Locations
Colon
Adenomas of the colon, also called adenomatous polyps, are quite prevalent. They are found commonly at colonoscopy. They are removed because of their tendency to become malignant and to lead to colon cancer. Ashkenazi Jews have a 6% higher risk rate of getting adenomas, and then colon cancer, than do the general population, so it is important that they have regular actual colonoscopies, and specifically none of the less invasive diagnostic methods. Renal
This is a tumor that is most often small and asymptomatic, and is derived from renal tubules. It may be a precursor lesion to renal carcinoma. Adrenal
Adrenal adenomas are common, and are often found on the abdomen, usually not as the focus of investigation; they are usually incidental findings. About one in 10,000 is malignant. Thus, a biopsy is rarely called for, especially if the lesion is homogeneous and smaller than 3 centimeters. Follow-up images in three to six months can confirm the stability of the growth. While some adrenal adenomas do not secrete hormones at all, often some secrete cortisol, causing Cushings syndrome, aldosterone causing Conns syndrome, or androgens causing hyperandrogenism. Thyroid
About one in 10 people is found to have solitary thyroid nodules. Investigation is required because a small percentage of these is malignant. Biopsy usually confirms the growth to be an adenoma, but, sometimes, excision at surgery is required, especially when the cells found at biopsy are of the follicular type. Pituitary
Pituitary adenomas are seen in 10% of neurological patients. A lot of them remain undiagnosed.
Erythema multiforme  is usually a reaction of the skin and mucous membranes that occurs suddenly. It appears as a symmetrical rash and may include the mucous membrane lesions. This means that the body is sensitive to something that causes the skin and mucous membranes to react. The more common mild form is refer to as EM minor. It consists of a skin rash that involve no more than one mucosal surface. The sudden onset will progress rapidly as symmetrical lesions with circular color changes in some or all of the lesions. Rash will spread towards center or trunk of the body. Evenly distributed bumps on the skin become classic iris or target lesions. They have bright red borders and small white bumps in the center. The cause of EM appears to be a highly sensitive reaction that can be triggered by a variety of causes. The causes can include bacterial, viral or chemical products, such as antibiotics – specifically penicillins or cephalosporins. This reaction is an allergic reaction and is in no way contagious. : 140 Erythema multiforme minor is sometimes divided into papular and vesiculobullous forms. See also
Erythema
Diascopy
Erythema multiforme
List of cutaneous conditions

References


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