Is blue nevus a tumor?
Is blue nevus a tumor?
Malignant blue nevus is a rare form of malignant melanoma. A cellular blue nevus is the precursor lesion. The scalp is the most common site. The tumor often presents clinically as a progressively enlarging or multinodular blue-black lesion.
Is a blue nevus bad?
Blue nevus is an acquired benign melanocytic nevus described as a blue or blue-black, firm papule, nodule or plaque-like lesion occurring on the skin and mucous membranes. Malignant blue nevus is rare, and a common blue nevus rarely needs a differential diagnosis from malignant melanoma.
What does a dermoscopy show?
A dermatoscope is a hand-held visual aid device a doctor or person can use to examine and diagnose skin lesions and diseases, such as melanoma. It can also help a person examine the scalp, hair, and nails. A dermatoscope is a common feature at a dermatologist’s office.
How can you tell if blue nevus is cancerous?
Cancerous nevi may appear as a common or cellular blue nevus but develop at a later age and may start to look like ulcers. They may also have a more nodular or plaque-like form….Other common characteristics are:
- small size.
- round shape.
- raised or flat surface.
- smooth surface.
- size between 1 and 5 millimeters.
What does Blue melanoma look like?
The common blue nevus is usually flat or dome-shaped with a smooth surface. The size can range between 0.5-1cm with the color varying from being blue-gray to blue-black. On the other hand, a cellular blue nevus is larger, at least 1 cm in diameter, and more nodular.
What does a cancerous blue nevus look like?
Cancerous nevi may appear as a common or cellular blue nevus but develop at a later age and may start to look like ulcers. They may also have a more nodular or plaque-like form. Blue nevi can appear in many places on the body and are generally isolated.
Can melanomas be blue?
The term “malignant blue nevus” refers to a rare and heterogeneous group of melanomas that arise in several clinical settings. This includes melanomas arising in association with a common or cellular blue nevus and those arising de novo and resembling cellular blue nevi.
Do all dermatologists use dermoscopy?
The frequency of dermoscopy was evaluated, and it was found that 44 (42.7%) dermatologists used dermoscopy more than once daily, but 44 (42.7%) dermatologists reported never having used dermoscopy.
Is there any treatment for blue nevi melanoma?
Blue nevi are benign lesions and no treatment or follow-up is needed. The history of recent change or the evidence of increase in size or change in structure demonstrated by digital follow up is the clue for not missing melanoma blue nevus like. Malvehy,j, Puig S, Braun R,et al. Handbook of dermoscopy. Taylor and Francis 2009.
How big is a dermoscopy of superficial melanoma?
Dermoscopy of superficial melanoma By the time in situ and invasive superficial spreading melanoma (SSM) is recognised as a changing or distinctive lesion by the patient or their doctor, it is often large (>6mm). Characteristically, superficial melanoma is asymmetrical and irregular in shape and structure.
Is it possible to diagnose amelanotic melanoma by dermoscopy?
Amelanotic melanoma can be difficult to diagnose by dermoscopy. It should be considered if there is history of change within an odd-looking pink lesion. There is nearly always a small amount of focal and irregular pigmentation, often on the periphery of the lesion.
What kind of pigmentation does a blue nevi have?
In contrast with the streaks at the periphery of melanoma or Spitzoid/Reed type melanocytic lesions in blue nevus these structures show a slate-blue pigmentation and are out of focus due to their depth. In the nevus of Ota and nevus of Ito a diffuse irregular blue-brownish pigmentation is the main dermoscopic feature.