0203 The lung burden of Asbestos Fibres (AF) and Asbestos Bodies (AB) and the risk of mesothelioma (MM) for exposures ceased 30 years ago

Objectives To estimate the risk of MM according to AF and AB in the lungs. Method Freeze dried lung samples from 309 MM and 41 controls have been analysed for AF (Scanning Electronic Microscopy) and AB (Optical Microscopy) from subjects investigated and classified for probability and circumstances of asbestos exposure. Odds Ratios (OR) were obtained using logistic regression. Results 254 (82%) MMs have been classified as occupationally and 25 (8%) as non-occupationally exposed: Geometric Mean (GM) for AF burden was 1 950 000 and 608 000 ff/g dlt, respectively; and 39 300 and 3300 for AB. 75% and 58% of the AF respectively were amphibole. Controls reported a GM of 269 000 AF and 28 of AB g/dlt. For any increase of 100.000 ff/g dlt, we computed an OR of 1.7 (1.3–2.3) for amphibole, 1.1 (1.0–1.3) for chrysotile, among occupational MMs; an OR of 1.3 (1.0–1.7) and 1.1 (1.0–1.1) among non-occupational MMs. The 1997 Helsinki criteria for attribution to occupational exposure would have excluded more than 30% of MMs under study: here occupational exposures ceased on average 26 years before the disease, and therefore clearance and time since last exposure must be taken into account because are relevant determinants of the retained amount of fibres. Conclusions The risk of MM increases with the amount of retained amphibole, and to a lesser extent, of chrysotile fibres. Because occupational and non-occupation asbestos exposures have been to mixture of fibres, the lungs of MM patients are still loaded with amphibole AF

Potential benefits of pregnancy on endometriosis symptoms

Objective: To explore the potential benefits of pregnancy on endometriosis symptoms. This is a retrospective study that has been conducted at Academic department and referral center for endometriosis. Study Design: We included all conservative women who had a live birth after at least one surgery for endometriosis and who reported pre-pregnancy moderate to severe pelvic pain symptoms (at least one among dysmenorrhea, deep dyspareunia, non menstrual pelvic pain and dyschezia). Data were collected before pregnancy and two years after delivery. The main aim of the study was comparing endometriosis-related pain symptoms before and after pregnancy. Mental health and quality of life were also assessed to investigate the possible psychological benefits of pregnancy. Results: One-hundred thirty- one women were identified. Forty- nine women (37%, 95% CI: 29\u201347%) had a clinically relevant recurrence of symptoms requiring medical or surgical treatment. Two years after delivery, 84% of women (95% CI 77\u201390%) reported at least one moderate-severe pain symptom. A statistically significant improvement was observed for HADS and SF-12 scores but not for FSFI. Conclusion: Women with endometriosis experiencesymptoms relief during and immediately after pregnancy. However, as for hormonal medical therapy, symptoms rapidly recur in the vast majority of cases