PMID- 36532701 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20221222 IS - 1687-9627 (Print) IS - 1687-9635 (Electronic) VI - 2022 DP - 2022 TI - Basilar Predominant Emphysema: Thinking beyond Alpha-1-Antitrypsin Deficiency. PG - 9840085 LID - 10.1155/2022/9840085 [doi] LID - 9840085 AB - Basilar predominant emphysema, or disproportionate emphysematous involvement of the lung bases compared to the apices, is an uncommon radiographic pattern of emphysema traditionally associated with alpha-1-antitrypsin deficiency (AATD). We present a case of a 59-year-old female with 41 pack-year tobacco use, Stage IV COPD with supplemental oxygen, and bibasilar predominant emphysema who successfully underwent bronchoscopic lung volume reduction. She presented with recurrent hospitalizations for frequent exacerbations. After lung reduction, the patient displayed improvement in functional status without hospitalizations at the 15-month follow-up. Careful history taking is essential for any patients diagnosed with lower lobe emphysema to elucidate the underlying etiology. This case challenges the notion that basilar emphysema is sensitive or specific for AATD and emphasizes that this pattern of emphysema has a broad differential diagnosis and alternative etiologies should be considered. Our patient was ultimately diagnosed with smoking-related emphysema, with atypical bibasilar involvement. Furthermore, basilar predominant emphysema should be considered a separate entity from its apical predominant counterpart. CI - Copyright (c) 2022 Ho-Man Yeung and Lauren Gaffaney. FAU - Yeung, Ho-Man AU - Yeung HM AUID- ORCID: 0000-0002-7188-9738 AD - Department of Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA. FAU - Gaffaney, Lauren AU - Gaffaney L AD - Department of Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA. LA - eng PT - Case Reports DEP - 20221209 PL - United States TA - Case Rep Med JT - Case reports in medicine JID - 101512910 PMC - PMC9757930 COIS- The authors declare that they have no conflicts of interest. EDAT- 2022/12/20 06:00 MHDA- 2022/12/20 06:01 PMCR- 2022/12/09 CRDT- 2022/12/19 04:19 PHST- 2022/10/02 00:00 [received] PHST- 2022/11/28 00:00 [revised] PHST- 2022/11/30 00:00 [accepted] PHST- 2022/12/19 04:19 [entrez] PHST- 2022/12/20 06:00 [pubmed] PHST- 2022/12/20 06:01 [medline] PHST- 2022/12/09 00:00 [pmc-release] AID - 10.1155/2022/9840085 [doi] PST - epublish SO - Case Rep Med. 2022 Dec 9;2022:9840085. doi: 10.1155/2022/9840085. eCollection 2022.