The phrase "an uncommon form of" is correct and usable in written English.
You can use it to describe something that is not frequently encountered or is rare in a particular context.
Example: "The artist is known for using an uncommon form of sculpture that combines traditional techniques with modern materials."
Alternatives: "a rare type of" or "an unusual kind of".
Prostatic ductal adenocarcinoma is an uncommon form of prostatic carcinoma.
Legionnaires' disease is an uncommon form of pneumonia that could have serious consequences for older people.
In some ways, Erdogan could afford to be callous: hunger strikes are not an uncommon form of protest in Turkey.
Palmar mid-carpal instability (PMCI) is an uncommon form of non-dissociative carpal instability, seldom reported in Asian population.
Samantha Leigh at the University of California, Irvine, and her colleagues fed five captive bonnetheads on seagrass grown in water containing carbon-13, an uncommon form of carbon.
Breast implants made by Allergan that have been linked to an uncommon form of cancer are being taken off the market in Europe, French authorities announced on Tuesday.
CNPA which is a relatively uncommon form of Aspergillus infection, typically occurs as a complication of preexisting chronic lung diseases such as emphysema, sarcoidosis, tuberculosis sequela and other fibrotic lung diseases as well as in mildly immunocompromised patients e.g. diabetes mellitus, chronic liver disease and alcoholism [ 3, 4].
But Brogaard experiences a more uncommon form of the condition, in which fearful thoughts cause an image of a creepy landscape to appear before her eyes. .
About 2,000 people have taken the drug to treat a relatively uncommon form of leukemia that kills about 600 Americans each year.
Thyroid cancer, a fairly uncommon form of cancer in the human population, has causal links to environmental radiation exposures (Meirmanov et al. 2003).
Since then, a number of writers on the subject have taken an even bigger and more questionable leap: they have turned a bizarre and uncommon form of child abuse into a distinct psychiatric disorder, with its own checklist of symptoms identifying mothers who suffer from it.
