The site of origin of a histologically documented carcinoma is not identified clinically in approximately 3% of patients; this situation is often referred to as carcinoma of unknown primary (CUP) origin or occult primary malignancy.[1,2,3,4,5,6]
Prognosis and Survival
The definition of a CUP varies from study to study; however, at a minimum, this determination should include a biopsy of the tumor and a thorough history and complete physical examination that includes head and neck, rectal,...
Stage II penile cancer is most frequently managed by penile amputation for local control. Whether the amputation is partial, total, or radical will depend on the extent and location of the neoplasm. External-beam radiation therapy and brachytherapy with surgical salvage are alternative approaches.[2,3,4,5,6]
Treatment options under clinical evaluation:
Nd:YAG laser therapy has been used to preserve the penis in selected patients with small lesions.
Because of the high incidence of microscopic node metastases, elective adjunctive dissection of clinically uninvolved (negative) lymph nodes in conjunction with amputation is often used for patients with poorly differentiated tumors. Lymphadenectomy, can carry substantial morbidity, such as infection, skin necrosis, wound breakdown, chronic edema, and even a low, but finite, mortality rate. The impact of prophylactic lymphadenectomy on survival is not known.[8,9,10,11]
To reduce the morbidity associated with prophylactic lymphadenectomy, dynamic sentinel node biopsy is being used in patients with stage T2 clinically node-negative penile cancer. One retrospective single-institution study of 22 patients reported a false-negative rate of 11%.
Current Clinical Trials
Check for U.S. clinical trials from NCI's list of cancer clinical trials that are now accepting patients with stage II penile cancer. The list of clinical trials can be further narrowed by location, drug, intervention, and other criteria.
General information about clinical trials is also available from the NCI Web site.
Penis. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 447-55.
Harty JI, Catalona WJ: Carcinoma of the penis. In: Javadpour N, ed.: Principles and Management of Urologic Cancer. 2nd ed. Baltimore, Md: Williams and Wilkins, 1983, pp 581-597.
Schellhammer PF, Spaulding JT: Carcinoma of the penis. In: Paulson DF, ed.: Genitourinary Surgery. Vol. 2. New York: Churchill Livingston, 1984, pp 629-654.
Johnson DE, Lo RK: Tumors of the penis, urethra, and scrotum. In: deKernion JB, Paulson DF, eds.: Genitourinary Cancer Management. Philadelphia, Pa: Lea and Febiger, 1987, pp 219-258.
McLean M, Akl AM, Warde P, et al.: The results of primary radiation therapy in the management of squamous cell carcinoma of the penis. Int J Radiat Oncol Biol Phys 25 (4): 623-8, 1993.
Crook JM, Jezioranski J, Grimard L, et al.: Penile brachytherapy: results for 49 patients. Int J Radiat Oncol Biol Phys 62 (2): 460-7, 2005.
Horenblas S, van Tinteren H, Delemarre JF, et al.: Squamous cell carcinoma of the penis. II. Treatment of the primary tumor. J Urol 147 (6): 1533-8, 1992.
Theodorescu D, Russo P, Zhang ZF, et al.: Outcomes of initial surveillance of invasive squamous cell carcinoma of the penis and negative nodes. J Urol 155 (5): 1626-31, 1996.
Lindegaard JC, Nielsen OS, Lundbeck FA, et al.: A retrospective analysis of 82 cases of cancer of the penis. Br J Urol 77 (6): 883-90, 1996.
Ornellas AA, Seixas AL, Marota A, et al.: Surgical treatment of invasive squamous cell carcinoma of the penis: retrospective analysis of 350 cases. J Urol 151 (5): 1244-9, 1994.
Young MJ, Reda DJ, Waters WB: Penile carcinoma: a twenty-five-year experience. Urology 38 (6): 529-32, 1991.
Perdonà S, Autorino R, De Sio M, et al.: Dynamic sentinel node biopsy in clinically node-negative penile cancer versus radical inguinal lymphadenectomy: a comparative study. Urology 66 (6): 1282-6, 2005.
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May 28, 2015
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