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Clonal keratosis

V Papageorgiou, Z Apalla, E Sotiriou, C Papageorgiou, E Lazaridou, S Vakirlis, D Ioannides, A Lallas
Dermoscopy has been documented to increase the diagnostic accuracy of clinicians evaluating skin tumours, improving their ability to detect skin cancer and better recognize benign moles. However, dermoscopically 'false-positive' and 'false-negative' tumours do exist. False-positive diagnosis usually leads to unnecessary excisions. False-negative diagnosis is much more dangerous, as it might result in overlooking a cancer, with severe undesirable consequences for the patient and the physician. Therefore, management strategies should mainly focus on addressing the risk of dermoscopically false-negative tumours...
January 5, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
Inchara Yeliur Kalegowda, Almut Böer-Auer
Clonal seborrheic keratosis (CSK) and pagetoid Bowen disease (squamous cell carcinoma in situ) (PBD) share similar histological features making it sometimes difficult to differentiate the 2. The study group included 29 and 13 cases of CSK and PBD, respectively. Both groups were examined histopathologically (suprabasal mitotic figures, broad rete ridges, crowding of nuclei, nuclear pleomorphism, necrotic keratinocytes, parakeratosis, and dermal inflammation) and immunohistochemically (CK10, Ki-67, and p16). P values for all parameters were calculated using Fisher exact test, 2 tailed...
June 2017: American Journal of Dermatopathology
Akane Minagawa
Making a definitive diagnosis of seborrheic keratosis (SK) can be challenging for the naked eye due to its wide variation in clinical features. Fortunately, however, most cases of SK exhibit the typical dermoscopic findings of fissures and ridges, hairpin vessels with white halo, comedo-like openings, and milia-like cysts, all of which are helpful to distinguish SK from melanoma, melanocytic nevus, squamous cell carcinoma, basal cell carcinoma (BCC) and other skin tumors. Histopathologically, these dermoscopic characteristics correspond to papillomatous surface of the epidermis, enlarged capillaries of the dermal papillae, pseudohorn cysts in the epidermis opened to the surface of the lesion and intraepidermal cysts, respectively...
May 2017: Journal of Dermatology
Toshiaki Kogame, Hirotsugu Tanimura, Sei Nakamaru, Kaoru Makimura, Hiroyuki Okamoto, Takahiro Kiyohara
A 79-year-old Japanese woman presented with an ulcerated, brown-red nodule in the center of a sharply demarcated, tan-brown plaque situated on the left side of her right breast. Histologically, the plaque demonstrated an acanthosis with an intraepidermal epithelioma of Borst-Jadassohn. Small oval nests of bland-appearing basophilic cells in the periphery gradually enlarged into nests of various sizes and irregular shapes, composed of densely cohesive, atypical basophilic cells above the central nodule. The atypical keratinocytes shifted to atypical spindle cells beneath the acanthotic epidermis, penetrating deep into the subcutaneous tissue...
March 31, 2017: Journal of Dermatology
Nam Kyung Roh, Hyung Jin Hahn, Yang Won Lee, Yong Beom Choe, Kyu Joong Ahn
BACKGROUND: Seborrheic keratosis (SK) is one of the most common epidermal tumors of the skin. However, only a few large-scale clinicohistopathological investigations have been conducted on SK or on the possible correlation between histopathological SK subtype and location. OBJECTIVE: The aim of this study was to analyze the clinical and histopathological features of a relatively large number of cases of diagnosed SK. METHODS: Two hundred and seventy-one pathology slides of skin tissue from patients with clinically diagnosed SK and 206 cases of biopsy-proven SK were analyzed...
April 2016: Annals of Dermatology
Lorenzo Squillace, Milena Cappello, Caterina Longo, Elvira Moscarella, Roberto Alfano, Giuseppe Argenziano
BACKGROUND: Seborrheic keratoses (SKs) may sometimes mimic benign and malignant skin tumors, and a biopsy can be necessary in order to rule out malignancy. METHODS: From the database of our pigmented lesion clinic, we evaluated the dermoscopic features of difficult-to-diagnose SKs that were biopsied between January 2010 and December 2014. RESULTS: SKs represented 3.8% of all excised lesions (161/ 4,182). Specifically, 91 (56.5%) were excised to rule out melanoma, 63 (39...
2016: Dermatology: International Journal for Clinical and Investigative Dermatology
F Persechino, C Longo, A M Cesinaro, E Cinotti, S Ciardo, G Pellacani, S Bassoli
No abstract text is available yet for this article.
February 2016: Annales de Dermatologie et de Vénéréologie
Shiro Niiyama, Toshiaki Oharaseki, Hideki Mukai
Hidroacanthoma simplex is a benign tumor of the skin, macroscopically resembling seborrheic keratosis or Bowen's disease and histologically mimicking clonal-type seborrheic keratosis. We observed a plaque of 70 × 50 mm on the right flank part. From clinical appearance, we suspected Bowen's disease; however, based on immunohistochemical findings, we made a diagnosis of hidroacanthoma simplex.
September 2015: Case Reports in Dermatology
Noriyuki Misago, Takuya Inoue, Shuji Toda
We herein report a patient who clinically presented with a yellowish, flat plaque that histopathologically showed a benign lesion mainly composed of intraepidermal basaloid nests with sebaceous differentiation. This lesion was considered to be fundamentally apocrine poroma (hidroacanthoma simplex type) with sebaceous differentiation. Nests composed of typical poroid cells were seen, and the results of immunostaining for lumican supported this diagnosis and excluded the possibility of clonal seborrheic keratosis...
February 2016: Journal of Cutaneous Pathology
Sheena Ramyead, Salvador J Diaz-Cano, Lucia Pozo-Garcia
No abstract text is available yet for this article.
August 2015: Journal of the American Academy of Dermatology
Mirjana Popadić
No abstract text is available yet for this article.
May 2015: Journal of the American Academy of Dermatology
M Majores, E Bierhoff
Actinic (solar) keratosis is an intraepidermal squamous neoplasm of sun-damaged skin and by far the most frequent neoplastic skin lesion. A subdivison into three grades has been proposed with increasing acceptance not least because of the therapeutic consequences. The transition to invasive squamous cell carcinoma is reported in 5-10 % and with immunosuppression in 30 % of patients.Bowen's disease is a variant of squamous cell carcinoma in situ of the skin and the mucocutaneous junction. The differentiation from bowenoid papulosis as a lesion associated with human papillomavirus (HPV), actinic (solar) keratosis grade III, intraepidermal poroid lesions and in cases of clonal type from clonal seborrhoic keratosis and Paget's disease is very important...
February 2015: Der Pathologe
Yota Sato, Taku Fujimura, Erika Tamabuchi, Takahiro Haga, Setsuya Aiba
Hidroacanthoma simplex (HAS), also known as intraepidermal eccrine poroma, is a rare eccrine adnexal tumor that tends to be misdiagnosed as other types of benign skin tumor, including clonal seborrheic keratosis. Notably, HAS is sometimes misdiagnosed and treated by cryosurgery as seborrheic keratosis, which could trigger the later development of porocarcinoma. Therefore, accurate diagnosis of HAS is indispensable for dermatologists to avoid the development of malignant tumors by an unsuitable treatment. In this report, we present the characteristic dermoscopy findings of HAS...
May 2014: Case Reports in Dermatology
Jason C Reutter, Kim R Geisinger, Jennifer Laudadio
OBJECTIVE: We sought to determine the prevalence of human papillomavirus (HPV) subtypes in vulvar seborrheic keratoses (SK) by polymerase chain reaction (PCR) in women with a theoretically low risk of recent HPV transmission. We also attempted to identify which histopathologic features best correlated with HPV and specific subtypes. METHODS: Twenty-eight cases of vulvar SK in women older than 50 years old were retrospectively pulled from our files from a 7-year period...
April 2014: Journal of Lower Genital Tract Disease
C Longo, I Zalaudek, E Moscarella, A Lallas, S Piana, G Pellacani, G Argenziano
BACKGROUND: The diagnosis of clonal seborrheic keratosis may be challenging clinically and histologically. OBJECTIVE: In our study, we describe the common aspects of this benign entity that show peculiar dermoscopic and confocal findings. METHODS: A total of nine clonal seborrheic keratosis were analyzed. RESULTS: Upon dermoscopy, it reveals the presence of globular-like structures and sharply demarcated borders whereas confocal microscopy displays the typical intraepidermal nesting of pigmented keratinocytes that permits to have a reliable in vivo diagnosis...
October 2014: Journal of the European Academy of Dermatology and Venereology: JEADV
Sarah E Yagerman, Ashfaq A Marghoob
No abstract text is available yet for this article.
August 2013: Journal of the American Academy of Dermatology
Nobuko Yoshimi, Yasutomo Imai, Ayako Kakuno, Airo Tsubura, Kiyofumi Yamanishi, Ichiro Kurokawa
OBJECTIVES: Seborrheic keratosis (SK) is classified into six types: hyperkeratotic; acanthotic; irritated; clonal; reticulated; and adenoid. However, the origins of the respective types of SK remain unclear. METHODS: To clarify the histogenetic origins of SK, we performed immunohistochemical studies of keratin (K) and filaggrin expression, taking into account the histopathological classifications of SK. RESULTS: Hyperkeratotic SK mainly expressed K1, K10, and filaggrin...
June 2014: International Journal of Dermatology
Ryoko Takayama, Shin-Ichi Ansai, Toshiyuki Ishiwata, Tetsushi Yamamoto, Yoko Matsuda, Zenya Naito, Seiji Kawana
Lumican, a member of the small leucine-rich proteoglycan family, regulates the assembly and diameter of collagen fibers in the extracellular matrix of various tissues. The lumican expression correlates with pathological conditions and the growth and metastasis of various malignancies. In cutaneous neoplasms, the lumican expression is lower in advanced-stage malignant melanomas that invade the dermis than in early-stage melanomas. Furthermore, we have recently reported that the expression pattern of lumican is different from that of actinic keratosis and the Bowen disease...
August 2014: American Journal of Dermatopathology
Alan S Boyd, Lloyd E King
The intraepidermal epithelioma (of Borst-Jadasson) constitutes a much discussed and debated entity. Currently, this diagnosis is rarely made in part, as ascribing clinical features to such lesions has, to date, proven difficult. In addition, intraepidermal proliferation of atypical cells with clonal features is more likely diagnosed as squamous cell carcinomas in situ, porocarcinomas or inflamed seborrheic keratoses. However, cutaneous tumors exhibiting microscopic and immunohistochemical features of clonally profligate malignant basaloid cells solely of epidermal origin do rarely exist...
April 2013: Pathology, Research and Practice
Olga Simionescu, Bogdan Ovidiu Popescu, Mariana Costache, Emilia Manole, Stefan Spulber, Mihaela Gherghiceanu, Andreas Blum
The aetiology of seborrheic keratoses (SK), the most common benign epithelial tumours, and any relationship with malignancy are not yet known. As a protective anti-cancer mechanism, apoptosis reflects cellular loss as a reaction to proliferative activity. The objective of this study was to quantify apoptosis in different SK types (acanthotic, hyperkeratotic, reticulated, irritated and clonal) and correlate the dermoscopic picture with apoptosis rate. After a qualitative and quantitative analysis of dermoscopic images, we defined a new quantitative dermoscopic score (C3V2F, crypts, millia cysts, colours, hairpin vessels, irregular vessels, fissures) from 0 to 22, which enabled us to establish cut-offs correlating with apoptosis rates...
June 2012: Journal of Cellular and Molecular Medicine
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