Evidence map›Paper›PMID 41013644›Full record

ReviewJournal of medical case reports2025

Unexpected occurrence of anti-B antibodies in a patient with A2B blood group: a case report and review of literature.

Fatemeh Kalhori, Masoumeh Babakhani, Mohammad Sayyadi

Abstract readCase ReportsReview
In one paragraph

Review in Journal of medical case reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Fatemeh KalhoriStudent Research Committee, Arak University of Medical Sciences, Arak, Iran.
Masoumeh BabakhaniStudent Research Committee, Arak University of Medical Sciences, Arak, Iran.
Mohammad SayyadiDepartment of Medical Laboratory Sciences, School of Allied Medical Sciences, Arak University of Medical Sciences, Arak, Iran. m.sayyadi88@gmail.com.ORCID http://orcid.org/0000-0003-2927-9669

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe ABO blood group system categorizes human blood according to the inherited characteristics of erythrocytes, which are defined by the presence or absence of antigens A and B located on the surface of red blood cells. In the absence of these antigens, the body produces natural antibodies. CASE PRESENTATION: In this case report, we present a 42-year-old man of Iranian (Persian) ethnicity who was a blood donor at the Arak transfusion center. Forward and reverse typing showed a discrepancy, with AB as the cell type and O blood group as the back type results.

conclusionThis report shares our experience of unexpected anti-A and anti-B antibodies presence in AB blood group. Finally, it was discovered that the patient has an A2B blood group with clinically insignificant anti-A1 antibodies. The reason behind the occurrence of B antibodies in this case is still unknown but can be considered an acquired B phenomenon. To the best of our knowledge, this is the first report of anti-B antibodies in a patient with an A2B blood type in Iran.

Indexed as

ABO Blood-Group SystemIsoantibodiesAdultBlood Grouping and CrossmatchingHumansIranMaleABO Blood-Group SystemIsoantibodiesABO discrepanciesBack typingForward typingImmunohematology

Identifiers

PMID41013644
PMCPMC12465467

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.