Pt. Visti Larsen's Commentary:
It is no surprise that four versions of this śloka exist in the six different works. Firstly, the subsequent principle for roga in śloka 9 is with little or no practical difference to that given here in Sharma and Santhanam's work. Notably, that same 9th śloka is undisputed. Secondly, the same principle by Sharma and Santhanam does not clearly suit the examples of Vraṇa & Kuṣṭharoga given by Parāśara (refer to Śloka 15th & 18th). This must have been observed by the authors of these different ślokas, thus bringing their differences. Of these ślokas, those compiled by Giridhari Lal and Tara Chandra are the most unlikely due to the reference to the tenth house. The Sharma/Santhanam version suggests wounds due to the sixth lord in own sign in the sixth house and strong, which goes against our expectations, where all suffering should imply a poor position of the given grahas. This leaves the version collected by Suresh Mishra as the most likely, where that of Ganesh Pathak is similar: Malefic influence on the sixth lord, whilst situated in Lagna or eighth house brings wounds in the body. All but Giridhar/Tara agree that the limb of the wound is examined from the sixth house.
However, whilst having deduced a more likely śloka, we have yet to solve the examples given by Parāśara. One particular śloka 14 of Jvararoga, or acute fever, is given as: "Mars in the sixth house as the sixth lord is placed in the eighth house". This śloka suits our interpretation of Kanthavraṇa (wound to throat), however, the result is Jvararoga (acute fever) instead. We as readers can therefore not differentiate between Roga and Vraṇa with the ślokas given thus far. Here this scribe offers the following opinion based on the examples Parāśara has given: All but one example śloka of Roga involve the first or eighth house, whereas none of the Vraṇa and Kuṣṭharoga examples involve these two houses. Therefore, it is likely that all Roga must involve the first or eighth house whereas Vraṇa will not. Further, the outlier śloka on Roga is related to Gulmaroga or enlargement of the spleen, which can be accepted as cancer and tumors do fall under the category of Vraṇa. Adding the concept of Kuṣṭharoga, which is again a type of Vraṇa, we understand that this also demands the Lagna's involvement, and again can conclude that all Roga is under the domain of the first and eighth houses, as Vraṇa is isolated to the sixth house. Whenever the sixth mixes with the other two, then it becomes Roga instead.