{"id":610,"date":"2019-03-07T19:56:35","date_gmt":"2019-03-07T19:56:35","guid":{"rendered":"http:\/\/scfredesignpro.wpengine.com\/?page_id=610"},"modified":"2025-04-22T14:27:12","modified_gmt":"2025-04-22T14:27:12","slug":"mcc-risk-factors","status":"publish","type":"page","link":"https:\/\/www.skincancer.org\/skin-cancer-information\/merkel-cell-carcinoma\/mcc-risk-factors\/","title":{"rendered":"Merkel Cell Carcinoma Risk Factors"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_section][vc_row][vc_column][vc_column_text el_class=&#8221;small translation&#8221;]<\/p>\n<p style=\"text-align: right;\">Translation:\u00a0\u00a0 <a href=\"https:\/\/skincancer.org\/international\/le-cancer-de-la-cellule-de-merkel\/\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2507\" src=\"https:\/\/skincancer.org\/wp-content\/uploads\/france-flag-icon-16.png\" alt=\"\" width=\"16\" height=\"11\" \/><\/a>\u00a0<a href=\"http:\/\/skincancer.org\/international\/merkelzell-karzinom-mcc\/\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2508\" src=\"https:\/\/skincancer.org\/wp-content\/uploads\/germany-flag-icon-16.png\" alt=\"\" width=\"16\" height=\"10\" \/><\/a>\u00a0<a href=\"http:\/\/skincancer.org\/international\/il-carcinoma-a-cellule-di-merkel\/\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2509\" src=\"https:\/\/skincancer.org\/wp-content\/uploads\/italy-flag-icon-16.png\" alt=\"\" width=\"16\" height=\"11\" \/><\/a><\/p>\n<p style=\"text-align: right;\"><a href=\"https:\/\/www.skincancer.org\/international\/el-carcinoma-de-celulas-de-merkel\/\">En Espa\u00f1ol<\/a><\/p>\n<p>[\/vc_column_text][vc_column_text]<\/p>\n<h1 style=\"text-align: center;\">Merkel Cell Carcinoma\u00a0<span style=\"color: rgba(50,63,74,0.65);\">Risk Factors<\/span><\/h1>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column offset=&#8221;vc_col-lg-offset-1 vc_col-lg-10&#8243;][vc_custom_heading text=&#8221;The Risks. The Causes. What You Can Do.&#8221; font_container=&#8221;tag:h2|text_align:center&#8221; use_theme_fonts=&#8221;yes&#8221;][\/vc_column][\/vc_row][\/vc_section][vc_section][vc_row el_id=&#8221;risk&#8221;][vc_column width=&#8221;9\/12&#8243;][vc_column_text css=&#8221;&#8221; el_class=&#8221;large&#8221;]<\/p>\n<p class=\"p1\">Anything that increases your likelihood of developing a disease like Merkel cell carcinoma (MCC) is called a risk factor.<\/p>\n<p class=\"p1\">These factors put you at increased risk for the disease. For more information about risk factors, click the links below.<\/p>\n<ul>\n<li><b>History of unprotected exposure<\/b> to <a href=\"http:\/\/skincancer.org\/risk-factors\/uv-radiation\/\">ultraviolet (UV)<\/a> radiation from the sun or indoor tanning.<\/li>\n<li><b>Weakened immune system<\/b>, due to a medical condition or medications.<\/li>\n<li><strong>History of skin cancer<\/strong>, including <a href=\"http:\/\/skincancer.org\/skin-cancer-information\/basal-cell-carcinoma\/\">basal cell carcinoma<\/a> (BCC), <a href=\"http:\/\/skincancer.org\/skin-cancer-information\/squamous-cell-carcinoma\/\">squamous cell carcinoma<\/a> (SCC) or <a href=\"http:\/\/skincancer.org\/skin-cancer-information\/melanoma\/\">melanoma<\/a>.<\/li>\n<li><b>Age<\/b>: Most people who develop MCC are over 50 years old.<\/li>\n<li><b>Gender<\/b>: Men are more likely to get the disease<\/li>\n<li><b>Light skin<\/b>: People with <a href=\"http:\/\/skincancer.org\/risk-factors\/skin-type\/\">light skin<\/a>\u00a0are at greater risk for MCC, but it can affect anyone.<\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/4&#8243;][vc_column_text el_class=&#8221;page-nav&#8221;]<\/p>\n<ul>\n<li><a href=\"#risk\">Risk factors<\/a><\/li>\n<li><a href=\"#causes\">What causes MCC?<\/a><\/li>\n<li><a href=\"#know\">What we do know<\/a><\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][\/vc_section][vc_section full_width=&#8221;stretch_row&#8221; content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1532456871168{background-color: #323f4a !important;}&#8221;][vc_row][vc_column width=&#8221;1\/5&#8243; el_class=&#8221;subpage-nav&#8221;][vc_btn title=&#8221;Overview&#8221; style=&#8221;custom&#8221; custom_background=&#8221;#323f4a&#8221; custom_text=&#8221;#ffcc42&#8243; shape=&#8221;square&#8221; size=&#8221;lg&#8221; align=&#8221;center&#8221; i_align=&#8221;right&#8221; i_icon_fontawesome=&#8221;fa fa-arrow-right&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:https%3A%2F%2Fwww.skincancer.org%2Fskin-cancer-information%2Fmerkel-cell-carcinoma%2F|||&#8221;][\/vc_column][vc_column width=&#8221;1\/5&#8243; el_class=&#8221;subpage-nav&#8221;][vc_btn title=&#8221;Warning Signs&#8221; style=&#8221;custom&#8221; custom_background=&#8221;#323f4a&#8221; custom_text=&#8221;#ffcc42&#8243; shape=&#8221;square&#8221; size=&#8221;lg&#8221; align=&#8221;center&#8221; i_align=&#8221;right&#8221; i_icon_fontawesome=&#8221;fa fa-arrow-right&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:http%3A%2F%2Fwww.skincancer.org%2Fskin-cancer-information%2Fmerkel-cell-carcinoma%2Fmcc-warning-signs%2F|title:Merkel%20Cell%20Carcinoma%20Warning%20Signs||&#8221;][\/vc_column][vc_column width=&#8221;1\/5&#8243; el_class=&#8221;subpage-nav&#8221;][vc_btn title=&#8221;Stages&#8221; style=&#8221;custom&#8221; custom_background=&#8221;#323f4a&#8221; custom_text=&#8221;#ffcc42&#8243; shape=&#8221;square&#8221; size=&#8221;lg&#8221; align=&#8221;center&#8221; i_align=&#8221;right&#8221; i_icon_fontawesome=&#8221;fa fa-arrow-right&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:http%3A%2F%2Fwww.skincancer.org%2Fskin-cancer-information%2Fmerkel-cell-carcinoma%2Fstages%2F|title:Merkel%20Cell%20Carcinoma%20Stages||&#8221;][\/vc_column][vc_column width=&#8221;1\/5&#8243; el_class=&#8221;subpage-nav&#8221;][vc_btn title=&#8221;Treatment&#8221; style=&#8221;custom&#8221; custom_background=&#8221;#323f4a&#8221; custom_text=&#8221;#ffcc42&#8243; shape=&#8221;square&#8221; size=&#8221;lg&#8221; align=&#8221;center&#8221; i_align=&#8221;right&#8221; i_icon_fontawesome=&#8221;fa fa-arrow-right&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:http%3A%2F%2Fwww.skincancer.org%2Fskin-cancer-information%2Fmerkel-cell-carcinoma%2Fmcc-treatment%2F|title:Merkel%20Cell%20Carcinoma%20Treatment||&#8221;][\/vc_column][vc_column width=&#8221;1\/5&#8243; el_class=&#8221;subpage-nav&#8221;][vc_btn title=&#8221;Patient Support&#8221; style=&#8221;custom&#8221; custom_background=&#8221;#323f4a&#8221; custom_text=&#8221;#ffcc42&#8243; shape=&#8221;square&#8221; size=&#8221;lg&#8221; align=&#8221;center&#8221; i_align=&#8221;right&#8221; i_icon_fontawesome=&#8221;fas fa-arrow-right&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:https%3A%2F%2Fwww.skincancer.org%2Fskin-cancer-information%2Fmerkel-cell-carcinoma%2Fmcc-patient-support%2F|title:Merkel%20Cell%20Carcinoma%20Patient%20Support%20Center||&#8221;][\/vc_column][\/vc_row][\/vc_section][vc_section][vc_row el_class=&#8221;content-block&#8221; el_id=&#8221;causes&#8221;][vc_column width=&#8221;1\/3&#8243;][vc_custom_heading text=&#8221;What causes MCC?&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221;][\/vc_column][vc_column width=&#8221;2\/3&#8243;][vc_column_text]Cancers are caused by DNA changes in cells. While scientists and researchers know the risk factors behind Merkel cell carcinoma, they are still working to gain a comprehensive understanding of precisely how these factors lead to the DNA changes that result in the disease. Since MCC does not seem to run in families, these DNA changes most likely happen during the course of a person\u2019s life.[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=&#8221;content-block&#8221; el_id=&#8221;know&#8221;][vc_column width=&#8221;1\/3&#8243;][vc_custom_heading text=&#8221;What we do know&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221;][\/vc_column][vc_column width=&#8221;2\/3&#8243;][vc_column_text]<\/p>\n<h4>UV exposure creates a double threat for MCC<\/h4>\n<p>Not only does UV exposure cause damage that increases your skin cancer risk; it also suppresses your immune system. This reduces its ability to repair damage and fight skin cancers and other diseases.\u00a0No matter the source of UV radiation, there is a clear and dangerous correlation between exposure and MCC.<\/p>\n<h4>Immunosuppression\u00a0and MCC are strongly linked.<\/h4>\n<p>If your <strong>immune system<\/strong> is persistently weakened or suppressed, you are about 15 times more likely to develop MCC than people with healthy immune systems. However, more than 90 percent of MCC cases arise in people with no known immune problems. Immunosuppression can be caused by:<\/p>\n<ul class=\"ul1\">\n<li class=\"li1\"><strong>Diseases<\/strong> such as HIV and certain cancers including <strong>chronic lymphocytic leukemia<\/strong>\u00a0and\u00a0<strong>lymphomas<\/strong>.<\/li>\n<li class=\"li1\"><strong>Immunosuppressant medications<\/strong> used for <a href=\"https:\/\/www.skincancer.org\/blog\/after-a-transplant-new-dangers\/\" target=\"_blank\" rel=\"noopener\">transplant recipients<\/a> and for autoimmune diseases including lupus, psoriasis, Crohn\u2019s disease and rheumatoid arthritis.<\/li>\n<\/ul>\n<p>Immunosuppressed MCC patients often develop the disease at a far younger age; about half of MCCs in these patients occur before age 50.<\/p>\n<p>If your immune system is suppressed, talk to your doctors about your chances of developing MCC, and be sure to protect yourself against other risk factors, especially UV exposure.<\/p>\n<p><strong>A history of skin cancer<\/strong> is also highly associated with Merkel cell carcinoma. If you\u2019ve had <a href=\"http:\/\/skincancer.org\/skin-cancer-information\/melanoma\/\">melanoma<\/a>, <a href=\"http:\/\/skincancer.org\/skin-cancer-information\/squamous-cell-carcinoma\/\">squamous cell carcinoma<\/a>, <a href=\"http:\/\/skincancer.org\/skin-cancer-information\/basal-cell-carcinoma\/\">basal cell carcinoma<\/a> or Bowen\u2019s disease (an early form of SCC) \u2014 skin cancers frequently caused by UV exposure \u2014 you are more likely to develop MCC.<\/p>\n<h4>Merkel cell polyomavirus and MCC<\/h4>\n<p>Evidence of the Merkel cell polyomavirus can be found in most, but not all, Merkel cell tumors. The virus, discovered in 2008, lives in the skin of most people, without signs and symptoms, and without ever developing into MCC. Since it\u2019s a very common virus, and since MCC is an extremely rare disease, scientists are still not certain about exactly how or why the virus causes Merkel cell carcinoma in some people. What is clear is that other factors such as <a href=\"http:\/\/skincancer.org\/risk-factors\/uv-radiation\/\">UV exposure<\/a> and immunosuppression also play a role in initiating the growth of MCC tumors.[\/vc_column_text][\/vc_column][\/vc_row][\/vc_section][vc_row][vc_column width=&#8221;2\/3&#8243;][vc_column_text css=&#8221;&#8221;]<strong><em>Reviewed by:<\/em><\/strong><\/p>\n<p><em>Sandra D&#8217;Angelo, MD<\/em><br \/>\n<em>Paul Nghiem, MD, PhD<\/em>[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/3&#8243;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/3&#8243;][\/vc_column][vc_column width=&#8221;1\/3&#8243;][\/vc_column][vc_column width=&#8221;1\/3&#8243;][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_section][vc_row][vc_column][vc_column_text el_class=&#8221;small translation&#8221;] Translation:\u00a0\u00a0 \u00a0\u00a0 En Espa\u00f1ol [\/vc_column_text][vc_column_text] Merkel Cell Carcinoma\u00a0Risk Factors [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column offset=&#8221;vc_col-lg-offset-1 vc_col-lg-10&#8243;][vc_custom_heading text=&#8221;The Risks. The Causes. What [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":591,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-610","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.3 (Yoast SEO v25.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Merkel Cell Carcinoma Risk Factors - The Skin Cancer Foundation<\/title>\n<meta name=\"description\" content=\"Find out the factors that can increase your risk for Merkel cell carcinoma (MCC), a rare and deadly skin cancer and learn about the possible causes of MCC.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.skincancer.org\/skin-cancer-information\/merkel-cell-carcinoma\/mcc-risk-factors\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Merkel Cell Carcinoma Risk Factors\" \/>\n<meta property=\"og:description\" content=\"Find out the factors that can increase your risk for Merkel cell carcinoma (MCC), a rare and deadly skin cancer and learn about the possible causes of MCC.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.skincancer.org\/skin-cancer-information\/merkel-cell-carcinoma\/mcc-risk-factors\/\" \/>\n<meta property=\"og:site_name\" content=\"The Skin Cancer Foundation\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/skincancerfoundation\" \/>\n<meta property=\"article:modified_time\" content=\"2025-04-22T14:27:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.skincancer.org\/wp-content\/uploads\/france-flag-icon-16.png\" \/>\n\t<meta property=\"og:image:width\" content=\"16\" \/>\n\t<meta property=\"og:image:height\" content=\"11\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@skincancerorg\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.skincancer.org\/skin-cancer-information\/merkel-cell-carcinoma\/mcc-risk-factors\/\",\"url\":\"https:\/\/www.skincancer.org\/skin-cancer-information\/merkel-cell-carcinoma\/mcc-risk-factors\/\",\"name\":\"Merkel Cell Carcinoma Risk Factors - 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