PT - JOURNAL ARTICLE AU - Numaera Sabir AU - Elizabeth A Jones AU - Beena Padmakumar TI - Trimethylaminuria AID - 10.1136/bcr-2015-213742 DP - 2016 Apr 26 TA - BMJ Case Reports PG - bcr2015213742 VI - 2016 4099 - http://casereports.bmj.com/content/2016/bcr-2015-213742.short 4100 - http://casereports.bmj.com/content/2016/bcr-2015-213742.full AB - We report the case of a 9-year-old boy referred to secondary care with an unusual presentation of a fishy odour to his hands, feet, saliva and urine. Laboratory investigations including urine analysis and genetic testing confirmed the diagnosis of trimethylaminuria. The patient was referred to a geneticist and dietician, and consequently treated with dietary modification. He now has an arguably much improved quality of life.