Hypogammaglobulinemia is a problem with the immune system that prevents it from making enough antibodies called immunoglobulins. Antibodies are proteins that help your body recognize and fight off foreign invaders like bacteria, viruses, and fungi...

Pierre Robin sequence is characterized by an unusually small lower jaw (micrognathia) and downward displacement of the tongue (glossoptosis). Some infants also have an abnormal opening in the roof of the mouth (cleft palate); both the soft and har...

Agammaglobulinemia is a group of inherited immune deficiencies characterized by a low concentration of antibodies in the blood due to the lack of particular lymphocytes in the blood and lymph. Antibodies are proteins (immunoglobulins, (IgM), (IgG)...