13–17 September 2009, Hamburg, Germany Oral communication abstracts Space was always very thin in atresia (with fistula or not), or very increased in tubular duplications. On the contrary to pouch sign, a normal tracheal aortic space is highly suspect of normal oesophagus. Conclusion: Pouch sign’s visualisation is pathognomonic of upper esophagus atresia, but is very difficult to obtain, and its absence doesn’t mean no atresia. On the contrary, the measure of the tracheo-aorta’s space is a much easier and reliable sign in normal and pathologic esophagus, and could be done in routine or in low risks as hydrops, especially when the stomach is poorly or not seen. A new CFEF’s study demonstrate its feasibility and reliability. OC12.06 Perinatal outcomes of fetal echogenic lung lesions: an Australian perspective F. D. Costa 1,5 , H. Karaganov 5 , H. Tran 1 , A. Sampson 2,5 , J. Crameri 4 , A. Fink 3,6 , R. Palma-Dias 1,5 1 Department of Perinatal Medicine, The Royal Women’s Hospital, Melbourne, VIC, Australia; 2 Imaging Department, Royal Women’s Hospital, Melbourne, VIC, Australia; 3 Department of Medical Imaging, Royal Children’s Hospital, Melbourne, VIC, Australia; 4 Department of Surgery, Royal Children’s Hospital, Melbourne, VIC, Australia; 5 Department of Obstetrics and Gynaecology, University of Melbourne, Melbourne, VIC, Australia; 6 Department of Radiology, University of Melbourne, Melbourne, VIC, Australia Objectives: The aim of this study is to describe antenatal and short term postnatal outcome measures of fetuses diagnosed with echogenic lung lesions at the mid trimester anomaly scan and who were subsequently managed in a multidisciplinary fetal medicine unit at a tertiary Australian centre. Methods: All patients with an antenatal diagnosis of an echogenic lung lesion seen at the Royal Women’s Hospital between January 1995 and December 2008 were identified through the Fetal Management Unit database. Medical records were reviewed and the following information collected: maternal age, gestational age at the time of initial diagnosis, size and location of the lesion, antenatal evolution of the lesion, presence of mass effect, development of hydrops, gestational age at birth, mode of delivery, infant sex, birth weight and initial postnatal follow-up, including postnatal imaging findings by chest X-ray, computerized tomography. All antenatal and postnatal imaging were reviewed by a fetal medicine specialist and a paediatric radiologist and were reclassified for the purpose of the study based on: 1) presence/absence and size of cysts; 2) evidence of systemic arterial blood supply on colour Doppler. Results: Sixty-seven women with singleton pregnancies with the antenatal diagnosis of fetal echogenic lung lesions were identified and included in the study. The results are presented as a correlation between the proposed imaging classification and the clinical characteristics mentioned above. Conclusions: Fetal echogenic lung lesions have an overall good prognosis. Serial ultrasound scanning is recommended to monitor the size of the lesion and to detect possible development of fetal hydrops, which is especially associated with a poor outcome. Post natal follow up is warranted in all cases, although our series support the trend towards less surgical interventions being necessary. OC12.07 Hyperechogenic fetal bowel: prenatal findings and outcome in 208 cases L. Masini 1 , S. Ciotti 1 , L. Casarella 1 , M. De Santis 1 , E. Cesari 1 , C. Pintus 2 , C. Manzoni 2 , A. Caruso 1 1 Obstetetrics & Gynaecology, Universit ` a Cattolica del Sacro Cuore, Roma, Italy; 2 Pediatric Surgery, Universit ` a Cattolica del Sacro Cuore, Roma, Italy Objective: To evaluate prenatal findings and postnatal outcomes in fetuses with prenatal ultrasonographic diagnosis of hyperechogenic bowel. Methods: In our Center for Prenatal Diagnosis, between February 1980 and June 2008, 4680 fetuses with congenital anomalies were observed; in 208 cases (4.4%) an hyperechogenic bowel, isolated or associated with anomalies or markers, was found. Detailed ultrasonography for anomalies, karyotyping, screening for viral infections and for cystic fibrosis were offered. Medical history, obstetric records and outcome details were examined. For the cases delivered elsewhere, a telephonic interview was performed. Results: Hyperechogenic bowel was detected mainly in II trimester (163 cases, 78.4%); it was isolated in 101 cases (48.6%), associated with markers in 36 cases (17.3%) and with structural anomalies in 71 cases (34.1%). The bowel appears only hyperechoic in 168 cases (80.8%), hyperechoic and dilated in 32 cases (15.4%), hyperechoic and associated with ascites/calcifications in 8 cases. Outcome is known in 186 cases: spontaneous abortion occurred in 11 cases (5.3%), pregnancy terminations in 35 (16.8%), intrauterine death in 4 (1.9%), preterm delivery in 48 (34.3%), term delivery in 92 (65.7%); postnatal mortality happens in 16 babies (11.8%). Chromosome anomalies were present in 12.9% (24 cases), intrauterine growth retardation in 26.9% (50 cases), Cystic Fibrosis in 4.3% (8 cases), congenital CMV in 2.2% (4 cases), intestinal malformations in 8.6% (16 cases). Conclusions: Our results show a good prognosis in fetuses with iso- lated hyperechogenic bowel (survival 81.4%), whereas associated anomalies lead to perinatal mortality (survival 52.1%). Chro- mosome anomalies, congenital infections and growth restriction were observed especially in cases with only hyperechogenic bowel, whereas Cystic Fibrosis and intestinal obstructions were detected mainly in cases with associated ascites or dilated bowel loops or calcifications. OC13: THE ASSESSMENT OF ENDOMETRIOSIS AND ADENOMYOSIS OC13.01 The value of transvaginal ultrasound in assessing the severity of pelvic endometriosis T. K. Holland , J. Yazbek, W. Hoo, D. Mavrelos, D. Jurkovic EPAGAU, Kings College Hospital, London, United Kingdom Objectives: To assess if transvaginal ultrasound examination can accurately predict the severity of pelvic endometriosis. This would facilitate the triaging of patients with severe disease to specialist tertiary referral centres where their surgical care can be optimised. Methods: Women were recruited consecutively to join this prospective observational study from July 2006 to December 2008. Women with pelvic pain of greater than six months duration, booked for laparoscopy were examined pre-operatively using transvaginal ultrasound (TVS). The severity of endometriosis as assessed by TVS was compared with laparoscopy findings recorded using the revised American Fertility Association system. Results: 201 women had pre-operative TVS and laparoscopies. Of these 62/201 (30.8%, 95% CI 23.7–36.3) had no endometriosis found at laparoscopy, 33/201 (16.4%, 95% CI 10.9–21.1) minimal disease, 31/201 (15.4%, 95% CI 10.1–19.9) mild disease, 27/201 (13.4%, 95% CI 8.35 – 17.65) moderate disease and 48/201 (23.9%, Ultrasound in Obstetrics & Gynecology 2009; 34 (Suppl. 1): 1–61 23