -- Interpreting a postpartum Kleihauer test -- Dengue fever in returning travellers -- Auer rod-like inclusions in multiple myeloma -- Azurophilic granules in myeloma cells -- Plasmodium knowlesi -- The cytological features of NPM1 -mutated acute myeloid leukemia -- Irregularly contracted cells in Wilson disease -- Pseudo-Pelger-Huët neutrophil morphology due to sodium valproate toxicity -- The distinctive cytological features of T-cell prolymphocytic leukemia -- Eosinophil morphology in the reactive eosinophilia of Hodgkin lymphoma -- Malaria pigment -- Salmonella colonies in a bone marrow film -- Severe babesiosis due to Babesia divergens acquired in the UK -- Congenital acute megakaryoblastic leukemia -- Basophilic differentiation in transient abnormal myelopoiesis -- Methylene blue-induced Heinz body hemolytic anemia in a premature neonate -- Neutrophil vacuolation in acetominophen-induced acute liver failure -- Howell-Jolly bodies in acute hemolytic anemia -- The distinctive micromegakaryocytes of transformed chronic myeloid leukemia -- Copper deficiency -- Chronic neutrophilic leukemia -- Neutrophilic leukemoid reaction in multiple myeloma -- Persistent polyclonal B lymphocytosis -- Non-hemopoietic cells in the blood and bone marrow -- It's a black day - metastatic melanoma in the bone marrow -- Dehydrated hereditary stomatocytosis -- Circulating lymphoma cells in intravascular large B-cell lymphoma -- Unusual inclusions in hemoglobin H disease post-splenectomy -- An unexpectedly bizarre blood film in hemoglobin H disease -- Acute myeloid leukemia with a severe coagulopathy and t(8;16)(p11;p13) -- Cold autoimmune hemolytic anemia secondary to atypical pneumonia -- A confusing 'white cell count' - circulating micromegakaryocytes in post-thrombocythemia myelofibrosis -- Diagnosis of follicular lymphoma from the peripheral blood -- Transformation of follicular lymphoma -- Cytology of systemic mastocytosis -- Systemic mastocytosis - the importance of looking within bone marrow fragments -- Schistocytosis is not always microangiopathic hemolytic anemia -- Hemoglobin C disease -- Hemoglobin St Mary's -- Congenital sideroblastic anemia in a female -- A puzzling case of methemoglobinemia -- Hodgkin lymphoma in a bone marrow aspirate -- Giant proerythroblasts in pure red cell aplasia due to parvovirus B19 infection in a patient with rheumatoid arthritis -- A myeloid neoplasm with FIP1L1::PDGFRA presenting as acute myeloid leukemia -- Breast implant-associated anaplastic large cell lymphoma -- Large granular lymphocytosis induced by dasatinib -- The distinctive cytology and disease evolution of blastic plasmacytoid dendritic cell neoplasm -- Platelet phagocytosis as a cause of pseudothrombocytopenia -- Test yourself -- Answers to test cases -- Index