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Howell–Jolly bodies are found on red blood cells and contain chromatin remnants from basophilic cells. [7] Under normal conditions, these nuclear remnants are removed from the blood by the spleen's filtering capabilities. Howell-Jolly bodies can be identified and quantified using a blood smear or by flow cytometry. [2]
A Howell–Jolly body (marked by arrow) within an erythrocyte. A Howell–Jolly body is a cytopathological finding of basophilic nuclear remnants (clusters of DNA) in circulating erythrocytes. During maturation in the bone marrow, late erythroblasts normally expel their nuclei; but, in some cases, a small portion of DNA remains. The presence of ...
Splenectomy patients typically have Howell-Jolly bodies [11] [12] and less commonly Heinz bodies in their blood smears. [13] Heinz bodies are usually found in cases of G6PD (Glucose-6-Phosphate Dehydrogenase) and chronic liver disease. [14] A splenectomy also results in a greatly diminished frequency of memory B cells. [15]
Theodor Boveri originally observed the fact that abnormal nuclear morphologies commonly occur in cancer.Micronuclei are also referred to Howell-Jolly bodies; discovered by hematologists William Henry Howell and Justin Marie Jolly in erythrocytes.
On a blood smear, Howell-Jolly bodies may be seen within red blood cells. Primary treatment for patients with symptomatic HS has been total splenectomy, which eliminates the hemolytic process, allowing for normal hemoglobin, reticulocyte and bilirubin levels. The resultant asplenic patient is susceptible to encapsulated bacterial infections ...
Howell-Jolly body-like inclusions (HJBLi) are a hematopathological finding of an inclusion arising from detached DNA nuclear fragment in white blood cells caused by dysplastic granulopoiesis. [1] The inclusion is aptly named for its similar appearance of the Howell–Jolly body in erythrocytes. [2] The term was coined in 1989. [2]
Post-splenectomy: A major function of the spleen is the clearance of opsonized, deformed, and damaged erythrocytes by splenic macrophages. If splenic macrophage function is abnormal or absent because of splenectomy, altered erythrocytes will not be removed from the circulation efficiently. Therefore, increased numbers of target cells may be ...
Acanthocyte-like cells may be found in hypothyroidism, after splenectomy, and in myelodysplasia. [ 12 ] Acanthocytes should be distinguished from echinocytes , which are also called 'burr cells', which although crenated are dissimilar in that they have multiple, small, projecting spiculations at regular intervals on the cell membrane.