Hyper IgM Syndrome with low IgM and thrombocytosis: an unusual case of immunodeficiency.

Hyper-IgM Immunodeficiency with Enamel Defects: a Case Report

Background: Hyper-Immunoglobulin M (IgM) syndrome (HIGM) is a rare primary immunodeficiency in which defective B-cell isotype switching results in a phenotype characterized by elevated or normal serum IgM levels and low levels of other Ig classes, leading to an increased susceptibility to infection, neutropenia, autoimmune disorders, and malignancies. In this disease, a mutation occurs in the C...

X-linked hyper-IgM syndrome with eosinophilia in a male child: A case report

The hyper-IgM syndromes (HIGMs) are a group of primary immune deficiency diseases characterized by a normal or elevated serum level of IgM and low or absent serum levels of IgG, IgA and IgE. Here, we report a case of X-linked HIGM with a new CD40L gene mutation presenting with eosinophilia. The patient experienced recurrent pneumonia and acute respiratory distress syndrome (ARDS) from 4 months ...

Morbidity and Mortality of Iranian Patients with Hyper IgM Syndrome: a Clinical Analysis

Background: Defects in B cell class switch recombination (CSR) are a heterogeneous and yet very uncommon group of disorders which all have a genetic basis uniformly leading to hyper IgM (HIgM) syndrome. Due to the rare frequency of these conditions, a very small number of case series have been conducted on the affected patients. Objective: To shed some light on the morbidity and mortality regar...

Non-functional IgG transcripts in a case of hyper- IgM syndrome similar to type 4

Biased immunoglobulin G (IgG) subclass production in a case of hyper-IgM syndrome.

Hyper-immunoglobulin M (IgM) syndrome (HIGM) is a rare heterogeneous primary immune deficiency. We describe a patient with HIGM characterized by skewed production of serum IgG subclasses and normal somatic hypermutation. This case may represent a subgroup of HIGM type 4 that is characterized by a biased switching to the V-region proximal constant regions.