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Background Common primary bone tumors include osteosarcomas (OSC) and Ewing sarcomas (EWS). The skull is a rare site, and literature about their treatment and survival is scarce. Using the Surveillance, Epidemiology, and End Results (SEER) database, this study aims to assess the treatment and survival of skull OSC and skull EWS, as well as predictors for survival. Methods Skull OSC and EWS cases were obtained from the SEER database. Patient and tumor characteristics, treatment modalities, and survival were extracted. Overall survival (OS) was assessed using multivariable Cox proportional hazard regression stratified by tumor histology. Kaplan-Meier curves were constructed for OS comparing OSC and EWS, as well as histological subtypes in OSC. Results A total of 321 skull OSC and 80 skull EWS patients were registered from 1973 to 2013. EWS was more common in younger patients ( p < 0.001). Resection was the predominant treatment strategy (80.1%), frequently in combination with adjuvant radiotherapy (30.4%). The 5-year survival rate varied significantly between OSC and EWS (51.0% versus 68.5%, p = 0.02). Kaplan-Meier curves show that EWS had a significantly better survival compared to OSC. Comparing histological subtypes of skull OSC, chondroblastic OSC had the best OS, Paget OSC the worst. Older age, tumor advancement, no surgical treatment, and the use of radiotherapy were identified as independent predictors of decreased OS in skull OSC. Conclusion Overall prognosis is better for EWS compared to OSC. Chondroblastic OSC have the best overall survival, while OSC associated with Paget’s disease of the bone has the poorest overall survival.

Sex hormones have been proposed as a possible risk factor for the development and growth of meningiomas. Hormonal therapy plays a fundamental role in the treatment of male-to-female transgenders and needs to be continued after sex reassignment surgery. Usually, this treatment leads to no adverse events; however, its impact on hormone-related tumours such as meningiomas has not yet been investigated thoroughly. We searched our cohort of 2810 male-to-female transgender persons, who have been treated between 1975 and 2010, for patients with meningiomas. Additionally, we conducted a literature search in PubMed and EMBASE. We found three patients who developed a meningioma in male-to-female transgenders in addition to five other who have been described in the literature. These findings support the role of female sex hormones in the development and growth of meningiomas. This might be an underrepresentation, because there is no standard protocol for screening for meningiomas in this population and meningiomas can remain asymptomatic for several years. We observed regression of multiple meningiomas in one of these three cases after discontinuation of hormonal treatment. The decision to stop or continue cross-sex hormone therapy in these particular patients should be carefully reconsidered individually.

The severity of initial neurological injury seems to play an important role in the urgency of surgical timing for tSCI. A substantial number of patients with complete tSCI are not preferably treated within the recommended surgical timeframe, while patients with incomplete tSCI are preferably operated far more urgent than recommended in the current guidelines. These slides can be retrieved under Electronic Supplementary Material.