Signal

Objective evidence of disease perceptible to the examining practitioner (sign) and subjective evidence of disease perceived by the patient (symptom).

A system of hand gestures used for communication.

In medicine, a sign is something found during a physical exam or from a laboratory test that shows that a person may…

Removal of tissue from the sigmoid colon for microscopic examination, using an endoscope.

Examination of the lower colon using a sigmoidoscope, inserted into the rectum. A sigmoidoscope is a thin, tube-like instrument with a light…

A thin, tube-like instrument used to examine the inside of the colon. A sigmoidoscope has a light and a lens for viewing…