Moles, Dysplastic Nevi, and Melanoma in Owings Mills
Why should you monitor your moles and skin for melanoma risk?
Almost everyone has moles—some are like beauty marks, while others may put you at significant risk for melanoma, a potentially fatal skin cancer. Moles change in size, shape, and color as you age, and any change could be a sign of skin cancer requiring immediate evaluation.
The alarming truth: In 1935, the lifetime risk of a Caucasian developing melanoma was one in 1,500 people. By 2013, that lifetime risk had skyrocketed to one in 52 people—a 29-fold increase in less than 80 years.
Early detection of melanoma is life-saving. When melanoma is caught early and completely removed before it spreads, the five-year survival rate exceeds 99%. Once melanoma spreads to other body areas, survival rates drop dramatically. This is why regular skin cancer screening and monitoring of changing moles is absolutely critical.
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:
- 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)
- Use a hand mirror to examine difficult-to-see areas
- Check all moles using the ABCDE rule
- Look for new moles that weren’t present before
- Note any changes—size, shape, color, or any bleeding/itching
- Take photos of moles you’re uncertain about so you can compare them over time and show them to Dr. Snyder
- 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.
Don’t ignore changing moles
Early detection of melanoma has a near-100% five-year survival rate. When melanoma spreads, survival rates drop dramatically. Regular skin exams and prompt evaluation of any concerning moles could save your life.
Frequently Asked Questions
Dysplastic nevi have the potential to develop into melanoma, which is why they’re considered pre-cancerous lesions. However, not every dysplastic nevus becomes melanoma. The presence of dysplastic nevi significantly increases your lifetime melanoma risk (approximately one in 10). This is why surveillance is critical—regular exams can detect transformation early before melanoma develops or spreads.
Having one melanoma increases your risk of developing additional melanomas, but it doesn’t guarantee recurrence. However, you should expect to need intensive surveillance with exams every 3-4 months initially, transitioning to every 6-12 months. Strict sun protection and regular self-exams are critical. Many melanoma survivors remain melanoma-free with appropriate monitoring and prevention.
Melanoma is staged based on thickness (measured in millimeters), presence of ulceration, and whether it has spread to lymph nodes or distant organs. Stage 0 (in situ) has near-100% five-year survival. Stage 1-2 (localized, thin to intermediate thickness) has excellent prognosis if completely removed. Stage 3 (lymph node involvement) has lower but still reasonable survival rates with appropriate treatment. Stage 4 (distant spread) has poor prognosis. This is why early detection—catching melanoma at thin, localized stages—is absolutely life-saving.
Dermoscopy is a specialized magnification technique using a hand-held instrument that reveals skin patterns invisible to the naked eye. Dr. Snyder uses dermoscopy to evaluate concerning moles and detect subtle changes during surveillance visits. This technology increases diagnostic accuracy and allows detection of early melanoma that would otherwise be missed on clinical examination alone.
Yes. While melanoma is more common on sun-exposed areas, it can develop anywhere on the body—including palms, soles, nails, eyes, and even internal organs. This is why full-body skin exams are important, and why you should check all areas of your skin monthly, including non-sun-exposed areas and between toes and fingers.
No. Not all changing moles develop into melanoma. However, any change in a mole’s appearance warrants evaluation. Changes could indicate dysplastic nevus, other benign changes, or melanoma. Only a dermatologist can determine which through clinical evaluation and, when appropriate, biopsy. Don’t assume a changing mole is benign—get it checked promptly.
Basal cell carcinoma (BCC) is the most common skin cancer but rarely spreads and is very survivable. Squamous cell carcinoma (SCC) is more aggressive than BCC but still less dangerous than melanoma. Melanoma, originating in melanocytes, spreads rapidly if not caught early. When caught early (thin, localized), melanoma is highly curable. When spread to lymph nodes or other organs, melanoma is much more difficult to treat and has poorer outcomes. This is why early detection of melanoma is absolutely critical.
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