Hi Halina,
Cancer-axis is Neptune-Pluto.
In this example: Joe Jackson
Progressed Lunar Return for 22 June 2018 (Harmonic 16)
Lunar Sun = Lunar Neptune / Pluto = Lunar Mars / Saturn
Cancer Diagnosis is :
Lunar Mercury / Jupiter = Natal Neptune / Pluto
Solar Return for 22 June 2018 (Harmonic 16)
Solar Neptune / Pluto = Natal Sun
Solar Saturn / Neptune = Natal Saturn / Neptune = Natal Neptune / Pluto
In Natal he has:(Harmonic 16)
Neptune / Pluto = Saturn / Neptune
Body parts that Saturn responsible are endangered, because in natal is Saturn on Neptune/Pluto axis.
According to Chinese Medicine, Saturn is pancreas.
My Research is here :
https://archive.org/details/AstrologicalResearchCancerDiseaseslinchi