Reflectance Confocal Microscopy Findings in a Small-Diameter Invasive Melanoma

Area of Science:

• Dermatology
• Oncology
• Medical Imaging

Background:

• Small-diameter pigmented lesions pose diagnostic challenges in clinical practice.
• Dermoscopy can suggest melanoma but may require further investigation for definitive diagnosis.
• Accurate differentiation between atypical nevi and melanoma is crucial for appropriate patient management.

Observation:

• A 57-year-old male presented with a 2.5-mm pigmented papular lesion suspicious for melanoma on dermoscopy.
• Differential diagnosis between an atypical nevus and melanoma was uncertain.
• Reflectance confocal microscopy (RCM) was utilized for in-vivo, high-resolution imaging of the lesion.

Findings:

• Reflectance confocal microscopy (RCM) provided a confident diagnosis of invasive melanoma.
• The confirmed melanoma had a Breslow thickness of 0.3 mm.
• RCM enabled precise characterization of cellular and architectural features indicative of malignancy.

Implications:

• Reflectance confocal microscopy (RCM) is a valuable tool for diagnosing small-diameter invasive melanomas.
• Early and accurate diagnosis facilitated by RCM leads to timely and appropriate patient management.
• This case underscores the utility of RCM in challenging dermatological diagnoses, potentially improving patient outcomes.