RT Journal Article SR Electronic T1 Well differentiated fetal adenocarcinoma of the lung in a 29 year old woman JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 478 OP 479 DO 10.1136/jcp.56.6.478 VO 56 IS 6 A1 K M Sheehan A1 J Curran A1 E W Kay A1 P Broe A1 A Grace YR 2003 UL http://jcp.bmj.com/content/56/6/478.abstract AB This report describes a case of well differentiated fetal adenocarcinoma of the lung in a 29 year old female smoker. The histological pattern and immunohistochemical profile were consistent with well differentiated fetal adenocarcinoma and the patient made an uneventful postoperative recovery with no recurrence after 18 months. This neoplasm is a rare lung tumour that is composed of glycogen rich neoplastic glands and tubules that resembles fetal lung at 10 to 15 weeks of gestation. It is important to identify this rare variant of adenocarcinoma because it is a low grade malignancy with low associated mortality.