Compound Heterozygosity for Hb Port Phillip and the –α 3.7 Deletion Leads to Persistent Hypoxemia in a Chinese Pediatric Family

deletion with hypoxemia in a Chinese family, thus broadening the phenotype-genotype spectrum of hemoglobinopathies. The unexpected low oxygen saturation may result from a hemoglobin variant in the setting of mild microcytic anemia; hemoglobin electrophoresis and genetic testing are crucial for accurate diagnosis and can prevent unnecessary interventions.