One learned soul held rahu responsible because rahu stands for poison another pointed at sixth lord being in 6th ,8th ,10th and 12th ,yet another held mars,Saturn aspect ( the hard aspect as he called it) responsible ,western astrology as usual pointed at uranus .
So i decided to do some data searching of my own and found out the following common elements present in cancer patient charts .
Conjunction of Sat with moon or venus.
Saturn and mars aspect or vice versa
Malefic lord of 6th in ,6th,8th 10th or 12th.
Lord of 6th in 6th ,8th 1oth and 12th.
Jupiters aspect on waning moon .
Moon and venus aspect on each other.
Aspect of saturn on moon or venus.
Venus or moon in Rahu ,ketu axis aspected by saturn ,mars or jupiter.
I found that venus played a significant role in most charts.
Another factor was that in most of charts you had two or more of above listed combinations so no single combination is responsible for the dreaded disease.
Dear readers the ball does not stop here you need to check D9, D30 ,D6,D12and D3 to further look for clues.
Last but least do the kota chakra scan of transit analysis of nakshatras.
Will add on to this with example charts and analysis.