Human parainfluenza virus giant cell pneumonia following cord blood transplant associated with pulmonary alveolar proteinosis.
Giant cell pneumonia secondary to human parainfluenza virus 3 has been reported only rarely in immunocompromised hosts. The few cases documented after bone marrow transplant have resulted in significant morbidity and mortality. To our knowledge, this entity has not been described following umbilical cord blood transplant. Pulmonary alveolar proteinosis, a rare condition that has been reported with increasing frequency in association with immunocompromise and infections, has not been documented in the setting of either umbilical cord blood transplant or human parainfluenza viral infection. We report what we believe is the first documented case of giant cell pneumonia caused by human parainfluenza virus 3 in an umbilical cord blood transplant recipient. To our knowledge, a unique associated feature of this case, a pulmonary alveolar proteinosis-like reaction, has not been reported previously in association with human parainfluenza virus pneumonia.
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