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The article explains hemostasis, venous and arterial thrombosis, its symptoms, diagnostic tools, causes and treatment options. Learn more about it on Lecturio.

Myelodysplasia

Myelodysplasias are a group of malignant myeloid stem cell disorders characterized by dysplasias and/or cytopenias and there is an increased risk of transformation into acute myelogenous leukemia. The pathogenesis of myelodysplasias is not completely understood but, like other neoplasms, it too involves oncogenic mutations that may arise spontaneously or as a result of environmental exposure. The diagnosis of myelodysplasia is done by finding changes in the peripheral blood smear and bone marrow aspirate. Management of myelodysplasias depends on the percentage of blast cells.

Blood Transfusion: ABO and Rh Blood Group System

Blood transfusion is a common and safe procedure where blood and/or blood products are transferred from the circulation of one person (known as a donor) to the circulation of another person (known as a recipient) or to the circulation of the patient himself (autologous transfusion) at a different time. It helps to replace blood loss following trauma, surgery, or hematologic illnesses, e.g., leukemia.

Malignant Blood Disorders — Myeloproliferative Disorders, Myelodysplastic Disorders and Multiple Myeloma

A number of malignant disorders of the blood are characterized by abnormal and uncontrolled growth of certain blood cell types that are associated with prolonged survival even after the establishment of the diagnosis. Myeloproliferative diseases are a collection of disorders of the blood cell lines that are characterized by elevated platelets, white blood cells or red blood cells in the peripheral blood. The myelodysplastic syndromes are quite the opposite as they are characterized by the inability of the bone marrow to produce the normal and different blood cells; hence, can be also defined as bone marrow failure disorders. Myeloma, on the other hand, is a malignant condition of the plasma cells that is characterized by uncontrolled activation, proliferation and the production of abnormal antibodies.

Myeloproliferative Disorder — Symptoms and Treatment

Patients with myeloproliferative diseases can have chronic myelogenous leukemia, polycythemia vera, essential thrombocythemia or myelofibrosis. Disease transformation from one type into another is common. Different tyrosine kinase genes mutations have been identified and found to be related to myeloproliferative diseases which include bcr-abl, JAK2 and CALR mutations. Treatment of proliferative diseases is usually symptomatic, but disease specific treatments are also available.

Polycythemia — Symptoms, Causes and Treatment

Red blood cells perform an important function of supplying adequate oxygen to all tissues. Increased synthesis of these red blood cells, arising either de novo or secondary to other conditions, is called polycythemia. Read on to find out more about the different types of polycythemia and how they may present.

Leukemia (Blood Cancer) — Classification and Typification

When the physicist and Nobel Prize winner Marie Curie died in 1934, her blood was flooded by white blood cells. During her work as a researcher and the years of contact with radioactive substances, she had developed a leukemia. There are various causes and forms for the disease, which is also known as blood cancer. Learn here about these and you will be well versed in the popular examination topic Leukemia.

Non-Hodgkin's Lymphoma — Diagnosis and Staging

Non-Hodgkin's lymphomas (NHL) are hematological malignancies with high prevalence worldwide (accounts for about 4 % of all cancer cases and 2.7 % of all cancer deaths). They are cancers of the lymphatic tissues (mainly lymph nodes), affecting the lymphocytes, either B-cells (70 %) or T-cells/NK cells (30 %). NHLs are five times more common than the Hodgkin's lymphoma (HL). The following article discusses both B-cell type NHLs and T-cell type NHLs.

Follicular Lymphoma — Diagnosis and Survival Rate

There are two types of lymphomas - Hodgkin Lymphoma (Hodgkin`s Disease) and Non-Hodgkin Lymphoma. The follicular lymphoma belongs to the second group. It is a slow-growing B-cell lymphoma, and the second most common sub-type of NHL; most often occurs due to chromosomal translocation t(14;18) causing bcl-2 gene rearrangement. Most of the patients with FL are asymptomatic; hence they remain undiagnosed for years and usually detected in the advanced stages.

Types of Leukemia

Leukemia is blood cancer, this condition is characterized by exceeded amount of immature white blood cells in the blood stream (blasts), which normally remain in the bone marrow for their further maturity or sent to special organs (spleen, thymus) to get ready for their proper functioning. White blood cells are responsible for the adequate immune reaction of the body to various antigens (infections, malignant cells, foreign bodies, allergens); hence, immature cells cannot cover this function fully and fail to perform in the way m proper white cell do. Thus, the body easily contracts different infections as it is not capable to fight them, as the disease advances the bone morrow becomes exhausted shooting even more damaged cells or stops producing blood cells at all (hemogenic collapse).

Burkitt Lymphoma — Causes and Symptoms

Burkitt lymphoma (small non-cleaved cell lymphoma) is one of the most aggressive and rapidly growing non-Hodgkin's lymphomas, with obvious predominance in children and young adults. This type of tumor requires urgent therapeutic intervention as the CNS and the bone marrow are involved in the malignant process since early stages of the disease.

Microscopic Anatomy: Blood

Blood (Latin: sanguis, Greek: haima) is a suspension of cells in a saline solution containing protein. It makes up 6-8 % of the total body weight and has a pH value of 7.4. The blood carries out many essential functions and is the pivotal point of the whole organism. The following article provides, at a glance, the most important facts about this vital body fluid called blood.

Normocytic Anemia: Aplastic Anemia (Bone Marrow Aplasia) — Primary and Secondary Causes

If not treated the aplastic anemia diseases leads to death. Everything you have to know as a future physician in this article.

Hemostaseology: Differential Diagnosis of Blood Disorders

Regardless if it’s playing sport, around the home or at work, cuts can happen everywhere in day to day life! There is a short spray of blood then a few minutes later the wound has closed itself with only a plaster reminding us of the little faux pas. But what happens if the apparently minor moment of carelessness suddenly becomes a life threatening event? What is ‘hemophilia’ as it’s commonly known? This article explains the range of blood disorders, which of them are hereditary and how an almost incident free life can still be led despite having one.

Pharmacology and Toxicology: Anticoagulants

Many people suffer from cardiovascular diseases. Stroke and myocardial infarction rank among the most frequent causes of death due to cardiovascular diseases. The causes are blocked vessels and the resulting insufficient blood supply of vital organs and tissue. Surgeries are usually the last resort and, at the same time, the start of a new, safe and hopefully healthier life. In this article, you get to know more about the mechanism of action, the medical application as well as the possible side effects of anticoagulants.

Microcytic Anemia: Iron Deficiency Anemia (Ferropenic)

In practice, anemia often appears in the blood count, accompanying many acute and chronic diseases. Clarification is definitely recommended because already a lowered hemoglobin value alone can be the first important hint for an undetected underlying disease.

Chronic Lymphocytic Leukemia (CLL) — Staging and Prognosis

Chronic lymphocytic leukemia (CLL) affects the B-cells of the immune system and is, as the most common leukemia in adults, an important hematological differential diagnosis. It often hardly progresses for years and therefore a CLL does not always need immediate therapy. In the past years especially, a lot has happened with regard to diagnostic options and treatment, so that being informed about cytogenetic diagnostics and new treatment methods is extremely important.

Acute Myeloid Leukemia (AML) — Classification and Survival Rate

Acute myeloid leukemia is due to a malignant transformation of the hematopoietic stem cells. It is predominantly seen in the age group of 50 – 60 years and is characterized by the arrest of leukocyte development in the early stage of development. Diagnosis is based on the presence of blast cells in the peripheral circulation. It is treated by chemotherapy, which includes treatment of remission and post-induction remission. Refractory cases of acute myeloid leukemia are treated by bone marrow transplants. Complications of AML include anemia, infections and bleeding, along with acute medical emergencies such as necrotizing enterocolitis, hyperleukocytosis and tumor lysis syndrome.

Acute Lymphoblastic Leukemia (ALL) — Classification, Laboratory Evaluation and Survival Rate

Acute lymphoblastic leukemia is a malignant neoplastic disease that arise from lymphoid cell lines. It is the most malignancy in childhood. The disease manifests quickly over a span of days or weeks. Excessive proliferation of immature blasts replaces the normal bone marrow cells resulting in bruises, bleeding and infection that associated with fever. Diagnosis of ALL is established by complete blood count (CBC) which shows leukocytosis , bone marrow study which shows more than 20% blast cells. It has a good prognosis.

Chronic Myeloid Leukemia (CML) — Classification and Staging

Chronic myelogenous leukemia, also called chronic myeloid leukemia (CML), is an acquired monoclonal expansion of white blood cells of myeloid lineage. It is common in middle and old age accounting for 20% of adult leukemia. It is sometimes diagnosed incidentally on routine blood investigations or the presence of splenomegaly on examination. CML is classically associated with the Philadelphia chromosome (BCR-ABL fusion gene) and has excellent prognosis with modern therapy.

Phlebothrombosis and Deep Vein Thrombosis (DVT) — Diagnosis and Classification

Phlebothrombosis is a very common and very serious condition. Blood clots in veins can mobilize and cause significant harm and even death in some cases by blocking downstream vessels. This condition needs to be thought of in all new hospital admissions, especially those who will be particularly immobile or those undergoing operations, so they can be given medical prophylaxis to reduce the chance of a blood clot forming in the venous system.

Hodgkin's Lymphoma (Hodgkin's Disease) — Stages, Classification and Prognosis

Hodgkin's disease is one of the first cancerous diseases for which effective treatment options have been developed. While this disease still ended lethally earlier, the prognosis is very good today. This is particularly due to the radiation sensitivity of lymphoma. 80 % of the patients can be cured permanently. This article provides a comprehensive overview of the hematologic disease, the symptoms, diagnosis and therapeutic principles.

Overview of Anemia: Microcytic, Macrocytic and Normocytic Anemia

Anemia is one of the major reasons why patients present with shortness of breath, fatigue, pallor and weakness in clinics. Anemia is a reduction of the oxygen carrying capacity of the blood that results in decreased oxygen supply to tissue cells. It is of utmost importance for doctors to rule out anemia as a cause of this range of symptoms as not giving prompt medical treatment can result in severer symptoms and even fatality.

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Introduction to Hematology

Full Introduction to Hematology

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Your Educators of course Introduction to Hematology

Paul Moss, PhD

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