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15 Cards in this Set
- Front
- Back
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What is a Foreign Body Tattoo?
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The intentional or iatrogenic introduction of inert pigment within CT, eg Amalgam, graphite, carbon
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What is an alternative diagnosis for a Foreign Body Tattoo that may need to be ruled out?
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Melanocytic lesion
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What is the scientific name for a common mole?
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Acquired Melanocytic Naevus
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What are the 3 histological types of Acquired Melanocytic Naevus, and what are they based on?
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AMN are grouped depending on where the collection of nevus cells is located microscopically. Ie:
Junctional - first stage. Appear flat and usually dark and uniform in colour Compound - may evolve from a juctional neavus. Proliferation of naevus cells occurs, with some of the cells "dropping of" into the superficial CT. May begin to show elevation clinically. Hairs often seen Intradermal/Intramucosal - with time the naevus cells may be completely contained within the dermal CT. Elevated with variable degree of pigmentation. Many are normal skin colour, especially in older adults |
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Axuired Melanocytic Naevus infrequently develops in the oral cavity. When it does, where is it most likely?
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Hard palate, attached gingiva, but can be anywhere
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What is the risk of malignant transformation to melanoma for an individual nevus?
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1 in a million
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What is the treatment for an Aquired Melanocytic Naevus and when should you biopsy?
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No treatment necessary.
Excisional biopsy only needed when there are changes to the naevus or chronic irritation. |
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When a melanocytic naevus is present at birth, what is it called. How often does this occur?
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Congenital Melanocytic Naevus - 1% of newborns
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What is classified as a large Congenital Melanocytic Naevus as opposed to a small one? What are some other names for large CMN?
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Small <15cm
Large also know as: - "garment" nervus - "bathing trunk" nervus |
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What is the risk of a malignant transformation in a Congential Melanocytic Naevus?
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1% for small, possibly excise
10-15% for large, thus staged excision |
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What is the histology of a blue Naevus?
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Collection of dendritic melanocytes within the CT
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Describe a Blue Naevus...
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A bluish or blue-gray neavus that is less than 1cm, usually appears in the fourth decade of life. May effect any cutaneous or mucosal site.
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What is the treatment and prognosis for a Blue Naevus?
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Simple excision, prognosis is excellent, recurrence is rare.
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What is the histology of a Melanotic Macule?
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Shows NO naevus cells or clustering of melanocytes.
Often note increased amount of melanin pigment in the basal layer, or melanophages in the superficial CT or both |
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Tx of a Melanotic Macule?
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If on vermilion zone they are often excised for cosmetic purposes.
Tissue should be biopsied to make sure its not an early melanoma. |
