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Hemangiopericytomas are rare soft-tissue neoplastic lesions that can arise in any part ofthe body. They are mesenchymal tumors that accountfor 3 to 5% ofall soft-tissue sarcomas and 1% ofall vascular tumors. They originate in extravascular cells (pericytes). Some 15 to 30% ofall hemangiopericytomas occur in the head and neck; ofthese, approximately 5% occur in the sinonasal area. Wedescrib e our brief retrospective review of 7 histologically proven cases ofsinonasal hetnangiop ericytoma, and we discuss the imaging characteristics and clinical and pathologic findin gs in these patients.

Inflammatory pseudotumor" is a broad descriptive term used to describe a localized collection of inflammatory and fibroblastic cells. It is an uncommon lesion that can mimic a tumor when it is located intraluminally in the trachea or bronchi. Because an inflammatorypseudo tumor has an abundance of polyclonal plasma cells, its etiology (postinflammatory vs immunologic) is still being debated. We report a new case ofinflammatorypseudotumor that arose in the trachea of a 20-year-old man. We also review the histologic and clinical characteristics of this lesion.

Cite this article as: Şen P, Demirdal T. Current Approaches to Surgical Antimicrobial Prophylaxis and Use of Antimicrobial Prophylaxis in Urological Procedures. J Urol Surg 2017;4:159-166. Surgical site infections (SSIs) are the most common and preventable type of healthcare-associated infections in low and middle-income countries and affect one-third of patients that have undergone surgical procedures. As the number of surgical procedures performed increases, the prevention of SSIs becomes more important. It is considered that, it is possible to prevent approximately half of all SSI cases. However, due to the contribution of many factors to the development of SSIs, it may be difficult to effectively prevent these infections, and there is a need to take various preventive measures before, during and after surgery. This review presents the current recommendations on the use of prophylactic antimicrobial agents for the prevention of SSIs and recommendations about antimicrobial prophylaxis in urological procedures. Keywords: Surgical site infections, antibiotics, prophylaxisCerrahi alan enfeksiyonları (CAE) en sık görülen sağlık bakımıyla ilişkili enfeksiyonlar olup önlenebilir olması nedeniyle önem arz etmektedir. CAE önlenmesi için uygulama çeşitleri gittikçe artmakta ve buna bağlı olarak kanıta dayalı müdahale talepleri gün geçtikçe artmaktadır. Bu nedenle önceden yayınlanan kılavuzlara ek güncelleme ihtiyacı doğmaktadır. Yeni ve güncellenmiş öneriler sadece sağlık mensupları için değil, aynı zamanda profesyonel dernek ve kuruluşlar için de bir kaynak olabilme özelliğini taşımaktadır. Bu derlemede CAE önlemeye yönelik profilaktik antimikrobiyal ajan kullanımıyla ilgili güncel önerileri sunmak amaçlanmıştır.

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