alexa Giant Seborrheic Keratosis of the Genitalia Clinically Mimicking a Genital Wart | Open Access Journals
ISSN: 2155-9554
Journal of Clinical & Experimental Dermatology Research
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Giant Seborrheic Keratosis of the Genitalia Clinically Mimicking a Genital Wart

Alan Sevil1* and Cumhur Ibrahim Başsorgun2

1Dermatologist, Dermatology and Venereology konyaaltı antalya, Akdeniz University, Turkey

2Assistant professor, Akdeniz University, Antalya, Turkey

*Corresponding Author:
Akdeniz Sevil
Dermatologist, Dermatology and Venereology konyaalti antalya
Akdeniz University, Turkey
Tel: 02422496699, 05052184284
Email: [email protected]

Received date: July 09, 2013; Accepted date: September 07, 2013; Published date: September 14, 2013

Citation: Sevil A, Başsorgun CI (2013) Giant Seborrheic Keratosis of the Genitalia Clinically Mimicking a Genital Wart. J Clin Exp Dermatol Res 4:185. doi:10.4172/2155-9554.1000185

Copyright: © 2013 Sevil A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Abstract

Seborrheic keratosis is one of the most prevalent benign skin tumors. It is most frequently determined in body, extremities, head and neck. Genital region located seborrheic keratosis is rarely encountered and it is frequently misdiagnosed as genital wart. HPV has been blamed in etiology. Genital HPV positivity at varying rates in genital and extra-genital located SK’s has been reported. In this study, we reported a 35 year-old male case applied to the hospital with common verrucous masses in external genital region. Dermoscopic examination showed fissures and ridges, cerebriform appearance comedo-like openings, consistent with SK. The histopathology confirmed the diagnosis of SK. In histopathologic examination, the acanthosis that include basaloid cell proliferation consisting of thick keratohyalin granules and a keratinized plug structures drew attention on analysis of the sections. HPV was determined on biopsy material through the PCR method. HPV6 and HPV16, HPV6 as the dominant, were determined in performed HPV typing. In our case, HPV growth is a finding supporting the role of HPV in etiology.

Keywords

Genitalia; Seborrheic keratosis; Giant; HPV

Introduction

Seborrheic keratosis is a benign epidermal proliferation that can be observed in whole body except from fingers, palms, and mucosa (except from a case with SK located in conjunctiva reported in the literature) [1].

Seborrheic keratosis is rarely located in the genital region. The cases with genital region localization include a relatively younger age group rather than the cases with classic localization [2,3]. The reason for genital located SK has not been known. In different literatures, because HPV 2 and 3 like particles have not been encountered in nucleus of keratinocytes in a little part of the SK samples analyzed in electron-microscope, HPV has been blamed in etiology. Moreover, chronic friction was also blamed in the etiology. Genital HPV positivity at varying rates in genital and extra-genital located SK’s have been reported [4,5].

Genital located SK is a rarely encountered case. And it is generally misdiagnosed as genital wart. In such cases histopathology is beneficial to confirm the diagnosis. Here we reported a rare genital located SK case that has been misdiagnosed as condyloma acuminate case. In our case, the diagnosis of SK was confirmed through the histopathology and dermoscopy.

Case Report

A 35-year-old man was presented with a large verrucous growth on the pubic area and penis of 10 years duration. The lesion started as a small pigmented verrucous papul on the pubic area, which slowly increased in size to become a large verrucous mass and in extent to involve the entire external genitalia. On physical examination, a large, pigmented few verrucous masses (of size around 4 × 4 cm, 2 × 2 cm) and small pigmented verrucous papulas were seen in the external genitalia involving both penis and mons pubis (Figure 1). We considered differential diagnosis of condyloma acuminata, Buschke Lowenstein, verrucous carsinom and giant SK. Dermoscopic examination was carried out, which showed cerebriform appearance, fissures, ridges, and comedo-like openings consistent with SK. The histopathologic examination of a biopsy sample showed acanthosis that include basaloid cell proliferation consisting of thick keratohyalin granules and a keratinized obturator structures (Figure 2). HPV was determined on biopsy material through the PCR method. In performed HPV typing, HPV6 and HPV16, HPV6 as the dominant, were determined.

clinical-experimental-dermatology-verrucous-masses

Figure 1: A large, pigmented few verrucous masses and small pigmented verrucous papules in the external genitalia involving both penis and mons pubis.

clinical-experimental-dermatology-Biopsy-sample

Figure 2: Biopsy sample showing acanthosis.

Discussion

SK is frequently is a vesicant sharply circumscribed benign epidermal proliferation in round or oval shape in a color varying from skin tone to black. Genital located SK is rarely encountered [2,6,7].

HPV has been blamed in etiology. In a study carried out by Tardio et al. in order to clarify contribution of HPV upon the pathogenesis with a group including 40 genital SK and 20 extra-genital SK patients, HPV was not found in 28 (70%) of 40 genital SK samples [3]. HPV 6 was determined in 2 (10%) of 20 extra-genital SK samples. This study supported the relationship between HPV and genital SK. Unlike this study, there have been studies supporting that HPV was not determined in seborrheic keratosis in genital region and had no role upon the pathogenesis in the literature.8 In a study carried out by Serarslan et al. HPV DNA was not found in none of 12 SK samples in the paraffinembedded blocks [9]. In our case, we determined HPV6 and HPV16, HPV6 as the dominant. In a normal healthy human skin, HPV can be found as a part of microbiologic flora [10]. For this reason, determining HPV in skin tumor biopsies can only depend upon the contamination. Consequently, role of HPV on genital SK development has not recently been clarified exactly.

Another reason that can cause complexity in diagnosis apart from determining simultaneous HPV in seborrheic keratosis in genital region is seborrheic keratosis’ much similarity to condylomas histopathologically [11]. Some authors have approved the HPV existence in anogenital SKs and suggested that necessary histopathologic criteria are inadequate for SK diagnosis. Indeed, histopathologic diagnosis criteria of condyloma accuminata and diagnosis criteria of SK reported in dermatology, dermatopathology and pathology textbooks show great similarities [5].

In our case, HPV growth is a finding supporting the role of HPV in etiology. Consequently, we believe that genital region located seborrheic keratosis can be mistaken for condylomas clinically and histopathologically, HPV should be simultaneously researched for seborrheic keratosis determined in the genital region and dermoscopy should also be performed in addition to histopathology in order to confirm the diagnosis. Moreover, we consider that further studies are needed on etiopathogenesis in seborrheic keratosis.

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