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When an atypical mole has been identified, a skin biopsy takes place in order to best diagnose it. Local anesthetic is used to numb the area, then the mole is biopsied. The biopsy material is then sent to a laboratory to be evaluated by a pathologist. A skin biopsy can be a punch, shave, or complete excision.
Moles tend to go deeper into the skin than non-invasive lasers can penetrate. After a laser treatment, a scab is formed, which falls off about 7 days later, in contrast to surgery, where the wound has to be sutured. A second concern about the laser treatment is that if the lesion is a melanoma, and was misdiagnosed as a benign mole, the ...
There are four main types of skin biopsies: shave biopsy, punch biopsy, excisional biopsy, and incisional biopsy. The choice of the different skin biopsies is dependent on the suspected diagnosis of the skin lesion. Like most biopsies, patient consent and anesthesia (usually lidocaine injected into the skin) are prerequisites. [citation needed]
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Shave biopsy is a biopsy procedure in which a skin abnormality and a thin layer of surrounding skin are removed with a small blade for examination under a microscope. Shave biopsies are not effective in treating melanomas, but can provide a reasonably safe and accurate initial diagnosis. [1] Surgical sutures are not needed with this procedure. [2]
Others may warrant more thorough examination and biopsy for histopathological examination (looking at a sample of skin under a microscope to detect unique cellular features). For example, a clinician may want to determine whether a pigmented nevus is a type of melanocytic nevus, dysplastic nevus, or melanoma as some of these skin lesions pose a ...
Since many autoimmune skin diseases have similar symptoms and usually affect the oral cavity, a biopsy must often be performed in order to correctly diagnose the disease. [18] Due to the wide scale of clinical symptoms that can be present, along with the diverse variations of skin autoimmune dermatoses, a single symptom will more than likely ...
The performance of a shave biopsy (see skin biopsy) might not acquire enough information for a diagnosis. An inadequate biopsy might be read as actinic keratosis with follicular involvement. A deeper biopsy down to the dermis or subcutaneous tissue might reveal the true cancer. An excision biopsy is ideal, but not practical in most cases.