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PURPOSE: To compare obstetric outcomes of induced preterm twin births (under 32 weeks gestation) with those spontaneously conceived. METHODS: Prospective study of twin pregnancies (25 induced and 157 spontaneously conceived) developed over a period of 16 years in a tertiary obstetric center. Demographic factors, obstetric complications, gestational age at delivery, mode of delivery, birth weight and immediate newborn outcome were compared. RESULTS: The analysis of obstetrical complications concerning urinary or other infections, hypertensive disorders of pregnancy, gestational diabetes, fetal malformations, intrauterine fetal death, intrauterine growth restriction and intrauterine discordant growth reveal no significant statistical differences between the two groups. First trimester bleeding was higher in the induced group (24 versus 8.3%, p=0.029). The cesarean delivery rate was 52.2% in spontaneous gestations and 64% in induced gestations. Gestational age at delivery, birth weight, Apgar scores at first and fifth minutes, admissions to Neonatal Intensive Care Unit and puerperal complications show no statistically significant differences between the two groups. These results were independent of chorionicity and induction method. CONCLUSION: The mode of conception did not influence obstetric and neonatal outcomes. Although induced pregnancies have higher risk of first trimester bleeding, significant differences were not observed regarding other obstetric and puerperal complications and neonatal results. ResumoOBJETIVO: Comparar os resultados obstétricos de gestações gemelares induzidas com as concebidas espontaneamente, em partos ocorridos antes da 32ª semana de idade gestacional. MÉTODOS: Estudo prospectivo de gestações gemelares (25 induzidas e 157 concebidas espontaneamente) desenvolvido durante um período de 16 anos num centro terciário de Obstetrícia. Foram comparados fatores demográficos, complicações obstétricas, idade gestacional no parto, tipo de parto, peso ao nascer e o outcome imediato do recém-nascido. RESULTADOS: A análise das seguintes complicações obstétricas: infecções urinárias ou outras, distúrbios hipertensivos da gravidez, diabetes gestacional, malformações fetais, morte fetal intrauterina, restrição de crescimento intrauterino e crescimento intrauterino discordante não revelou diferenças estatísticas significativas entre os dois grupos. No grupo das gestações induzidas, observou-se maior taxa de metrorragias do 1º trimestre (24 versus 8,3%, p=0,029). A taxa de cesariana foi de 52,2% nas gestações espontâneas e 64% nas gestações induzidas. Idade gestacional no parto, peso ao nascer, índice de Apgar no primeiro e quinto minutos, internamento em unidade de cuidados intensivos neonatal e complicações puerperais não apresentam diferenças estatisticamente significantes entre os dois grupos. Esses resultados foram independentes do tipo de placentação e método de indução. CONCLUSÃO: O modo de concepção não influenciou os resultados obstétricos e neonatais. Embora as gestações induzidas ten...

Although mature cystic teratoma (MCT) is benign, malignant transformation (MT) occurs in ∼ 1% to 2% of all cases, and usually consists of squamous cell carcinoma (SCC), which accounts for ∼ 80% of the cases. Spindle-cell (sarcomatoid) carcinoma (SCSC) is an uncommon type of SCC, comprising up to 3% of all cases. The lack of characteristic symptoms and specific imaging findings may lead to preoperative misdiagnosis. Moreover, the clinicopathologic characteristics, the treatment, the prognostic factors and the mechanism of MT have not yet been well understood due to the rarity of such tumors, especially in women of reproductive age. The authors present a case of a 34-year-old patient with 14 weeks of gestation who was diagnosed with an adnexal mass suggestive of ovarian teratoma. A laparoscopy salpingo-oophorectomy was performed after 6 months of delivery, and the histological exam revealed a sarcomatoid SCC in the MCT.