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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]
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 ...
A – Cabot ring B – Howell-Jolly body Cabot ring Cabot rings are thin, red-violet staining, threadlike strands in the shape of a loop or figure-8 that are found on rare occasions in red blood cells (erythrocytes).
Pappenheimer bodies are visible with a Wright and/or Giemsa stain. Confirmation of non-heme iron in the granules is made with a Perls' Prussian blue stain, and this atypical red blood cell is then known as a siderocyte. [5]
Inclusion bodies have a non-unit (single) lipid membrane [citation needed].Protein inclusion bodies are classically thought to contain misfolded protein.However, this has been contested, as green fluorescent protein will sometimes fluoresce in inclusion bodies, which indicates some resemblance of the native structure and researchers have recovered folded protein from inclusion bodies.
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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.
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