{"id":2689,"date":"2023-06-28T03:26:00","date_gmt":"2023-06-28T03:26:00","guid":{"rendered":"https:\/\/www.osmosis.org\/blog\/?p=2689"},"modified":"2025-10-01T11:39:32","modified_gmt":"2025-10-01T19:39:32","slug":"usmle-step-1-question-of-the-day-personality-disorders","status":"publish","type":"post","link":"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders","title":{"rendered":"USMLE\u00ae Step 1 Question of the Day: Personality disorders"},"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\/usmle-step-1-question-of-the-day-personality-disorders\/#The_correct_answer_to_todays_USMLE%C2%AE_Step_1_Question_is%E2%80%A6\" >The correct answer to today&#8217;s USMLE\u00ae Step 1 Question is&#8230;<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders\/#B_Paranoid_personality_disorder\" >B. Paranoid personality disorder<\/a><\/li><\/ul><\/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\/usmle-step-1-question-of-the-day-personality-disorders\/#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\/usmle-step-1-question-of-the-day-personality-disorders\/#A_Schizoid_personality_disorder\" >A. Schizoid personality disorder<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders\/#C_Schizotypal_personality_disorder\" >C. Schizotypal personality disorder<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders\/#D_Borderline_personality_disorder\" >D. Borderline personality disorder<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders\/#E_Obsessive-compulsive_personality_disorder\" >E. Obsessive-compulsive personality disorder<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders\/#Main_Explanation\" >Main Explanation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders\/#Major_Takeaway\" >Major Takeaway<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders\/#References\" >References<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-personality-disorders\/#i\" >&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;________________________<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\"><strong><em>This week, we are sharing another USMLE\u00ae Step 1-style practice question to test your knowledge of medical topics.&nbsp;<\/em><\/strong><strong><em>Today&#8217;s case focuses on<\/em><\/strong><strong><em>&nbsp;a 25-year-old man presents to the office due to a suspicion of being poisoned. The patient is suspicious that his neighbors have been tampering with his food lately and that they may have poisoned him. When the physician states that there are no signs or symptoms of poisoning, the patient becomes suspicious of the physician, asking if they are secretly working with his neighbors.&nbsp;<\/em><em>Can you figure it out?<\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A 25-year-old man presents to the office due to a suspicion of being poisoned. The patient states that when he left for work this morning, he was certain that he had closed the door of the refrigerator. However, upon returning home, he saw that the refrigerator was slightly open. The patient is suspicious that his neighbors have been tampering with his food lately and that they may have poisoned him. He states that he suspects that his neighbors have been trying to break into his house and steal things ever since he moved here. He has tried multiple times to get them evicted from the building and expresses concern that \u201cNow they\u2019re trying to get their revenge.\u201d When the physician states that there are no signs or symptoms of poisoning, the patient becomes suspicious of the physician, asking if they are secretly working with his neighbors. Which of the following is the most likely diagnosis in this patient?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. Schizoid personality disorder<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. Paranoid personality disorder<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. Schizotypal personality disorder<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. Borderline personality disorder<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>E. Obsessive-compulsive personality disorder<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Scroll down for the correct answer!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_correct_answer_to_todays_USMLE%C2%AE_Step_1_Question_is%E2%80%A6\"><\/span>The correct answer to today&#8217;s USMLE\u00ae Step 1 Question is&#8230;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"B_Paranoid_personality_disorder\"><\/span>B. Paranoid personality disorder<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Before we get to the Main Explanation, let&#8217;s look at the incorrect answer explanations. Skip to the bottom if you want to see the correct answer right away!<\/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<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_Schizoid_personality_disorder\"><\/span>A. Schizoid personality disorder<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong>&nbsp;Individuals with schizoid personality disorder typically present with voluntary social withdrawal and limited emotional expression. This patient\u2019s pattern of distrust and suspiciousness of others is consistent with a different diagnosis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C_Schizotypal_personality_disorder\"><\/span>C. Schizotypal personality disorder<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:&nbsp;<\/strong>Schizotypal personality disorder is characterized by eccentric appearances, interpersonal awkwardness, as well as odd\/magical thinking. This patient\u2019s pattern of distrust and suspiciousness of others is consistent with a different diagnosis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"D_Borderline_personality_disorder\"><\/span>D. Borderline personality disorder<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:&nbsp;<\/strong>Individuals with borderline personality disorder typically have a history of instability with interpersonal relationships, self-image, and impulse control. This patient\u2019s pattern of distrust and suspiciousness of others is consistent with a different diagnosis.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"E_Obsessive-compulsive_personality_disorder\"><\/span>E. Obsessive-compulsive personality disorder<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:&nbsp;<\/strong>Obsessive-compulsive personality disorder is characterized by a consistent pattern of preoccupation with orderliness, perfectionism, and control. This patient\u2019s distrust and suspiciousness of others is consistent with a different diagnosis.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Main_Explanation\"><\/span><strong>Main Explanation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This patient demonstrates a chronic and pervasive pattern of distrust and suspiciousness; these symptoms are characteristic of\u00a0<strong>paranoid personality disorder\u00a0<\/strong>(PPD).\u00a0PPD is a\u00a0<strong>cluster A personality disorder<\/strong>\u00a0that is characterized by\u00a0<strong>generalized distrust and suspiciousness<\/strong>. Individuals with PPD tend to view others\u2019 actions as hostile and will often bear grudges. Patients with PPD often lead guarded lives, which can be associated with other disorders such as schizoid personality disorder. There appears to be an epidemiological link between the cluster A personality disorders (paranoid, schizoid, and schizotypal) and\u00a0<strong>schizophrenia<\/strong>. However, patients with cluster A disorders do not have persistent psychotic symptoms \u2013 though during periods of stress, patients with PPD may develop brief psychotic episodes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" height=\"1024\" width=\"961\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_7ebdc4.png?w=961\" alt=\"table about different clusters of personality disorder\" class=\"wp-image-2691\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_7ebdc4.png 1076w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_7ebdc4.png?resize=282,300 282w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_7ebdc4.png?resize=768,818 768w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_7ebdc4.png?resize=961,1024 961w\" sizes=\"auto, (max-width: 961px) 100vw, 961px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Major_Takeaway\"><\/span>Major Takeaway<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Paranoid personality disorder&nbsp;<\/strong>(PPD) is a&nbsp;<strong>cluster A personality disorder<\/strong>&nbsp;that is characterized by generalized distrust and suspiciousness. Individuals with PPD tend to view others\u2019 actions as hostile and will often bear grudges.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"References\"><\/span><strong>References<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Geringer &nbsp;ES, Stern &nbsp;TA. Coping with medical illness: the impact of personality types. Psychosomatics 1986;27:251\u2013261.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"i\"><\/span><strong><em>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;________________________<\/em><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>Want more USMLE\u00ae Step 1 practice questions? Try Osmosis today! Access your\u00a0<em><strong><a href=\"https:\/\/www.osmosis.org\/login?type=create\" target=\"_blank\" rel=\"noreferrer noopener\">free trial<\/a><\/strong><\/em>\u00a0and find out why millions of current and future clinicians and caregivers love learning with us.<\/strong><\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.osmosis.org\/ultimate-guide\/usmle-step-1\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"250\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_b61ad5.png\" alt=\"Osmosis sign up ad\" class=\"wp-image-2692\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_b61ad5.png 700w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_b61ad5.png?resize=300,107 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.osmosis.org\/ultimate-guide\/usmle-step-1\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em><sub>The United States Medical Licensing Examination (USMLE\u00ae) is a joint program of the Federation of State Medical Boards (FSMB\u00ae) and National Board of Medical Examiners (NBME\u00ae). Osmosis is not affiliated with NBME nor FSMB.&nbsp;<\/sub><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This week, we are sharing another USMLE\u00ae Step 1-style practice question to test your knowledge of medical topics.&nbsp;Today&#8217;s case focuses on&nbsp;a 25-year-old man presents to the office due to a suspicion of being poisoned. The patient is suspicious that his neighbors have been tampering with his food lately and that they may have poisoned him. [&hellip;]<\/p>\n","protected":false},"author":202,"featured_media":2690,"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":[27,20,1369,44],"tags":[],"class_list":["post-2689","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-medicine","category-exam-prep","category-step-1-questions","category-step-1"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>USMLE\u00ae Step 1 Question of the Day: Personality disorders - 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\/usmle-step-1-question-of-the-day-personality-disorders\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"USMLE\u00ae Step 1 Question of the Day: Personality disorders - Osmosis Blog\" \/>\n<meta property=\"og:description\" content=\"This week, we are sharing another USMLE\u00ae Step 1-style practice question to test your knowledge of medical topics.&nbsp;Today&#8217;s case focuses on&nbsp;a 25-year-old man presents to the office due to a suspicion of being poisoned. The patient is suspicious that his neighbors have been tampering with his food lately and that they may have poisoned him. 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