Conversation: The conversation between human and AI assistant.
[|Human|] My father has malignant melanoma and has recently undergone the gamma knife for his brain mets. Today he woke up with multiple blueish black lesions on the skin under the arm that he originally had surgery on for the infected lymph nodes 18 months ago. He has no pain there, but they were not there yesterday. Is this more mets?
[|AI|]  Thanks for your question on Chat Doctor. I can understand your concern. Yes, possibility of metastasis is more. Malignant melanoma is known to cause skin metastasis and maxilla is common site for metastasis. So bluish black skin lesions can be due to skin metastasis. So get done clinical examination and if needed biopsy of the lesion to rule out metastasis. Hope I have solved your query. I will be happy to help you further. Wishing good health to your father. Thanks.