Dermoscopic Monitoring

Dermoscopic monitoring is a structured surveillance technique used to track pigmented lesions over time, enabling the detection of subtle changes that may indicate melanoma development. Through sequential digital dermoscopy (SDD), baseline images of individual lesions are captured and compared with follow-up images at defined intervals, providing a reliable method for identifying early transformation in moles and other pigmented skin lesions.

What Is Dermoscopic Monitoring

Dermoscopy is a non-invasive imaging technique that uses magnification and polarized light to visualize structures within the skin that are not visible to the naked eye. When applied in a monitoring context, dermoscopic images of individual lesions are captured at an initial visit to establish a baseline. At subsequent follow-up visits, new images are taken and compared side-by-side with the baseline to identify any morphological changes.

Sequential digital dermoscopy is particularly valuable because it can detect changes that are too subtle to be appreciated during a single clinical examination. By documenting the dermoscopic appearance of a lesion at multiple time points, even minor structural or colour alterations become evident, allowing for earlier intervention when necessary.

Who Benefits from Monitoring

Dermoscopic monitoring is most beneficial for patients whose clinical profile places them at elevated risk for melanoma development. The following groups are particularly well suited for structured surveillance:

• Patients with multiple clinically atypical (dysplastic) nevi
• Individuals with a personal history of melanoma
• Patients with a first-degree family history of melanoma
• Those diagnosed with dysplastic naevus syndrome (atypical mole syndrome)
• Patients with a very high total body naevus count

For these patients, dermoscopic monitoring reduces the number of unnecessary biopsies by allowing clinicians to observe lesions over time rather than excising every atypical-appearing mole at the initial visit.

The Monitoring Process

At the initial monitoring visit, a comprehensive skin examination is performed and selected lesions of interest are photographed using a digital dermoscope. These images are stored in the patient record and serve as the reference baseline. Clinical photographs of the total body skin surface may also be captured to aid in the detection of new lesions at follow-up.

At each subsequent visit, the same lesions are re-imaged under identical conditions. The follow-up images are then compared directly with the baseline images. This side-by-side comparison allows for the identification of any changes in symmetry, colour distribution, structural pattern, or border configuration.

Interpreting Changes

Not all changes observed during dermoscopic monitoring are indicative of malignancy. Benign moles may undergo slow, symmetrical growth or minor colour shifts, particularly in younger patients. However, certain types of change are considered significant and typically warrant biopsy for histopathological evaluation:

• Asymmetric enlargement or change in shape
• Development of new colours, particularly dark brown, black, blue-grey, or white regression structures
• Appearance of new dermoscopic structures such as irregular dots, globules, or atypical vascular patterns
• Loss of previously present symmetrical structures

The decision to biopsy is based on the overall clinical context, including the nature and degree of change, the patient's risk profile, and the dermoscopic pattern of the lesion.

Monitoring Intervals

The frequency of dermoscopic monitoring is tailored to each patient's individual risk level. For patients at the highest risk, such as those with a personal history of melanoma or dysplastic naevus syndrome, monitoring at 3-month intervals may be appropriate initially. Moderate-risk patients are typically monitored every 6 months. For lower-risk individuals with a small number of atypical lesions, annual monitoring may be sufficient.

Monitoring intervals may be adjusted over time based on the stability of the lesions being tracked and any changes in the patient's overall risk profile.

At the Centre for Medical and Surgical Dermatology, Dr. Maksym Breslavets offers structured dermoscopic monitoring programmes for patients with atypical moles and elevated melanoma risk. Sequential digital imaging is used to track lesions over time, ensuring that any significant changes are detected promptly and managed appropriately.