Hello,  i am new to do this forum, thought i would come here to try and get other peoples experiences and perspectives.

For two years i had this small luml under the skin, back of knee, think its called the popliteal fossa. I found it whilst having a bath, i regret not goung doctors sooner, but life got in the way and i didnt do anything about it.

Anyway fast forward to around 4 months ago, the said lump had noe come out of skin, it protrudes, looks like a small nipple. I went to see my GP, she took photos and sent to dermatology for advice and guidance.

Less than 24 hours later had a phone call from doctor saying dermatolkgy dont know what it is and she has scheduled me under 2WW pathway. I am concerned it could be BCC or SCC, then another part of me thinks skin tag or something benign, my mind is doing cartwheels.

Is it possible for a derm to look at initial pictures and not know? I am having more pictures taken with specialist camera, think its a dermascope. 

Any experiences?