pigmented lesions of oral mucosa.pdf

varix
ETIOLOGY
Pathologic dilatations of veins or venules
represent a degenerative change in the adventitia of the
venous wall
Clinical features
the chief site is the ventral tongue
Lingual varicosities appear as tortuous serpentine blue,
red, and purple elevations that course over the
ventrolateral surface of the tongue, with extension
anteriorly.
on the lower lip, appearing as a focal raised
pigmentation
no clinical consequence. They are painless and are not
subject to rupture and hemorrhage
Diagnosis
The varix resembles the hemangioma both clinically
and histologically, yet it is distinguished by two
features :
(1) the patient’s age
(2) its etiology
Angiosarcoma
not related to human immunodeficiency virus (HIV)
can arise anywhere in the body.
the oral cavity is an extremely rare site for such tumors
Kaposi’s Sarcoma
ETIOLOGY
A proliferation of endothelial cells producing a mass.
The factors have been proposed in the development of
this tumer:
Genetic predispostion
Environmental factors
Infection