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Oral melanoacanthoma - Oral Mucosal Lesion
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Oral melanoacanthoma - Oral Mucosal Lesion

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Contributors: Carl Allen DDS, MSD, Sook-Bin Woo MS, DMD, MMSc
Other Resources UpToDate PubMed

Synopsis

Oral melanoacanthoma is a benign acquired pigmentation of the oral mucosa characterized by dendritic melanocytes dispersed throughout the thickness of the epithelium. Oral melanoacanthoma is seen almost exclusively in blacks with a female predilection and is most common in the third and fourth decades of life. The buccal mucosa is the most common site of involvement with lesions presenting as a well demarcated, smooth macule or slightly elevated plaque with a relatively uniform dark-brown to black color. The size of melanoacanthoma ranges from 0.5 to 3 cm. in diameter usually. Patients who have been aware of the development of their lesion often describe a relatively rapid increase in size over a period of a few weeks. Occasionally patients may develop a synchronous melanoacanthoma on the contralateral buccal mucosa.

Codes

ICD10CM:
D10.30 – Benign neoplasm of unspecified part of mouth

SNOMEDCT:
394727000 – Melanoacanthoma

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

  • Melanoma –This rare intraoral melanocytic malignancy usually develops on the hard palate or maxillary gingiva, and typically does enlarge as rapidly as the melanoacanthoma. Color variegation, ulceration, nodularity, irregular borders are indicative of a melanoma.
  • Melanocytic nevus – These slow growing lesions are more commonly seen on the hard palate and gingiva.
  • Amalgam tattoo – These are common lesions associated with embedded silver amalgam dental filling material within the soft tissue of the oral cavity. They are often found adjacent to restored teeth or in areas where teeth have been restored.

Best Tests

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Therapy

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References

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Last Updated: 01/20/2015
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Oral melanoacanthoma - Oral Mucosal Lesion
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Oral melanoacanthoma : Oral black macule, Oral brown macule
Clinical image of Oral melanoacanthoma
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