Hemangioma originally described any vascular tumor-like structure, whether it was present at or around birth or appeared later in life. Mulliken et al. categorized these conditions into two families: one of self-involuting tumors, growing lesions that eventually disappear, and another of malformations, enlarged or abnormal vessels present at birth and essentially permanent. The importance of this distinction is that it makes it possible for early-in-life differentiation between lesions that will resolve versus those that are permanent.
Signs and symptoms : If they are on the surface of the skin, they are reminiscent of a ripe strawberry (hence, they are sometimes referred to as "strawberry hemangiomas"). If they are just under the skin they present as a bluish swelling. Sometimes they grow in internal organs such as the liver, larynx, or small and large intestines.In most cases, hemangiomas will disappear over time. Some are formed during gestation and are called congenital hemangiomas; the most common (infantile hemangiomas) appear during the first few weeks of life.
Causes : The cause of hemangioma is currently unknown; however, several studies have suggested the importance of estrogen signaling in hemangioma proliferation. In 2007, a paper from the Stanford Children's Surgical Laboratory revealed that localized soft tissue hypoxia coupled with increased circulating estrogen after birth may be the stimulus.
Statistics: A prospective study of extra and intraoral biopsies diagnosed and processed at the School of Odontology of the Technological University of Mexico (UNITEC) in its various service units, within a two and a half year period covering from January 1986 to May 1988. Out of 12,456 patients, 73 biopsies and 7 exfoliative cytologies were performed, with 41 different lesions detected. The clinical features of the five conditions most frequently found in the study are emphasized and compared with findings reported in international literature regarding the same lesions.