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Síndrome por aglutininas frías secundario a mononucleosis infecciosa: reporte de un caso / Cold agglutinin syndrome associated with infectious mononucleosis: A case report

Diego Alejandro Garzón-Recalde, Elizabeth Rentería-Castillo, Juan Carlos Anda-Garay

Resumen


Resumen

Introducción: el síndrome por aglutininas frías (SAF) es una anemia hemolítica mediada por anticuerpos principalmente de tipo IgM, cuya máxima actividad se da a 4 °C. Se presenta en el contexto de enfermedades infecciosas, autoinmunes o neoplásicas por la formación de anticuerpos que tienen reacción cruzada contra antígenos eritrocitarios, particularmente del sistema I. En este trabajo presentamos un caso de SAF asociado a reactivación del virus de Epstein-Barr (VEB) en un paciente con primoinfección por el virus de la inmunodeficiencia humana (VIH).

Caso clínico: hombre de 22 años, sin antecedentes patológicos, hospitalizado por síndrome mononucleósico y anémico. Presentó hemoglobina de 3.7 g/dL y elevación de lactato deshidrogenasa. En el frotis de sangre periférica se observó esferocitosis, policromasia y eritrocitos nucleados. Se confirmó infección por VEB con serología y carga viral, así como infección por VIH seronegativa, con carga viral positiva. La prueba de antiglobulina directa monoespecífica a C3d fue positiva y el rastreo de anticuerpos irregulares demostró un anticuerpo anti-I. El paciente recibió soporte transfusional y tratamiento conservador, con remisión del cuadro a las 2 semanas de su ingreso.

Conclusiones: el SAF es una complicación poco frecuente de la mononucleosis infecciosa, potencialmente mortal, la cual debe ser considerada ante hallazgos sugestivos de hemólisis con la finalidad de iniciar medidas de soporte de forma oportuna.

 

Abstract

Background: Cold agglutinin syndrome (CAS) is a hemolytic anemia mediated by antibodies, mainly IgM, whose maximum activity occurs at 4 °C. It happens secondary to infectious, autoimmune or neoplastic diseases, due to the formation of antibodies that cross-react against erythrocyte antigens, particularly of the I system. Here, we describe a case of CAS associated to Epstein-Barr virus (EBV) reactivation in a patient with primary human immunodeficiency virus (HIV) infection.

Clinical case: 22-year old man with no medical history, hospitalized due to mononucleosis and anemic syndrome. Hemoglobin of 3.7 g/dL and elevation of lactate dehydrogenase were documented. In the peripheral blood smear it was observed spherocytosis, polychromasia and nucleated erythrocytes. EBV infection was confirmed with serology and viral load, as well as seronegative HIV infection with positive viral load. The C3d monospecific direct antiglobulin test was positive and an irregular antibody screening revealed the presence of an anti-I antibody. The patient received transfusion support and conservative treatment, with remission of the symptoms 2 weeks after admission.

Conclusions: Cold agglutinin syndrome is a rare, potentially fatal complication of infectious mononucleosis, which should be considered in the face of findings suggestive of hemolysis in order to initiate support measures in a timely manner.


Palabras clave


Anemia hemolítica autoinmune; enfermedad por crioaglutininas; infecciones por virus de Epstein-Barr; mononucleosis infecciosa; prueba de Coombs / Autoimmune Hemolytic Anemia Cold Agglutinin Disease Epstein-Barr Virus Infections Infectious Mononucleosis

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Referencias


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