Period 5 element dimethyl telluride, (CH)Te, a gas with a garlic-like odor which is exhaled in the breath of victims of tellurium toxicity or exposure. Iodine is the heaviest essential element utilized widely by life in biological functions (only tungsten, employed in enzymes by a few species of bacteria, is heavier). Iodine's rarity in many soils, due to initial low abundance as a crust-element, and also leaching of soluble iodide by rainwater, has led to many deficiency problems in land animals and inland human populations. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities. Iodine is
Pseudo-goitre Pseudo-goitre Pseudo-goitre is the apparent fullness of the front part of the neck. It may be mistakenly diagnosed as thyroid enlargement. The cause for pseudogoitre can be fat tissue of the neck, cervical lordosis, cervical masses (such as cervical lymphadenopathy, branchial cleft cyst, pharyngeal diverticulum) or high lying thyroid or trachea. Pseudogoitre due to cervical lordosis (swan shaped-neck) is called Modigliani syndrome after the artist Amedeo Modigliani, who was famous for painting women with exaggerated curved neck. Pseudogoitre can be distinguished from other disease conditions of the neck by physical examination. Normal thyroid moves up with swallowing, and any structure