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2015:81:4;431-433
doi: 10.4103/0378-6323.158661
PMID: 26087102

Multiple asymptomatic papules on the glans penis

Cunjian Zhou, Zhifang Zhai, Xichuan Yang, Zhu Shen
 Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China

Correspondence Address:
Zhu Shen
Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing 400038
China
How to cite this article:
Zhou C, Zhai Z, Yang X, Shen Z. Multiple asymptomatic papules on the glans penis. Indian J Dermatol Venereol Leprol 2015;81:431-433
Copyright: (C)2015 Indian Journal of Dermatology, Venereology, and Leprology

A 71-year-old man presented with a 3-month history of asymptomatic glans penis lesions [Figure - 1] and [Figure - 2], with numerous red, indurated, partially fusing 1 mm papules. There was no inguinal lymphadenopathy. Complete blood count, routine urinalysis, stool microscopy and liver and renal function test results were normal. Results for a serological test for human immunodeficiency virus, and both the toluidine red unheated serum test (TRUST) and Treponema pallidum particle agglutination tests for syphilis were negative. The patient had been diagnosed with prostatic adenocarcinoma in May 2009. He had undergone surgery at that time and was receiving abiraterone acetate (Zytiga) treatment for the past 10 months. Computed tomography confirmed widespread osseous [Figure - 3] and lymphatic metastases; however, metastases were not observed in the retroperitoneal and pelvic lymph nodes at admission or 3 months later.

Figure 1: Multiple papules on the glans penis (dorsal side)
Figure 2: Similar papules on the glans penis (ventral side)
Figure 3: Computed tomography scan showed metastasis of sternum, thoracic vertebra and spealbone

Biopsy of the papule on the penis showed nests of poorly differentiated tumor cells in the whole dermis, with thinned epidermis [Figure - 4]. The tumor cells showed pale cytoplasm with gland formation [Figure - 5]. A few of the tumor cells were positive for prostate specific antigen (PSA) [Figure - 6]. The tumor cells were positive for cytokeratin [Figure - 7], but negative for P63, P504S, CD31, and D2-40.

Figure 4: A thinned epidermis and neoplastic cells filling the dermis (H and E, 25×)
Figure 5: The tumor cells with pale cytoplasm, showing adenoid formation (H and E, 100×)
Figure 6: Immunohistochemistry showing individual cytoplasmic positivity for prostate-specific antigen (200×)
Figure 7: Immunohistochemistry showing cytoplasmic positivity for cytokeratin (100×)

What is your diagnosis?



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References
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