Moles, Dysplastic Nevi, and Melanoma in Owings Mills

What are moles and why do they develop?

Moles are collections of pigment-producing cells (melanocytes) that cluster together, creating dark spots on the skin. Most moles are benign (non-cancerous) and pose no health risk. However, all moles have some potential to develop into melanoma, which is why monitoring is important.

Normal moles typically have these characteristics:

• Symmetric (one half matches the other)
• Smooth, even borders
• Uniform color (usually brown, black, or tan)
• Less than 6 millimeters in diameter (pencil eraser size)
• Flat or slightly raised
• Stable in appearance (not changing)

Most people develop their moles in childhood and young adulthood. The number of moles tends to increase with sun exposure and typically peaks around age 40-50. New moles in older adults or changing moles at any age warrant evaluation by a dermatologist.

What are dysplastic nevi and how do they differ from normal moles?

Dysplastic nevi, also called atypical moles, are abnormal-looking moles with concerning features that increase melanoma risk. Unlike normal moles, dysplastic nevi have:

• Irregular, jagged, or notched borders that blend into surrounding skin
• Multiple colors (brown, black, tan, red, or even skin-colored) within a single lesion
• Larger size—often 8-12 millimeters or larger
• Asymmetry—one half doesn’t match the other
• Slight elevation or texture change compared to surrounding skin
• Tendency to change—size, color, or shape may evolve over time

Critical risk information: People with dysplastic nevi have a lifetime melanoma risk of approximately one in 10. If you have dysplastic nevi AND a family history of melanoma, your lifetime risk jumps to one in one—meaning you have near-100% lifetime risk of developing melanoma.

This is why dermatologic surveillance is absolutely essential for anyone with dysplastic nevi.

The ABCDE rule: how to recognize suspicious moles and early melanoma

The ABCDE rule is the gold standard for evaluating whether a mole or skin lesion is concerning and should be evaluated by a dermatologist:

• A = Asymmetry—One half of the lesion doesn’t match the other half. Draw an imaginary line through the center; if the two halves are different, the lesion is concerning.
• B = Border irregularity—The borders are jagged, notched, scalloped, or irregular instead of smooth and well-defined. The lesion appears to fade into surrounding skin rather than having a clear boundary.
• C = Color variation—The lesion contains multiple colors or shades. While normal moles are typically one uniform brown or black color, concerning lesions may contain brown, black, red, pink, white, or even blue hues within the same lesion.
• D = Diameter—The lesion is larger than 6 millimeters (about the size of a pencil eraser). While not all melanomas are large and not all large lesions are melanoma, size greater than 6mm warrants evaluation.
• E = Evolving—The lesion is changing in appearance. Changes in size, shape, color, or elevation—especially rapid changes—are warning signs. Any mole that’s been stable for years and then suddenly starts changing needs evaluation.

If your mole meets ANY of these criteria, schedule a dermatology evaluation immediately. Early detection saves lives.

Risk factors for melanoma and dysplastic nevi

Several factors increase your melanoma risk:

• Fair skin, light hair, blue eyes—lighter skin has less protective melanin
• History of severe sunburns—especially in childhood or adolescence
• Excessive UV exposure—from sun exposure, tanning beds, or other sources
• Multiple moles (30+)—more moles = more opportunity for transformation
• Dysplastic nevi—dramatically increases risk
• Family history of melanoma—genetics play a significant role
• Personal history of melanoma or other skin cancer—significantly increases recurrence risk
• Immunosuppression—organ transplant recipients and immunocompromised patients have higher risk
• Older age—melanoma can develop at any age but risk increases with age
• Male gender—men have higher melanoma mortality rates

If you have multiple risk factors, regular dermatologic screening is essential.

How often should you have skin cancer screening and mole evaluation?

If you have no personal history of melanoma or dysplastic nevi: Annual full-body skin exams are recommended, particularly if you have fair skin or significant sun exposure history.

If you have dysplastic nevi: Skin exams every 3-6 months are appropriate. Dr. Snyder will establish the ideal surveillance schedule based on your specific risk factors and number of concerning lesions.

If you have a personal history of melanoma: More frequent exams (every 3-4 months) are typically recommended for the first few years, then transitioned to every 6-12 months based on your specific case.

If you have dysplastic nevi AND family history of melanoma: Intensive surveillance with exams every 3-4 months is critical given your near-100% lifetime melanoma risk.

During surveillance visits, Dr. Snyder documents moles photographically and uses dermoscopy (specialized magnification) to detect subtle changes invisible to the naked eye.

Mole removal and evaluation: when and how

Reasons to remove or biopsy a mole include:

• Suspicious appearance (meeting ABCDE criteria)
• Recent change in appearance
• Cosmetic concerns—moles you find unattractive
• Location in areas prone to irritation (friction from clothing, shaving)
• Biopsy-proven dysplastic nevus or other concerning findings

Dr. Snyder’s mole removal and evaluation options include:

• Dermoscopy—specialized magnified examination to evaluate mole characteristics and detect subtle changes
• Skin biopsy—removal of suspicious lesions for microscopic analysis to determine if melanoma, dysplastic nevus, or benign mole
• Surgical excision—complete removal of suspicious moles with appropriate margins for safety and pathologic examination
• Laser removal—for benign moles removed for cosmetic reasons; leaves minimal scarring
• Shave excision—for raised benign moles; quick, minimal downtime procedure

All removed moles are sent for pathologic examination to confirm they’re benign or to identify any concerning findings requiring additional monitoring.

What is melanoma and what are early warning signs?

Melanoma is a serious cancer that originates in melanocytes (pigment-producing cells). Unlike basal cell carcinoma and squamous cell carcinoma, which rarely spread, melanoma spreads rapidly to lymph nodes and other organs if not caught and treated early.

Early melanoma may present as:

• A new mole that appears suddenly or grows quickly
• An existing mole that changes in size, shape, or color
• Asymmetric lesion with irregular borders
• Lesion with multiple colors
• Lesion larger than 6mm
• Lesion with bleeding, oozing, or itching
• Dark streak under fingernail or toenail (acral lentiginous melanoma)

The critical difference: Most physicians recognize melanoma when it’s already advanced and may have spread. Dermatologists like Dr. Snyder are uniquely trained to recognize subtle changes in moles in their earliest, most curable stages—before they become clinically obvious melanoma.

Prevention of moles and melanoma: sun protection strategies

While you cannot prevent all moles from developing, you can significantly reduce melanoma risk through sun protection:

• Daily sunscreen—use SPF 30+ broad-spectrum sunscreen year-round, even on cloudy days; reapply every 2 hours if outdoors
• Avoid peak sun hours—limit outdoor time between 10 AM and 4 PM when UV rays are strongest
• Protective clothing—wear long sleeves, pants, and wide-brimmed hats when possible
• Avoid tanning beds—UV exposure from tanning beds significantly increases melanoma risk; there is no safe tanning bed
• Seek shade—use umbrellas or find shaded areas when outdoors
• UV-blocking sunglasses—protect eyes and delicate eyelid skin
• Avoid sunburns at all costs—even one severe sunburn, especially in childhood, significantly increases lifetime melanoma risk
• Regular self-exams—monthly full-body skin checks using the ABCDE rule
• Regular professional exams—annual or more frequent dermatology screening

Sun protection should begin in infancy and continue throughout life. Lifetime UV exposure is cumulative, so protection matters at every age.

Self-examination: how to check your own skin for concerning moles

Monthly self-exams are an important part of early melanoma detection. Here’s how to examine your skin:

1. Undress completely and examine your entire body in a mirror, including areas you don’t usually see (scalp, back, buttocks, soles of feet, palms, between toes)
2. Use a hand mirror to examine difficult-to-see areas
3. Check all moles using the ABCDE rule
4. Look for new moles that weren’t present before
5. Note any changes—size, shape, color, or any bleeding/itching
6. Take photos of moles you’re uncertain about so you can compare them over time and show them to Dr. Snyder
7. Don’t panic if you find a concerning mole, but do schedule a dermatology evaluation promptly

Self-exams are most effective when done monthly. Mark your calendar as a reminder.

Schedule your comprehensive mole and melanoma screening

If you have moles that concern you, dysplastic nevi, family history of melanoma, or simply want a thorough skin cancer screening, Dr. Steven Barry Snyder is a board-certified dermatologist uniquely qualified to evaluate and manage your skin cancer risk. Early detection of melanoma saves lives.

Call (410) 356-0000 to schedule your mole evaluation and skin cancer screening. Dr. Snyder will perform a thorough examination, answer all your questions about your melanoma risk, and create an appropriate surveillance plan for your individual risk level.