JAMA. 1916;LXVI(11):816-817. doi:10.1001/jama.1916.02580370036019.
Text Size: A A A
Published online

New growths, to all intents and purposes the equivalent of malignant tumors in man, occur in many animals. There are points in connection with some growths of this kind in animals which suggest that they may be of infectious nature. By way of illustration may be mentioned the remarkable chicken sarcoma studied by Peyton Rous, apparently perfectly sterile and cell-free filtrates of the tissue of which, when injected into chickens, produce sarcomatous growths identical with the original growth. What could be more reasonable than to conclude that this growth is caused by a filterable virus, and that it is an infectious growth? The "virus" in question, however, does not correspond to other living viruses in all characteristics; it has not been possible to secure any evidence that it multiplies independently of the tumor cells, and there are no indications that the growths from which it is obtained ever spread by


Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

First Page Preview

View Large
First page PDF preview




Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).


Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.