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Dermatological knowledge

Risk of skin cancer from moles

Dr. Anh Thu, MD — Specialist Level II DermatologistJun 10, 20232 min read
Risk of skin cancer from moles

General Information

Moles are commonly used to describe black or brown spots on the skin. Many conditions can cause these spots, but moles are most commonly understood as pigmented birthmarks. There are two types of moles (pigmented birthmarks): congenital and acquired.

Congenital moles appear from birth or before the age of two. Acquired moles appear after the first two years but originate from embryonic development. Most moles emerge after the age of two.

The different colors of moles, such as black, brown, or blue, are due to pigment cells containing different colored substances. Depending on the location, density of pigment, and depth of the mole, their color manifests differently. Most moles are black, while some are brown. Essentially, moles are similar in nature.

MOLE LOCATIONS THAT MAY INDICATE CANCER
The essence of moles is the damage to pigment cells in the skin, which carries a certain risk of becoming cancerous. Among these, large congenital moles have the highest risk, with a 13% chance of developing into cancer. Additionally, moles located on the palms, soles, semi-mucous areas, or scalp are considered dangerous due to their potential to become cancerous. Changes in moles in other locations can also signal cancer.

  • Changes in size: Congenital moles that grow faster than the body’s development.
  • Changes in color: Transitioning from dark to light, light to dark, or becoming blotchy, with additional colors appearing.
  • Changes in surface: The mole becomes raised and uneven.
  • Changes in borders: If the edges of a mole become blurred and unclear, differing from other moles, this could also indicate cancer.

The lesions from malignant tumors often cause the blurring of mole boundaries. Additionally, other symptoms like inflammation, bleeding, ulceration, or itching from moles should also raise concern about cancer.

To treat mole-related cancer, the affected moles are surgically removed. Furthermore, moles located in high-risk areas like the palms, soles, semi-mucous areas, or scalp are advised to be removed as early as possible. You should visit a dermatology hospital or a reputable clinic if you notice any unusual changes in your moles.

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Dr. Anh Thu, MD — Specialist Level II Dermatologist
Medically reviewed by

Dr. Anh Thu, MD — Specialist Level II Dermatologist

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Education & Professional Credentials

Dr. Anh Thu completed her entire formal and advanced clinical training at the University of Medicine and Pharmacy at Ho Chi Minh City (UMP HCMC), the top-tier medical institution in Southern Vietnam:

  • Doctor of Medicine (MD) – University of Medicine and Pharmacy at Ho Chi Minh City.

  • Specialist Level I in Dermatology – University of Medicine and Pharmacy at Ho Chi Minh City.

  • Specialist Level II in Dermatology (Senior Consultant Level) – University of Medicine and Pharmacy at Ho Chi Minh City.

Continuous Medical Education (CME) & Certifications:
  • Certification: Laser, Radiofrequency (RF), and High-Intensity Focused Ultrasound (HIFU) in Aesthetic Dermatology (UMP HCMC).

  • Certification: Specialized Dermal Filler Injections in Aesthetic Medicine (UMP HCMC).

  • Certification: Advanced Clinical Practice of Botulinum Toxin Injections (UMP HCMC).

  • Certification: Medical Thread Lifting Techniques (UMP HCMC).

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