en Pediatric Hematology & Oncology Pediatric Hematology & Oncology گزارش مورد Case report <div style="text-align: justify;"><span style="font-family:Times New Roman;"><span style="font-size:14px;"><span style="line-height:2;"><span new="" roman="" times=""><strong>Background:</strong> Cystic fibrosis (CF) is an inheriting disorder that has a strong impact on the pulmonary systems of individuals, as a result, hypoxia might be presented among patients who have CF. In addition, hypoxia is a pathological condition that might be present among patients with sickle cell trait (SCT). However, the simultaneous presentation of both SCT and CF in a patient is rare.<br> <strong>Case presentation: </strong>A 7-year-old boy came to the hospital with a chief complaint of cyanosis and cough. In his physical examination, he has low SpO2. His fiber-optic bronchoscopy depicted purulent secretion in the main bronchus. As well, his sweet chloride test was above 80 mmol/L. Thus, by the impression of CF exacerbation, he got HARD treatment and antibiotics. Additionally, during hospitalization, SCT as another impression was diagnosed for him.<br> <strong>Conclusion: </strong>Although the co-existence of CF and SCT is rare among patients. The physicians must consider both CF and SCT when a child comes to the emergency room with hypoxia.</span></span></span></span></div> Cystic fibrosis, Sickle cell trait, Hypoxia 8 13 http://ijbc.ir/browse.php?a_code=A-10-1196-1&slc_lang=en&sid=1 Seyed Ahmad Tabatabaii ahmadtabatabaii@gmail.com 100319475328460011275 100319475328460011275 No Department of Pediatric Pulmonology, Mofid Pediatrics Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran Neda Entezari Farahabadi neda93farahabadi@gmail.com 100319475328460011276 100319475328460011276 Yes Department of Pediatric Pulmonology, Mofid Pediatrics Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran