Do you have data with no cancer? It's going to require careful treatment of the categories with only one example, but one-shot learning is a topic of great research that describes this problem exactly. Starting there should be helpful.

Also, you have "transistional" and "transitional" listed with 1 each- if that typo is in the original data, you should fix that! And then you'll have 2 examples.

Unfortunately, the answer here may be "acquire more data", because you have many categories for the total samples you have as well as multiple with 1 example only.