Ace the Neurosonology Challenge 2026 – Sound Waves to Success!

Four parathyroid glands are typically present. They sit on the posterior surface of the thyroid, usually two superior and two inferior. This four-gland arrangement comes from their embryologic origin and migration from the pharyngeal pouches to their final position. While most individuals have four, variations can occur, such as supernumerary glands or occasional absence of one or more, but four is the standard count.