An increase in the transradiancy of a part of a lung may be due to a giant cyst or bulla, compensatory or obstructive emphysema, or a decrease in the pulmonary blood flow. Such a change in blood flow may result from pulmonary embolism and less frequently from thrombosis of the pulmonary artery. On rare occasions, congenital absence or hypoplasia of the pulmonary artery with or without intracardiac anomaly and compression of the artery by a mediastinal mass can cause diminished perfusion of the lung.
In 1953, Swyer and James1 reported, under the partial title "Unilateral Pulmonary Emphysema," the case of a 6-year-old boy with recurrent bronchitis and bronchiolitis and a hyperlucent lung. Pulmonary angiograms revealed a hypoplastic right pulmonary artery, but hypoplasia was not demonstrable in the resected lung. There was, however, widespread obliteration of the peripheral lung capillaries and bronchitis with bronchiolitis. The authors presumed a functional in
Thank you for submitting a comment on this article. It will be reviewed by JAMA Internal Medicine editors. You will be notified when your comment has been published. Comments should not exceed 500 words of text and 10 references.
Do not submit personal medical questions or information that could identify a specific patient, questions about a particular case, or general inquiries to an author. Only content that has not been published, posted, or submitted elsewhere should be submitted. By submitting this Comment, you and any coauthors transfer copyright to the journal if your Comment is posted.
* = Required Field
Disclosure of Any Conflicts of Interest*
Indicate all relevant conflicts of interest of each author below, including all relevant financial interests, activities, and relationships within the past 3 years including, but not limited to, employment, affiliation, grants or funding, consultancies, honoraria or payment, speakers’ bureaus, stock ownership or options, expert testimony, royalties, donation of medical equipment, or patents planned, pending, or issued. If all authors have none, check "No potential conflicts or relevant financial interests" in the box below. Please also indicate any funding received in support of this work. The information will be posted with your response.
Some tools below are only available to our subscribers or users with an online account.
Download citation file:
Web of Science® Times Cited: 4
Customize your page view by dragging & repositioning the boxes below.
More Listings atJAMACareerCenter.com >
Enter your username and email address. We'll send you a link to reset your password.
Enter your username and email address. We'll send instructions on how to reset your password to the email address we have on record.
Athens and Shibboleth are access management services that provide single sign-on to protected resources. They replace the multiple user names and passwords necessary to access subscription-based content with a single user name and password that can be entered once per session. It operates independently of a user's location or IP address. If your institution uses Athens or Shibboleth authentication, please contact your site administrator to receive your user name and password.