Final answer:
For a solitary bone lesion in LCH, the preferred treatment is surgery, aimed at removing the entire tumor and potentially nearby lymph nodes, with the possibility of curing the localized cancer or at least providing symptom relief.
Step-by-step explanation:
The treatment of choice for a solitary bone lesion in Langerhans cell histiocytosis (LCH) is surgery. When dealing with an isolated tumor, the goal of surgery is to remove the cancerous mass entirely, which can often include the excision of nearby lymph nodes. This is particularly effective if the cancer has not spread, as it may result in a cure. However, even in cases where the cancer has spread, surgery can still provide symptom relief and potentially extend survival.