Thyroid nodule, ultrasound scan
Ultrasound scan showing a nodule in the left thyroid lobe of a 28 year old female patient. The nodule measures 51 mm across on its long axis and 31 mm on the anteriorposterior axis. Thyroid nodules are solid or fluid-filled lumps that form in the thyroid, a small gland located at the base of the neck. Most thyroid nodules aren't serious and cause symptoms. A small percentage of thyroid nodules can be cancerous., by ZEPHYR/SCIENCE PHOTO LIBRARY
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