Product Code Database
An omphalolith, also known as a umbolith, omphalith, navel stone, (2000). 9783642597152, Springer. ISBN 9783642597152 or umbilical concretion is a navel mass that may form due to the accumulation of sebum and keratin. The colour is black or brown, and may be related to the skin type of the patient. It may resemble a malignant melanoma. It may be caused by poor hygiene, and may form in retracted navels in obese people.
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