• Sanem Guler Cimen, Görkem Özenç, Ahmet Emin Doğan, Efe Yetişgin, Sertaç Çimen, and Ünsal Han.
• Department of General Surgery, University of Health Sciences, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara-Türkiye.
• Ulus Travma Acil Cer. 2022 Nov 1; 28 (11): 165016541650-1654.

AbstractAcute abdomen is a serious condition frequently encountered in the emergency departments (ED). There are various etiologies causing acute abdomen, most common being acute appendicitis; however, there are rare causes of acute abdomen as well and one should keep them in mind while handling a patient with unusual clinical features. We herein present a 26-year-old male, with no past medical or surgical history, presenting with acute abdominal pain and distension to the ED. He was found to have a large vascular retroperitoneal mass on computed tomography which had invaded and perforated the duodenum thus causing the acute presentation. Repair of the duodenal perforation and sampling of the mass were performed in terms of surgical management. Pathology results revealed the mass originating from a burned out testis yolk sac tumor with embryonal carcinoma component. Although the original tumor had regressed at the testis, its metastasis at the retroperitoneal area had caused the clinical condition. This entity is described as the retroperitoneal metastasis of a burned-out testicular tumor. Few cases presenting with gastrointestinal bleeding secondary to invasion of the retroperitoneal metastasis have been reported. However, this is the first case in the literature presenting with duodenal perforation and acute abdomen. Sampling of the retroperitoneal tumor for histopathological diagnosis during the immediate surgical intervention facilitates the diagnostic management in these cases. Although scrotal examination combined with testis tumor marker assessments is essential for optimal patient management, the possibility of a burned-out testicular tumor with normal scrotal examination should always be kept in mind.

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