John Thomas Sign
The John Thomas sign, also known as the Throckmorton sign, is a slang or joke term used in the field of radiology. It refers to the position of a penis as it relates to pathology Pathology is the study of the causes and effects of disease or injury. The word ''pathology'' also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in ... on an X-ray of a human pelvis, 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." Studies have shown that the "sign" is no better than chance at identifying the location of a hip fracture. In those cases where the John Thomas sign is positive, it has been proposed that a person with a displaced hip fracture may try to lie on the injure ...
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