Intestinal Behçet's disease complicated by myelodysplastic syndrome and secondary pulmonary alveolar proteinosis: a case report.

Secondary pulmonary proteinosis may accompany intestinal BD with MDS and several chromosomal abnormalities. Physicians should pay attention to lung complications, such as PAP, in patients with intestinal BD complicated by MDS. Genetic abnormalities may be associated with the development of such diseases.