10th August 2020

A 34-year-old female patient has come in with an itchy rash which has become more pronounced in colour and size

A 34-year-old female patient has come in with an itchy rash which has become more pronounced in colour and size. It started as a small area which has become more purple in colour and grown to engulf the dorsal aspect of her left forearm. Now she is worried because a small eruption has grown that is filled with fluid. Another one has since appeared which has a small tinge of blood. She is extremely worried that this could be skin cancer because there is a family history of melanoma. The blister is tense and difficult to pop. One has popped and healed to leave no scar. 

For the patient above, please select the SINGLE most likely diagnosis. Select ONE option from the list above.