The adenoid tonsils, or often just simply the adenoids (also known as the nasopharyngeal or pharyngeal tonsils), are paired foci of lymphatic tissue located on the superoposterior wall of the nasopharynx and form part of Waldeyer's ring.
The anatomy curriculum is one of our curriculum articles and aims to be a collection of articles that represent the core anatomy knowledge for radiologists and imaging specialists.
Head and neck anatomy
Abdominal and pelvic anatomy
This article lists a series of labeled imaging anatomy cases by system and modality.
CT head: non-contrast axial
CT head: non-contrast coronal
CT head: non-contrast sagittal
CT head: angiogram axial
CT head: angiogram coronal
CT head: angiogram sagittal
CT head: venogram axial
The lymphatic system (also known as the lymphoid system or systema lymphoideum in Terminologia Anatomica) is the collective term given to the lymphatic vessels and lymphoid tissues in the body 1,4.
Occasionally the lymphatic system is considered with the reticuloendothelial system ...
The lymph nodes (commonly shortened to nodes, and known as nodus lymphoideus in TA 4) collectively form one of the secondary lymphoid organs.
Macroscopically, a normal lymph node is a small ellipsoid structure, approximately 0.1 to 2.5 cm in maximal length 2,3. Nodes often possess a reniform mo...
The lymphoid organs represent sites in the body in which lymphocytes are concentrated. They are divided into primary and secondary lymphoid organs 1.
Primary lymphoid organs are responsible for the generation of new lymphocytes:
Secondary (a.k.a. periph...
The reticuloendothelial system (RES) comprises a number of tissues:
liver Kupffer cells
Retrorenal spleen refers to variant position of the spleen, when its inferior portion lies posterior to the upper pole of the left kidney.
This normal variant occurs in ~20% of patients, with the finding more common in patients who lie supine 1.
Recognition of this variant is important to avoi...
The spleen is an organ of the hematological system and has a role in immune response, storage of red blood cells and hematopoiesis.
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...
Splenunculi, also known as supernumerary spleens, accessory spleens, or splenules, are small nodules of spleen that are separate from the rest of the organ.
They are common, seen in up to 16% of CTs of the abdomen and up to 30% of autopsies 2.
Accessory spleens are c...