What specific example does the Sai Satcharitra give to demonstrate the power of Udi against seemingly incurable ailments?

Chapter 34 of the Shri Sai Satcharitra provides a very specific example to illustrate the majesty of Udi. It narrates the story of a young boy from Malegaon suffering from a bone-cyst, a malady described as most difficult and extraordinary. This disease could not be cured by any remedy, including treatments from his own uncle, who was a doctor, or other expert surgeons. As the chapter explains, after all human efforts were exhausted, the family turned to Sai Baba. He gave them Udi to apply to the wound. The narrative is presented as a prime illustration of how Udi from Sai’s hand could completely uproot the pain of a terrible disease that no other medical or native remedy could touch.