Sarcomatous carcinoma with osteosarcomatoid differentiation of the bladder with simultaneous sigmoid colon adenocarcinoma

Journal of Surgical Case Reports, May 2011

Atilgan, D, Parlaktas, BS, Uluocak, N, Erdemir, F

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Sarcomatous carcinoma with osteosarcomatoid differentiation of the bladder with simultaneous sigmoid colon adenocarcinoma

JSCR Journal of Surgical Case Reports http://jscr.co.uk Sarcomatous carcinoma with osteosarcomatoid differentiation of the bladder with simultaneous sigmoid colon adenocarcinoma 0 Authors: D Atilgan, BS Parlaktas, N Uluocak, F Erdemir Location: Faculty of Medicine, Gaziosmanpasa University , Turkey Citation: Atilgan D, Parlaktas BS , Uluocak N, Erdemir F. Sarcomatous carcinoma with osteosarcomatoid differentiation of the bladder with simultaneous sigmoid colon adenocarcinoma. JSCR. 2011 5:4 Sarcomatoid carcinoma is a rare tumor of the urinary bladder and accounts for approximately 0.3% of all bladder malignancies. In these tumors, histogenesis and biological behaviour remains controversial. Herein, we report a case of sarcomatoid carcinoma with osteosarcomatoid differentiation of the urinary bladder with simulataneous sigmoid colon adenocarcinoma . Sarcomatoid Carcinoma of the Bladder (SCB) which consists of sarcomatous and carcinomatous components simultaneously are very rare variants of Transitional Cell Carcinoma (TCC). Sarcomatoid carcinoma is known to occur in only 0.3% of total bladder cancers (1). Approximately 80 cases have been reported in the literature and most often as a single case report. In the histopathological examination of these tumors usually epithelial and connective tissue elements are seen together (2). In this  report, a case of sarcomatoid carcinoma of the bladder with osteosarcomatoid differentiation and simultaneous colonic adenocarcinoma was presented and discussed. INTRODUCTION With these findings the patient underwent radical cystoprostatectomy and ileal conduit operation. Additionally, pelvic lymph node dissection was performed. During the operation, it was realised that the tumor has infiltrated sigmoid colon posteriorly and a concurrent mass of sigmoid colon was detected which has not been established radiologically in the pre-operative period. Due to these findings resection of the sigmoid colon was added to the procedure. Histopathological examination of the specimen revealed that tumor contained high grade TCC with osteosarcomatoid differentiation. It had invaded  serousal layer of the sigmoid colon and perivesical fat without lymphomatoid metastasis and without prostatic infiltration. A well differentiated adenocarcinoma with serousal layer infiltration was detected in the sigmoid colon at the same time. Microscopic findings of both tumors are shown in Figure 2. After an uneventful early postoperative period, the patient and laboratory examinations were good in the follow up controls. But the patient died due to disease in the sixth month postoperatively. DISCUSSION The sarcomatoid carcinoma of the bladder is a very rare neoplasm with poor prognosis. The SCB consists both epithelial and mesenchymal components. The epitelial components are squamous, glandular or high grade transitional carcinoma. Whereas the mesenchymal components  may be  chondrosarcoma, malignant fibrous histiocytoma, osteosarcoma, leiomyosarcoma, fibrosarcoma or rhabdomyosarcoma ( 3 ). SCB is a very lethal tumor with  approximately 50% mortality rate. Lopez-Beltran reported that  81% of  patients with SCB (n=26) died within 9.8 months and SCB has been seen mostly in males with a mean age of 72 years. Patients usually presented with irritative lower urinary tract symptoms and gross haematuria. The great majority of the patients had advanced stage disease at the initial diagnosis ( 4 ). The overall 5-year cancer specific survival rate after cystectomy  was only 20.3% ( 5 ). Because of its unfavourable histopathologic nature and rarity, there is not enough  page 2 / 3 knowledge about the treatment options  and prognosis of SCB in the literature. Even though transurethral resection, radical cystectomy, neoadjuvant chemoradiotherapy were the proposed treatment protocols of the SCB, radical cystectomy with adjuvant chemotherapy was the most appropriate treatment option due to the patient’s poor prognosis( 6-9 ). Nevertheless mean survival rates of patients with SCB very poor and metastatic disease occurs in 66% of patients within 1 year (10). CONCLUSION Sarcomatoid Carcinoma of the Bladder is a very lethal and aggresive tumor  with poor prognosis and more vigorous treatment protocols should be applied in such patients. Further  studies with a number of cases and longer follow up periods are needed to illuminate clinical significance and prognosis of this disease, as well. 1. Arenas LF , Fontes DA , Pereira EM , Hering FL . Sarcomatoid carcinoma with osseous differentiation in the bladder . Int Braz J Urol 2006 , 32 : 563 - 5 2. Iezzoni JC , Mills SE . Sarcomatoid carcinomas (carcinosarcomas) of the gastrointestinal tract: a review . Semin Diagn Pathol 1993 , 10 : 176 - 87 3. Torenbeek R , Blomjous CEM , De Bruin PC , Newling DWW , Meijer CJLM . Sarcomatoid carcinoma of the urinary bladder: clinicopathologic analysis of 18 cases with immunohistochemical and electron microscopic findings . Am J Surg Pathol 1994 , 18 ( 3 ): 241 - 49 4. Lopez-Beltran A , Pacelli A , Rothenberg HJ , Wollan PC , Zincke H , Blute ML . Carcinosarcoma and sarcomatoid carcinoma of the bladder: clinicopathological study of 41 cases . J Urol 1998 , 159 : 1497 - 503 5. Wang J , Wang FW , LaGrange CA , Hemstreet III GP , Kessinger A. Clinical Features of Sarcomatoid Carcinoma (Carcinosarcoma) of the Urinary Bladder: Analysis of 221 Cases . Sarcoma 2010 , Epub 2010 Jul 18 6. Nimeh T , Kuang W , Levin HS , Klein EA . Sarcomatoid transitional cell carcinoma of bladder managed with transurethral resection alone . J Urol 2002 , 167 : 641 - 2 7. Hoshi S , Sasaki M , Muto A . Case of carcinosarcoma of urinary bladder obtained a pathologically complete response by neoadjuvant chemoradiotherapy . Int J Urol . 2007 , 14 ( 1 ): 79 - 81 8. Damiano R , D'Armiento M , Cantiello F. Gemcitabine and cisplatin following surgical treatment of urinary bladder carcinosarcoma . Tumori 2004 , 90 ( 5 ): 458 - 60 9. Froehner M , Gaertner HJ , Manseck A , Wirth MP . Durable complete remission of metastatic sarcomatoid carcinoma of the bladder with cisplatin and gemcitabine in an 80-year-old man . Urology 2001 , 58 ( 5 ): 799 10. Wright JL , Black PC , Brown GA . Differences in survival among patients with sarcomatoid carcinoma, carcinosarcoma and urothelial carcinoma of the bladder . 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Atilgan, D, Parlaktas, BS, Uluocak, N, Erdemir, F. Sarcomatous carcinoma with osteosarcomatoid differentiation of the bladder with simultaneous sigmoid colon adenocarcinoma, Journal of Surgical Case Reports, 2011, 4, DOI: 10.1093/jscr/2011.5.4