Articles
Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and continuously improved upon by countless contributing members. Our dedicated editors oversee each edit for accuracy and style. Find out more about articles.
336 results found
Article
Hepatic lymphoma
Hepatic lymphoma is a term given to any form of hepatic involvement with lymphoma. This can be broadly divided into:
secondary hepatic involvement with lymphoma: most common by far, many tend to be non-Hodgkin lymphoma (NHL) 1
primary hepatic lymphoma: extremely rare
Pathology
Risk factors f...
Article
Yttrium-90 ibritumomab tiuxetan
Yttrium-90 ibritumomab tiuxetan, also known by the trade name Zevalin (Acrotech Biopharma LLC, USA), is a theranostic radiopharmaceutical approved for the treatment of patients with relapsed or refractory low grade or follicular non-Hodgkin lymphoma (NHL). More specifically, it is a radioimmunot...
Article
Diffuse large B-cell lymphoma
Diffuse large B-cell lymphoma (DLBCL) is the most common subtype of non-Hodgkin lymphoma.
Epidemiology
Associations
Diffuse large B-cell lymphoma is sometimes associated with immunodeficiency, including acquired immunodeficiency syndrome.
Pathology
Classification
In the 2016 WHO classifica...
Article
AIDS-related diffuse large B-cell lymphoma
AIDS-related diffuse large B-cell lymphomas are one of the immunodeficiency-associated CNS lymphomas, and in Western countries represented a dramatic increase in primary CNS lymphoma during the HIV/AIDS epidemic of the 1980s, although the incidence is likely lower in patients treated with antire...
Article
H-shaped vertebra
H-shaped vertebrae, also known as Lincoln log vertebrae, are a characteristic finding of sharply delimited central endplate depression, classically seen in approximately 10% of patients with sickle cell disease, and results from microvascular endplate infarction (Figure 1) 3.
It may occasionall...
Article
Graft versus host disease
Graft versus host disease (GvHD) is a frequent complication of allogeneic hematopoietic stem cell transplantation, commonly known as bone marrow transplantation. Antirejection drugs have reduced the incidence, although it does still frequently occur.
Pathology
Graft versus host disease can pr...
Article
Aplastic anemia
Aplastic anemia is a rare hematopoietic stem-cell disorder. The condition results in pancytopenia and hypocellular bone marrow. Most cases are acquired, however, there are unusual inherited forms.
Pathology
Aplastic anemia manifests as a marked reduction in the number of pluripotent hematopoie...
Article
Diffuse T1 bone marrow signal loss
Diffuse T1 vertebral bone marrow signal loss is associated with replacement of fatty marrow by edema or cellular tissue.
Radiographic features
MRI
T1-weighted imaging without fat suppression is one of the most important sequences for distinguishing between normal and abnormal bone marrow. Ab...
Article
Peripheral T cell lymphoma
Peripheral T cell lymphoma is an uncommon, heterogeneous group of lymphoma. It can account for around 5-15% of non-Hodgkin lymphoma (NHL).
Terminology
The word "peripheral" does not mean involvement in the extremities but refers to tumor cells that arise from lymphoid tissue outside of the bon...
Article
Spleen
The spleen is an organ of the hematological system and has a role in immune response, storage of red blood cells and hematopoiesis.
Gross anatomy
The spleen is a wedge-shaped organ lying mainly in the left upper quadrant (left hypochondrium and partly in the epigastrium) and is protected by th...
Article
Tumor lysis syndrome
Tumor lysis syndrome (TLS) is an entity representing a constellation of laboratory and clinical derangements inclusive of:
hyperuricemia
hyperphosphatemia
hypocalcemia and
hyperkalemia
It is considered an oncological emergency and can occur following treatment of malignancies with high cell...
Article
Primary pleural lymphoma
Primary pleural lymphoma is extremely rare, especially in immunocompetent patients.
Epidemiology
Primary pleural lymphoma accounts for <0.5% of all non-Hodgkin lymphoma 2 and ~2.5% of primary chest wall tumors 4.
Pathology
Primary pleural lymphoma may be Hodgkin or non-Hodgkin lymphoma with...
Article
Chronic myelomonocytic leukemia
Chronic myelomonocytic leukemia (CMML) is a relatively rare clonal hematologic disorder. In the World Health Organizatiοn classification, it is listed as a disorder with features of both myelodysplastic syndromes and myeloproliferative neoplasms.
Clinical presentation
Can be variable but many ...
Article
Lymph node enlargement
Lymph node enlargement (rarely lymphadenomegaly) is often used synonymously with lymphadenopathy, which is not strictly correct.
Terminology
Lymphadenopathy (or adenopathy) is, if anything, a broader term than lymph node enlargement, referring to any pathology of lymph nodes, not necessarily r...
Article
Splenic lymphoma
Splenic lymphoma, also termed as lymphomatous involvement of the spleen, represents the most common malignancy to involve the spleen. They are commonly secondary, rarely being primary (referred to as primary splenic lymphoma).
This article focuses on the location-specific primary and secondar...
Article
VEXAS syndrome
VEXAS (vacuoles, E1 enzyme, X-linked, autoinflammatory, somatic) syndrome is a severe, treatment-refractory, monogenic, multiorgan, autoinflammatory condition with vasculitic and hematological complications.
Epidemiology
VEXAS syndrome is likely to be rare, but also likely to be underdiagnosed...
Article
Langerhans cell histiocytosis
Langerhans cell histiocytosis (LCH) is a rare multisystem disease with a wide and heterogeneous clinical spectrum and variable extent of involvement.
Terminology
Langerhans cell histiocytosis was previously known as histiocytosis X. The newer term is preferred as it is more descriptive of its...
Article
Bing-Neel syndrome
Bing-Neel syndrome is an extremely rare neurological complication of Waldenström macroglobulinemia where there is malignant lymphocyte infiltration into the central nervous system (CNS).
Epidemiology
The exact incidence is unknown, however, in one study of patients with Waldenström macroglobul...
Article
Sickle cell disease (abdominal manifestations)
Abdominal manifestations of sickle cell disease (SCD) are wide and can involve many organs.
For a general discussion, please refer to sickle cell disease.
Splenic
splenomegaly
may occur transiently with the sequestration syndrome, where rapid pooling of blood occurs in the spleen, resulting ...
Article
Primary myelofibrosis
Primary myelofibrosis is a myeloproliferative neoplasm in which the bone marrow is replaced with collagenous connective tissue resulting in progressive fibrosis. It is characterized by:
extramedullary hematopoiesis
progressive splenomegaly
anemia
variable change in the number of granulocytes...
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