Related Experiment Video
Updated: Feb 19, 2026
Use of Hematopoietic Stem Cell Transplantation to Assess the Origin of Myelodysplastic Syndrome
Published on: October 3, 2018
Clinical features of secondary pulmonary alveolar proteinosis associated with myelodysplastic syndrome: Two case
Yin Liu1, Lu Lu Chen, Yu Ying Qiu
1Department of Respiratory, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.
Rationale:
Pulmonary alveolar proteinosis (PAP) is a rare lung disorder characterized by the abnormal accumulation of alveolar surfactant protein in alveolar spaces. Secondary PAP can result from myelodysplastic syndrome (MDS).
Patient Concerns:
But most reports described a single case; here we reported 2 cases of PAP secondary to MDS. One case developed secondary PAP at the same time as MDS, and the other developed during the course of MDS.
Diagnoses:
The diagnosis of PAP was made by bronchoalveolar lavage and based on the identification of periodic acid-Schiff-positive proteinaceous material. Chest high resolution CT (HRCT) scans showed variable distribution of ground glass opacities, but crazy-paving appearance was not seen in our 2 cases.
Interventions:
Because the patients' general conditions were poor, whole lung lavage was not used in the 2 cases.
Outcomes:
And the 2 cases' prognoses were poor.
Lessons:
In conclusion, pulmonary physicians should suspect the possibility of secondary PAP when they encounter unexplained pulmonary infiltrates with some hematologic or infectious disease that shows diffuse bilateral GGO on an HRCT scan.
