John Thomas sign
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The John Thomas sign, also known as the Throckmorton sign, is the position of a penis as it relates to pathology on an x-ray of a pelvis. When the penis (visible on the x-ray as a shadow) points towards the same side as a unilateral medical condition (such as a broken bone), this is considered a "positive John Thomas sign", and if the shadow points to the other side, it is a negative John Thomas sign. This sign is of no medical significance and is employed as a humorous aside.[citation needed]
References
- Merlin C. Thomas, Brett D. Lyons, Robert J. Walker John Thomas sign: common distraction or useful pointer? Letter. The Medical Journal of Australia, Sydney, 1998, 169: 670 [1]
External Links
Throckmorton Sign An actual Throckmorton Sign
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
