2018
DOI: 10.1111/1346-8138.14743
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Usefulness of ulceration and hyperkeratosis as clinical predictors of Merkel cell polyomavirus‐negative and combined Merkel cell carcinoma: A retrospective study

Abstract: Merkel cell carcinoma is a rare neuroendocrine carcinoma of the skin that is associated with Merkel cell polyomavirus (MCPyV). The clinical appearance and demographic characteristics of this tumor have been described using the mnemonic AEIOU: asymptomatic, expanding rapidly, immune suppression, older than 50 years, and ultraviolet‐exposed fair skin. In addition, MCC can be categorized based on morphology as pure MCC or combined MCC that exhibits neuroendocrine and other phenotypic elements. There is limited in… Show more

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Cited by 5 publications
(4 citation statements)
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References 35 publications
(69 reference statements)
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“…In this study, ulceration was present in 29.5% (23/55) of primary tumors, with previous reports ranging between 6.7-40% [23][24][25][26]28]. Ulceration associated with absence of the virus and a high N:CD8, with the latter suggesting that ulceration may contribute to a tumor-supporting microenvironment by attracting neutrophils to the wound and surrounding tumor cells, in line with what has been previously shown in melanoma [16,29]. Neutrophils, inflammation and UV exposure can suppress the levels and functions of CD8 lymphocytes and induce inflammation and a local immune-suppressive microenvironment [30,31].…”
Section: Discussionsupporting
confidence: 90%
“…In this study, ulceration was present in 29.5% (23/55) of primary tumors, with previous reports ranging between 6.7-40% [23][24][25][26]28]. Ulceration associated with absence of the virus and a high N:CD8, with the latter suggesting that ulceration may contribute to a tumor-supporting microenvironment by attracting neutrophils to the wound and surrounding tumor cells, in line with what has been previously shown in melanoma [16,29]. Neutrophils, inflammation and UV exposure can suppress the levels and functions of CD8 lymphocytes and induce inflammation and a local immune-suppressive microenvironment [30,31].…”
Section: Discussionsupporting
confidence: 90%
“…However, information is scarce in the literature regarding the relationship between clinical features such as erosion, ulceration, or hyperkeratosis and histopathological subtypes. Clinicians should pay attention to the presence or absence of ulceration or hyperkeratosis because it is an important clinical predictor of MCPyV‐negative and combined MCC 42 . Because the erosion/ulcer type tended to be larger in size compared to the non‐erosion/ulcer type, necrotic MCC changes due to external irritation/trauma or insufficient blood supply of the surface area are possible.…”
Section: Discussionmentioning
confidence: 99%
“…Merkel cell carcinoma is usually described as firm-elastic and painless red to livid hemispherical tumors that can develop rapidly without specific clinical features. 12,[38][39][40][41] Because we noticed in a small case series that ulceration and hyperkeratosis clinically indicated MCPyV-negative and combined MCC, 42 we focused in the current Japanese cases on the presence or absence of skin surface symptoms such as erosion/ulceration. In this study, 30% of cases presented with erosion or ulcer.…”
Section: Discussionmentioning
confidence: 99%
“…[ 26 ] Pure MCCs are localized in the dermis with no epidermal involvement, whereas combined MCC often exhibit epithelial changes, such as ulceration and hyperkeratosis. [ 27 ] Patients with combined MCC, comparing with those with pure MCC were older (median 76.5 vs 69 years) and had more nonmelanoma skin cancer (85% vs 25%), malignant extracutaneous tumors (25% vs 5%), and immunodeficient states (77% vs 35%). Patients with combined MCC had more metastases (77% vs 40%) and shorter survival (41 vs 54 months) than those with pure MCC.…”
Section: Classificationmentioning
confidence: 99%