Congenital Prepubic Sinus with Remnant Tissue Mimics Corpus Spongiosum: A Rare Case

Abstract

A congenital prepubic sinus is a tract that originates in the skin and overlays the base of the penis; however, its embryologic basis is still debated. We herein present a case involving a 3-year-old boy who was admitted for examination of overlying tissue located a few centimeters distal to the dorsal base of the penis. Examination revealed a tiny sinus in the prepubic area, and 3 cm of tissue was attached to the sinus. Pathologic examination showed that the tissue was lined with squamous epithelium and continued along the sinus tract, which was lined with urothelial epithelium. According to Stephens' classification, the sinus appeared to be a variant of type 2 dorsal urethral duplication, and the remnant tissue mimicked the corpus spongiosum of the penis.

Keywords

congenital prepubic sinus - corpus spongiosum - dorsal urethral duplication

• References

• 1 Huang C-C, Wu W-H, Chai C-Y, Wu TC, Chuang JH. Congenital prepubic sinus: a variant of dorsal urethral duplication suggested by immunohistochemical analysis. J Urol 2001; 166 (5) 1876-1879
• 2 Kim HY, Shin OR, Jang ED , et al. Congenital prepubic sinus: a variant of urethral duplication. Korean J Urol 2007; 48: 881-884
• 3 Al-Wattar KM. Congenital prepubic sinus: an epispadiac variant of urethral duplication: case report and review of literature. J Pediatr Surg 2003; 38 (4) E10-E12
• 4 Balster S, Bettendorf O, Brinkmann OA, Hertle L. Congenital prepubic sinus: etiology and therapy [in German]. Aktuelle Urol 2003; 34 (7) 484-487
• 5 Tsukamoto K, Yamataka A, Kuga T, Yanai T, Watanabe T, Miyano T. Congenital prepubic sinus: is it a residual cloacal membrane and umbilicophallic groove?. Pediatr Surg Int 2004; 20 (1) 47-50
• 6 Soares-Oliveira M, Juliá V, Aparicio LG, Morales L. Congenital prepubic sinus. J Pediatr Surg 2002; 37 (8) 1225-1227
• 7 Rozanski TA, Kiesling Jr VJ, Tank ES. Congenital prepubic sinus. J Pediatr Surg 1990; 25 (12) 1301
• 8 Nasir AA, Abdur-Rahman LO, Olaoye I, Oyinloye AO, Bamigbola KT, Adeniran JO. Congenital prepubic sinus: a variant of epispadiac dorsal urethral duplication. J Pediatr Urol 2013; 9 (1) e82-e85
• 9 van der Putte SCJ. Normal and abnormal development of the anorectum. J Pediatr Surg 1986; 21 (5) 434-440
• 10 Campbell J, Beasley S, McMullin N, Hutson JM. Congenital prepubic sinus: possible variant of dorsal urethral duplication (Stephens type 2). J Urol 1987; 137 (3) 505-506
• 11 Stephens FD. Abnormal Embryology–Cloacal Dysgenesis. Congenital Malformations of the Urinary Tract. New York, NY: Praeger Scientific.; 1983: 22-23