PMID- 31494587 OWN - NLM STAT- MEDLINE DCOM- 20200210 LR - 20210907 IS - 1757-790X (Electronic) IS - 1757-790X (Linking) VI - 12 IP - 9 DP - 2019 Sep 6 TI - Interstitial pneumonia with autoimmune features and platypnea-orthopnea syndrome. LID - 10.1136/bcr-2019-230948 [doi] LID - e230948 AB - Interstitial pneumonia with autoimmune features (IPAF) is a recently proposed terminology for interstitial lung disease (ILD) with evidence of autoimmunity that does not meet the criteria for a defined connective tissue disease (CTD). Although ILD is well recognised in patients with established CTD, it is rarely the sole presenting feature of CTD. We report a case of 22-year-old male patient, who presented with progressive shortness of breath for 2 months and had features suggestive of platypnea-orthodeoxia syndrome (POS). Imaging revealed ILD with usual interstitial pneumonia pattern. Patient had features of autoimmune disorder but did not fulfil the criteria for any CTD and hence was labelled as IPAF. His POS was attributed predominantly to the lower lobe disease. The patient responded well to immunosuppressive treatment. A systematic review of literature of all cases with POS due to pulmonary parenchymal involvement has also been done. CI - (c) BMJ Publishing Group Limited 2019. No commercial re-use. See rights and permissions. Published by BMJ. FAU - Mathew, Uthara AU - Mathew U AD - Medicine, All India Institute of Medical Sciences, New Delhi, India. FAU - Mittal, Ankit AU - Mittal A AD - Medicine, All India Institute of Medical Sciences, New Delhi, India. FAU - Vyas, Surabhi AU - Vyas S AD - Radiology, All India Institute of Medical Sciences, New Delhi, India. FAU - Ray, Animesh AU - Ray A AUID- ORCID: 0000-0001-7498-9112 AD - Medicine, All India Institute of Medical Sciences, New Delhi, India. LA - eng PT - Case Reports PT - Journal Article DEP - 20190906 PL - England TA - BMJ Case Rep JT - BMJ case reports JID - 101526291 RN - 0 (Immunosuppressive Agents) SB - IM MH - Autoimmune Diseases/*diagnosis/drug therapy/immunology/physiopathology MH - Dyspnea/immunology MH - Humans MH - Idiopathic Pulmonary Fibrosis/*diagnosis/drug therapy/immunology/physiopathology MH - Immunosuppressive Agents/*therapeutic use MH - Male MH - Syndrome MH - Treatment Outcome MH - Young Adult PMC - PMC6731928 OTO - NOTNLM OT - connective tissue disease OT - interstitial lung disease OT - statistics and research methods COIS- Competing interests: None declared. EDAT- 2019/09/09 06:00 MHDA- 2020/02/11 06:00 PMCR- 2021/09/06 CRDT- 2019/09/09 06:00 PHST- 2019/09/09 06:00 [entrez] PHST- 2019/09/09 06:00 [pubmed] PHST- 2020/02/11 06:00 [medline] PHST- 2021/09/06 00:00 [pmc-release] AID - 12/9/e230948 [pii] AID - bcr-2019-230948 [pii] AID - 10.1136/bcr-2019-230948 [doi] PST - epublish SO - BMJ Case Rep. 2019 Sep 6;12(9):e230948. doi: 10.1136/bcr-2019-230948.