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Caviar tongue is a condition characterized by the purplish nodular swelling of veins found on the undersurface of the tongue. [1]It is normal for there to be veins visible underneath the tongue, partly because the mucous membrane is so thin and translucent in this region, but where these vessels become dilated and tortuous, they may appear round and black like caviar. [2]
The lingual veins are multiple veins of the tongue with two distinct courses: one group drains into the lingual artery; another group drains either into the lingual artery, (common) facial vein, or internal jugular vein. [1]
A venous lake (also known as phlebectasis [1]) is a generally solitary, soft, compressible, dark blue to violaceous, 0.2- to 1-cm papule commonly found on sun-exposed surfaces of the vermilion border of the lip, face and ears. [2] [3] [4] Lesions generally occur among the elderly. [5] [6]
They are abnormal clusters of closely packed, thin-walled blood vessels that usually form caverns. The lesions contain slow-moving or clotted blood. Lesions in the brain and spinal cord are particularly fragile and likely to bleed. [8] Drawing of a microcystic lymphangioma on the left side of a boy's tongue
The deep lingual artery (or ranine artery) is the terminal portion of the lingual artery after the sublingual artery is given off.As seen in the picture, it travels superiorly in a tortuous course along the under (ventral) surface of the tongue, below the longitudinalis inferior, and above the mucous membrane.
Typically, regions such as the cheeks, lips, and parts of the hard palate contain submucosa (a layer of loose fatty or glandular connective tissue containing the major blood vessels and nerves supplying the mucosa). The submucosa's composition determines the flexibility of the attachment of oral mucosa to the underlying structures.
Lingual tonsils are covered externally by stratified squamous epithelium (nonkeratinized) that invaginates inward forming tonsillar crypts.Beneath the epithelium is a layer of lymphoid nodules containing lymphocytes.
There are three distinct types of lymphangioma, each with their own symptoms. They are distinguished by the depth and the size of abnormal lymph vessels, but all involve a malformation of the lymphic system. Lymphangioma circumscriptum can be found on the skin's surface, and the other two types of lymphangiomas occur deeper under the skin.