Can you describe the specific ailment of the boy from Malegaon and the medical efforts that failed?

According to the detailed account in Chapter 34, the boy suffered from a bone-cyst, referred to as Hadyavarn. This condition was described as a "most difficult and extraordinary malady" that caused the young boy immense pain and distress. The medical efforts to cure him were extensive because his own uncle was a degree-holding doctor. He, along with his physician friends and "expert and intelligent surgeons," attempted a wide range of treatments. The text specifies that "all native and foreign treatments were tried" and "all efforts were exhausted." They even resorted to surgery, but it was unsuccessful, leaving the medical professionals feeling helpless against the disease.