Table 2. Localized Pigmented Surface Lesions of Oral Mucosa
|INTRAVASCULAR BLOOD LESIONS|
Usually blanch on pressure and compressible
|Varix||Blue; thickened; sometimes does not blanch due to thrombosis.|
|Hemangioma||Congenital; thickened; red or blue|
|Kaposi sarcoma||Patient is immunocompromised; may be thickened or flat.|
|EXTRAVASCULAR BLOOD LESIONS|
Do not blanch; present for less than 1 month; may have history of injury or bleeding problem.
|Hematoma||Thickened; firm to palpation.|
|Petechiae||Focal and pinpoint size; red; multiple; not thickened|
Persistent; do not blanch
|Ephelis (freckle)||Not thickened; located on sun-exposed surfaces.|
|Oral melanotic macule||Not thickened; located on mucosa not exposed to sun|
|Nevus||Thickened; may be flat early in development|
|Melanoma||Thickened; may be flat early in development|
Do not blanch; may be history of injury; radiopaque object sometimes seen on radiograph; may be thickened or flat.