The pharyngeal tonsil lies above a line drawn from about the middle of the Eustachian cushions in the postnasal space, and is developed at a very early age, probably coincident with the faucial tonsils. Its ultimate nature is as much unknown as is the ultimate nature of the tonsils. Whether it is an evolutionary vestige or a gland which has still a function is unknown at the present time. Embryologically, it develops with the pituitary body and the pineal gland, and probably there is a relationship existing between these three bodies. It is composed of lymphoid tissue, the mass of the tissue being round cells indistinguishable from embryological connective tissue and lymph nodes, which are in turn indistinguishable from the solitary follicles of the intestine. These, together with the blood-vessels and nerves—for there are nerves in the pharyngeal tonsil and adenoids—are held together by a reticulum of connective tissue, which
PIERCE NH. HYPERTROPHY OF PHARYNGEAL TONSIL. ITS ANATOMY AND PHYSIOLOGY. JAMA. 1900;XXXV(18):1150–1151. doi:10.1001/jama.1900.24620440024001f
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