Pappenheimer bodies consist of:

AIIMS CRE, SNO-2024

Pathology & Genetics

Easy

Appeared in: AIIMS CRE, SNO-2024

Explanation

Pappenheimer bodies are abnormal granules found within red blood cells that are composed of iron.
They are essentially aggregates of the iron-storage protein, ferritin.
Their presence is confirmed with a Prussian blue stain, which specifically detects iron.
They are clinically significant and indicate disorders of iron metabolism, such as sideroblastic anemia, or are seen after the spleen has been removed (post-splenectomy).

Option A: Inclusions made of DNA are known as Howell-Jolly bodies, which are nuclear remnants left behind after the red blood cell nucleus is expelled.
Option C: Aggregates of RNA (specifically, ribosomes) within a red blood cell are referred to as basophilic stippling.
Option D: Lipids are a major component of the red blood cell membrane but do not form the type of intracellular inclusions known as Pappenheimer bodies.

Visual 1: Photomicrograph - A peripheral blood smear stained with Wright-Giemsa, showing a red blood cell with small, dark, clustered Pappenheimer bodies. An arrow should point to the inclusion.
Visual 2: Diagram - A comparative chart illustrating the four main types of red blood cell inclusions (Pappenheimer bodies, Howell-Jolly bodies, Basophilic stippling, Heinz bodies), showing their typical appearance, composition, and associated diseases.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Composition of Pappenheimer bodies (Red Blood Cell Inclusions) as background academic context rather than a clinical decision trigger.
Identifying Pappenheimer bodies on a peripheral blood smear is a crucial diagnostic clue for a nurse practitioner or physician, prompting further investigation into iron overload states or disorders of erythropoiesis.
The presence of these bodies in a patient's blood film can indicate poor or absent spleen function (asplenia), which has significant implications for the patient's risk of infection from encapsulated bacteria.
What if? If a patient's blood smear showed single, round, dark purple inclusions instead of small, irregular clusters, the primary consideration would shift from an iron disorder to conditions causing Howell-Jolly bodies, such as asplenia or severe hemolytic anemia.

How to Approach the Question

First, identify the core of the question, which is asking for the composition of a specific hematological finding: 'Pappenheimer bodies'.
This is a factual recall question common in pathology and hematology. Access your knowledge of red blood cell (RBC) inclusions.
Systematically review the common RBC inclusions and their compositions: Pappenheimer bodies (Iron), Howell-Jolly bodies (DNA), Basophilic stippling (RNA), and Heinz bodies (denatured Hemoglobin).
Match 'Pappenheimer bodies' with its known composition, which is iron.
Evaluate the other options to confirm they are incorrect. DNA corresponds to Howell-Jolly bodies, and RNA corresponds to basophilic stippling, making them effective distractors.

Concept Tested & Keywords

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