{"id":9094,"date":"2026-01-07T00:02:23","date_gmt":"2026-01-07T08:02:23","guid":{"rendered":"https:\/\/www.osmosis.org\/blog\/?p=9094"},"modified":"2026-06-30T14:37:09","modified_gmt":"2026-06-30T22:37:09","slug":"nclex-question-of-the-day-breast-cancer","status":"publish","type":"post","link":"https:\/\/www.osmosis.org\/blog\/nclex-question-of-the-day-breast-cancer","title":{"rendered":"NCLEX-RN\u00ae Question of the Day: Breast cancer"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">In This Article<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.osmosis.org\/blog\/nclex-question-of-the-day-breast-cancer\/#The_correct_answer_to_todays_NCLEX%C2%AE_Question_is%E2%80%A6\" >The correct answer to today&#8217;s NCLEX\u00ae Question is&#8230;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.osmosis.org\/blog\/nclex-question-of-the-day-breast-cancer\/#Main_Takeaway\" >Main Takeaway<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.osmosis.org\/blog\/nclex-question-of-the-day-breast-cancer\/#Incorrect_Answer_Explanations\" >Incorrect Answer Explanations<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.osmosis.org\/blog\/nclex-question-of-the-day-breast-cancer\/#Want_to_learn_more_about_this_topic\" >Want to learn more about this topic?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\"><em>Today\u2019s NCLEX-RN\u00ae question of the day centers on a 71-year-old woman with newly diagnosed breast cancer. Imaging and pathology show malignant glandular cells arising from the ducts and invading beyond the basement membrane. Do you know the answer? Let&#8217;s find out!<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The nurse in the primary care office is reviewing the oncologist\u2019s note&nbsp;in a patient\u2019s chart. <strong>Based on the information, which type of breast cancer&nbsp;best&nbsp;describes this patient\u2019s results?<\/strong>&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Progress Note<\/strong>&nbsp;<\/td><\/tr><tr><td>Patient is a 71-year-old biological female who underwent testing for suspected breast cancer. Cancerous cells appear to have formed from glandular tissue stemming from the wall of the ducts into the lumen. According to imaging, the tumor has crossed the basement membrane.&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. Invasive ductal carcinoma<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. Lobular carcinoma in situ<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. Acinar cell carcinoma<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. Leiomyosarcoma<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Scroll down for the correct answer!<\/em><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Learn with Osmosis\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/iDxHtjjCMbU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_correct_answer_to_todays_NCLEX%C2%AE_Question_is%E2%80%A6\"><\/span>The correct answer to today&#8217;s NCLEX\u00ae Question is&#8230;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. Invasive ductal carcinoma<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rationale:<\/strong> In ductal carcinoma in situ (DCIS) the tumor grows from the wall of the ducts into the lumen. However, as the tumor progresses, it can cross the basement membrane to become invasive ductal carcinoma. Therefore, these findings most likely indicate invasive ductal carcinoma.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Main_Takeaway\"><\/span>Main Takeaway<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most breast cancers are adenocarcinomas, meaning the cancerous cells form from glandular tissue. In ductal carcinoma in situ (DCIS), the tumor grows from the wall of the ducts into the lumen. As the tumor progresses, it can cross the basement membrane to become&nbsp;invasive&nbsp;ductal carcinoma. On the other hand, in lobular carcinoma in situ (LCIS), the tumor cells grow within the lobules without invading the ducts. Now, as the tumor continues to&nbsp;grow&nbsp;it can invade the nearby tissues like the pectoral muscles.&nbsp;The cancerous&nbsp;cells can also enter the lymphatic vessels, causing blockages and a build-up of lymph in the interstitial space. Finally, tumor cells can metastasize, or spread, via the blood or lymph to other parts of the body, like the bones, liver, or lungs.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Incorrect_Answer_Explanations\"><\/span>Incorrect Answer Explanations<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. Lobular carcinoma in situ<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rationale:<\/strong> <strong>In lobular carcinoma in situ (LCIS)<\/strong> the <strong>tumor cells grow within the lobules without invading the ducts<\/strong>. Therefore, this type of breast cancer does not best describe the clinical findings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. Acinar cell carcinoma<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rationale:<\/strong> <strong>Acinar cell carcinoma is a type of pancreatic cancer<\/strong>, therefore this does not best describe the patient\u2019s results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. Leiomyosarcoma<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rationale:<\/strong> <strong>Leiomyosarcoma is a soft tissue sarcoma<\/strong>, therefore it does not best describe the patient\u2019s results.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Want_to_learn_more_about_this_topic\"><\/span>Want to learn more about this topic?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Watch the Osmosis video: <a href=\"https:\/\/www.osmosis.org\/learn\/Breast_cancer:_Nursing_Process_(ADPIE)\">Breast cancer: Nursing process (ADPIE)<\/a><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.osmosis.org\/plans\/rn\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"250\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN3_2023.png?w=700\" alt=\"\" class=\"wp-image-5064\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN3_2023.png 700w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN3_2023.png?resize=300,107 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Try <strong>Osmosis from Elsevier<\/strong> today! Access your&nbsp;<a href=\"https:\/\/www.osmosis.org\/plans\/rn\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>free trial<\/strong><\/a>&nbsp;and find out why millions of current and future <strong>clinicians <\/strong>and <strong>caregivers <\/strong>love learning by Osmosis.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What does it mean when abnormal breast cells cross the thin barrier that once contained them? Explore the pivotal microscopic change that marks a shift in tumor behavior, and why it matters for diagnosis and care.<\/p>\n","protected":false},"author":276,"featured_media":9099,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[20,29,1367,1366,32],"tags":[2529,2533,2536,2534,2538,2531,2535,2532,2540,2530,2528,2539,2537,1029,1263],"class_list":["post-9094","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exam-prep","category-nclex","category-nclex-rn","category-questions","category-nursing","tag-breast-cancer","tag-breast-cancer-diagnosis","tag-breast-cancer-imaging","tag-breast-cancer-treatment","tag-breast-cancer-types","tag-breast-tumor","tag-cancer-invasion","tag-cancer-pathology","tag-cancer-staging","tag-dcis","tag-invasive-ductal-carcinoma","tag-lobular-carcinoma","tag-metastatic-cancer","tag-nursing-care","tag-oncology-nursing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCLEX-RN\u00ae Question of the Day: Breast cancer - Osmosis Blog<\/title>\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.osmosis.org\/blog\/nclex-question-of-the-day-breast-cancer\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NCLEX-RN\u00ae Question of the Day: Breast cancer - Osmosis Blog\" \/>\n<meta property=\"og:description\" content=\"What does it mean when abnormal breast cells cross the thin barrier that once contained them? 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