Describe the specific medical condition of the doctor's nephew from Malegaon and the failure of conventional treatments.

According to Chapter 34, the nephew of a doctor in Malegaon was afflicted with a bone-cyst, referred to as Hadyavarn. This was described as a most difficult and extraordinary malady. The severity of the condition is highlighted by the fact that numerous treatments were attempted without success. The boy's own uncle was a degree-holding physician, and he consulted other expert and intelligent surgeons, but they all felt exhausted and helpless. The text states that all native and foreign treatments were tried, and even surgery was attempted, but nothing succeeded in alleviating the young boy's suffering. This failure of all available medical expertise underscores the seemingly incurable nature of the disease before the family sought Sai Baba's intervention.