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The Thyroid Gland Anatomy of the thyroid gland The thyroid gland is found in the front of the neck. It sits below the voice box (larynx) and on top of the trachea (windpipe). It has a butterfly-like shape. The small, 2-inch gland consists of 2 lobes, 1 on each side of the

Overview of Neck Masses in Children What are neck masses? Neck lumps (masses) are common problems in babies and children. Some neck masses are present at birth (congenital). They result from abnormal formation that occurs in the early stages of an unborn baby's development. Many

Diagnosis of Cystic Fibrosis How is cystic fibrosis diagnosed? Newborns are screened for cystic fibrosis (CF) as part of each state's newborn screening program. If the results are positive, it does not mean your baby has cystic fibrosis. More tests are done as described below. In

Common Breast Conditions Click on the links below to learn about common breast conditions. Mastalgia (Breast Pain) Common Benign Lumps Fibrocystic Breast Changes Nipple Problems and Discharge Breast Infections and Inflammations Diagnosing Benign Breast Conditions© 2000-2025 The

Allergens: Pollen What is pollen? Pollen is the tiny egg-shaped male cells of plants, including trees, grasses, and weeds. Pollen is microscopic in size. It is the most common cause of hay fever (seasonal allergic rhinitis). Which plants produce pollen that cause allergic

Amenorrhea in Adolescents and Teens What is amenorrhea? Amenorrhea is a menstrual condition characterized by absent menstrual periods for more than 3 monthly menstrual cycles. Amenorrhea may be classified as primary or secondary: Primary amenorrhea. From the beginning and may be