Re: How fast does nodular melanoma spread?
Nodular Melanoma spreads very fast, and the prognosis is bad.
I can't tell you how fast it's going to spread, as this depends from individual from individual. The bad thing about nodular melanoma, that makes it differ from for example Superficial Spreading Malignant Melanoma, is that Nodular Melanoma spreads vertically, while SSMM spreads horizontally, superficially on the skin.
The reason Nodular Melanoma's way of spreading is dangerous is because it hits blood vessels fast, and therefore metastases to the body very fast, causing cancer in various organs.
Do you suspect nodular melanoma on yourself?
If so, you should see a dermatologist fast. Just to help you out on the way, let me give you a couple of criterias you can analyze it by.
Atypical Nevuses are determined with the ABCDE-rule.
A - Asymmetrical nevus
B - Uneven borders
C - More than one color (Nodular Melanoma can also be blue, and typically black/brown)
D - Diameter bigger than 6mm
E - Evolution, change in size, shape, color, elevation etc.etc.
If your whole body is covered in nevuses that are "atypical" by these criterias, you usually don't have to worry. Some people have nevuses that differ from the standard, and if this is so, you should use the criteria called "The Ugly Duck"
Simply look for nevuses that differ from your other nevuses, and then determine if it's atypical or not.
BUT NOTICE: This is not a criteria that DIAGNOSES cancer, this is simply used to spot atypical nevuses, and microscopical examination is needed for diagnosis of cancer.
I hope this helped.