The phrase "a extremely common" is not correct in written English.
It should be "an extremely common" because "extremely" begins with a vowel sound.
Example: "It is an extremely common misconception that all cats hate water."
Alternatives: "a very common" or "a highly common".
Patients, meanwhile, should know that mistaking a staph skin infection for an insect bite, particularly a spider bite, is an extremely common mistake, said Dr. Bancroft in Los Angeles, and may lead to delays in treatment.
Tendinopathy remains both an extremely common condition and a condition with few truly effective treatments.
"Don't judge a book by its cover" is an extremely common phrase, but to be honest, no one really follows that tip.
In fact, this is an extremely common occurrence across Wikipedia, affecting a great deal of the platform's connectivity between people, places, times and events.
Headache is an extremely common condition in childhood, with a prevalence of 40 50% by age 7 and 70 75% by age 15 [1].
Low back pain (LBP) is an extremely common musculoskeletal disorder that affects an estimated 80% of people at some time in their lives and represents the most common cause of disability [ 1].
"It's an extremely common occurence," said John McAfee, president of McAfee Associates, a Santa Clara, Calif., virus consulting firm.
Osteoarthritis (OA) is an extremely common type of degenerative joint disease and is a major cause of pain and chronic disability in aging individuals.
Pain is an extremely common symptom of aging and its management is a challenging task for any physician, secondary to unique individual physiological states, multiple barriers, and associated comorbidities.
Steatosis is an extremely common histological finding in patients with CHC, with a prevalence ranging from 40 to 80% [ 40], superior to the rate reported in chronic liver diseases of different etiology [ 41].
