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There are some features in serious tumours or tumours which are known as malignant in comparison to Benign tumours.The malignant tumours are fixed to surrounding skin or subcutaneous tissue or muscles.These are generally not mobile.They grow at a faster rate .There are enlarged lymph nodes so draining area.Overlying skin may be red or shiny.The margins of swelling are irregular .
These features of malignant swelling are generally not found with benign swelling.
Hope this all will help you.
Feel free to discuss further,
Patient replied :
These are things that I already am aware of. If the "knot" in my muscle above my shoulder blade were a malignant tumor, would it be visible lump? There is no visible swelling. Just that the physical therapist feels a knot. If not for the physical therapist finding it, I would not have known anything was there. Do things like soft tissue cancers present themselves as a visible lump?
This all depend on size and site of tumor.If tumor is deep and small then it can not be visible.It is the rapid enlargement that makes it visible. If tumor size is small but the location is superficial it becomes visible as lump.
Hope that answers your question