Back to Top Exams and Tests. Your health care provider can usually diagnose acanthosis nigricans by looking at your skin. A skin biopsy may be needed in unusual cases. If there is no clear cause of acanthosis nigricans, your doctor may order tests. This may include: 1  Blood tests to check blood sugar level.
The definition of unlike is a person or thing that is different from another. An example of unlike is a woman with short hair in a group of women with long hair. The definition of unlike is to withdraw your previously-posted expression of liking someone or something on a social media website. An example of unlike is to remove the like which you previously selected under a post from one of your friends on FaceBook. An example of unlike is to remove a television show which you previously had noted as one of your likes on FaceBook.
The definition of extreme is most remote or far from what is necessary or usual. An example of extreme is a fever of 104. An extreme is defined as something which is the farthest or highest, or things that are very different or far apart from one another. An example of extreme is the top of Mount Everest. An example of extreme is the range of feelings from depressed to very joyful.