Hello @rose830 and welcome to Mayo Clinic Connect. As @californiazebra said, I also had to look up this type of cancer. On Mayo's website, I found this information:
--Merkel Cell Carcinoma
https://www.mayoclinic.org/diseases-conditions/merkel-cell-carcinoma/symptoms-causes/syc-20351030
I would encourage you to read the information (even if you don't understand it all) and at least become familiar with this diagnosis. That way you can ask good questions as you meet with doctors about treatment.

In the first paragraph of the article it says, 'Merkel cell carcinoma is also called neuroendocrine carcinoma of the skin." A couple of paragraphs later it says,

"Merkel cell carcinoma tends to grow fast and to spread quickly to other parts of your body. Treatment options for Merkel cell carcinoma often depend on whether the cancer has spread beyond the skin."

Has a biopsy been done yet?