TY - JOUR T1 - Prolidase deficiency diagnosed by whole exome sequencing in a child with pulmonary capillaritis JF - ERJ Open Research JO - erjor DO - 10.1183/23120541.00205-2018 VL - 5 IS - 2 SP - 00205-2018 AU - Jonathan H. Rayment AU - Rebekah Jobling AU - Sarah Bowdin AU - Ernest Cutz AU - Sharon D. Dell Y1 - 2019/04/01 UR - http://openres.ersjournals.com/content/5/2/00205-2018.abstract N2 - Diffuse alveolar haemorrhage (DAH) is rare in the paediatric population and the biological mechanisms remain poorly understood [1]. We retrospectively studied 12 children at our centre, identified from our pathology database, with idiopathic DAH between 2005–2017 who had undergone lung biopsy (SickKids ethics approval number: 1000029185). Two children in this cohort were offered clinical whole exome sequencing (WES) as an investigational diagnostic procedure based on a family history of lung disease. Both children who underwent WES, including the one presented here and one who we had previously reported [2], had single gene mutations that explained the pathogenesis of their pulmonary haemorrhage.The case of a young boy with pulmonary haemorrhage who was ultimately diagnosed on whole exome sequencing with a rare condition called prolidase deficiency. This case demonstrates the utility of modern genomic testing in paediatric rare lung disease. http://ow.ly/rDGz30o8pcd ER -