What specific disease is mentioned in Chapter 34, and why was it considered so severe?

The ailment highlighted in Chapter 34 of the Shri Sai Satcharitra is a bone-cyst, referred to by its specific name, Hadyavran. The text emphasizes its severity by describing it as a "most difficult and extraordinary malady." Its severity was underscored by the fact that it caused unbearable pain for the young nephew of the Malegaon doctor, leaving him distressed and his relatives worried. Furthermore, the disease proved completely resistant to all forms of treatment available at the time. As Chapter 34 recounts, even with the boy's uncle being a doctor and consulting other physicians and expert surgeons, all native and foreign treatments, including surgery, were attempted and failed. The complete inability of the medical community to provide any improvement or cure is what made this ailment so severe and the family's situation so desperate.