1.   Shannon suffers from a rare form of cancer.

2.   He contracted a rare form of cancer.

3.   Natalie is dying from a rare form of cancer that has attacked her nervous system and is spreading to her bones.

4.   He became unwell and was found to have contracted a rare form of food poisoning that attacks the kidneys.

5.   There is a rare form of lung cancer, distinguishable from the usual type only under the microscope.

6.   It is found that people with the rare form are no more likely to be smokers than are those with no lung cancer.

7.   Already, the technique has revealed the presence of a rare form of electrically charged molecular hydrogen.

8.   An autopsy reveals Olivia had already been doomed by a rare form of brain cancer.

9.   And scientific reports say that antibiotics appear to cure one rare form of stomach cancer.