Hi,
A progressed and solar return chart without natal chart configurations is not so helpful. The astro. com. facilities that produces a chart with natal AND progressions configurations would be.
Did the skin cancer flare up within the last few years? There could be a connection between Mars' long term transit through Virgo and into Libra, where it conjoined Saturn's long-term transit through Libra. Both Virgo and Libra are associated with the skin, whilst Saturn through it rulership of Capricorn, the outer skin in general, can act through its function as 'the protective layer' that may not have been working as is its intent.