Question 1114
{"accessible":false,"alternatives":[{"id":5568,"text":"absence of lung parenchymal calcification"},{"id":5569,"text":"elevation of the hila"},{"id":5567,"text":"mediastinal lymph node calcification"},{"id":5571,"text":"occupational history of mining"},{"id":5570,"text":"pulmonary nodules"}],"archived":false,"correctAlternativeId":5568,"explanation":"\u003cp\u003e\u003ca href=\"/articles/progressive-massive-fibrosis\"\u003eProgressive massive fibrosis\u003c/a\u003e appears as\u0026nbsp;conglomerate mass-like opacities within the upper zones with volume loss and elevation of the hila due to fibrosis. It can be caused by \u003ca href=\"/articles/silicosis\"\u003esilicosis\u003c/a\u003e (or other less common pneumoconioses) or \u003ca href=\"/articles/sarcoidosis-1\"\u003esarcoidosis\u003c/a\u003e. Both silicosis and sarcoidosis often result in mediastinal lymph node calcification and pulmonary nodules, however lung parenchymal calcification is a prominent feature only in silicosis and is rarely present in sarcoidosis, and therefore this can be a very useful feature in distinguishing between the two causes. An occupational history of mining would favor silicosis.\u0026nbsp;\u003c/p\u003e","id":1114,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1114","nextQuestionPath":null,"relatedArticles":[{"id":12513,"title":"Silicosis","link":"/articles/silicosis?lang=us"},{"id":2019,"title":"Sarcoidosis","link":"/articles/sarcoidosis-1?lang=us"},{"id":5146,"title":"Sarcoidosis (thoracic manifestations)","link":"/articles/sarcoidosis-thoracic-manifestations-2?lang=us"}],"alsoUsedIn":[{"id":233,"kind":"RestrictedPage","title":"Page 233 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/233"},{"id":238,"kind":"Course","title":"Radiology Review Course - Melbourne - page 238","link":"https://radiopaedia.org/courses/radiology-review-course-melbourne-2019/pages/238"},{"id":238,"kind":"Course","title":"Radiology Review Course - Melbourne - page 238","link":"https://radiopaedia.org/courses/radiology-review-course-melbourne-2018/pages/238"},{"id":238,"kind":"Course","title":"Radiology Review Course - Melbourne - page 238","link":"https://radiopaedia.org/courses/radiology-review-course-melbourne-2020/pages/238"},{"id":238,"kind":"Course","title":"Chest Imaging Lecture Package - page 238","link":"https://radiopaedia.org/courses/chest-imaging-lecture-package/pages/238"},{"id":238,"kind":"Course","title":"Lectures by Miranda Siemienowicz - page 238","link":"https://radiopaedia.org/courses/lectures-by-miranda-siemienowicz/pages/238"},{"id":238,"kind":"Course","title":"Radiology Review Course - page 238","link":"https://radiopaedia.org/courses/radiology-review-course-online/pages/238"},{"id":632,"kind":"Course","title":"Radiopaedia 2020 - Lectures Only - page 632","link":"https://radiopaedia.org/courses/radiopaedia-2020-exclusive/pages/632"},{"id":632,"kind":"Course","title":"2020 Virtual Conference Private Use - page 632","link":"https://radiopaedia.org/courses/2020-virtual-conference-private-use/pages/632"}],"stem":"\u003cp\u003eIn\u0026nbsp;the setting of progressive massive fibrosis pattern on CT, which of the following\u0026nbsp;would most strongly favor sarcoidosis\u0026nbsp;over silicosis as the underlying cause?\u0026nbsp;\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1114"}],"attemptsPercentages":[{"alternativeId":"5568","percentage":70},{"alternativeId":"5570","percentage":6},{"alternativeId":"5569","percentage":4},{"alternativeId":"5567","percentage":14},{"alternativeId":"5571","percentage":6}],"promptToLogin":false,"questionManager":false,"articleId":"progressive-massive-fibrosis"}