Diagnosis: Large congenital melanocytic nevus
This case presents a large hyperpigmented hairy patch observed at birth in a 3-year-old girl. The lesion has remained stable in size and color, with no associated symptoms. Given its characteristics and the patient's age, a congenital melanocytic nevus is suspected, warranting further evaluation and management considerations.
The patient is a 3-year-old female who presents with a large hyperpigmented hairy patch located on the back, noted at birth. The lesion has not changed in size or color over the years and is asymptomatic. Examination reveals a well-defined, irregularly shaped, dark brown patch with coarse hair follicles.Size: Approximately 15 cm in diameter.Color: Dark brown with areas of lighter pigmentation.Surface: Hairy, with coarse terminal hair present.Border: Irregular and well-defined.Associated findings: No ulceration, bleeding, or signs of infection.
The lesion was first observed at the time of birth and has been stable since then. There are no known triggers or prior treatments for the nevus. The patient has a healthy past medical history with no significant family history of skin lesions or malignancies. Social history is unremarkable.Onset: Present at birth with no change in characteristics.Family history: No history of congenital nevi or skin cancer.Social history: No exposure to UV light or tanning beds.Prior treatments: None; lesion has been monitored.Associated symptoms: No itching, pain, or other symptoms reported.
Acute / First-Line ManagementObservation is the primary approach for stable congenital melanocytic nevi, especially those that are large and asymptomatic.Referral to a pediatric dermatologist is recommended for ongoing monitoring and evaluation for potential changes.Workup and Diagnostic ConfirmationDermatoscopic evaluation can help assess the lesion's characteristics.Consideration of imaging studies (e.g., ultrasound) for deeper assessment if any changes occur.Biopsy may be indicated if there are any concerning changes in the lesion's appearance.Long-Term ManagementRegular follow-up every 6-12 months with a dermatologist to monitor for changes in size, color, or symptoms.Education regarding the signs of malignant transformation, including changes in color, size, or the appearance of symptoms.Consider surgical excision if the lesion shows concerning features, particularly if there is a change in the clinical picture.
Melanocytic Nevus: Commonly presents as a pigmented lesion, typically smaller than a congenital nevus, with uniform color and regular borders.Giant Congenital Melanocytic Nevus: Larger than 20 cm, hairy, and associated with a higher risk of melanoma; requires careful monitoring.Neurocutaneous Melanosis: Associated with multiple CNS abnormalities; presents with multiple lesions and neurological symptoms.Dermal Melanocytosis: Blue-gray pigmentation usually located on the back or buttocks, typically fades with age and is benign.Acquired Melanocytic Nevus: Develops postnatally; usually smaller and more uniform than congenital types.Seborrheic Keratosis: Benign, often pigmented, with a “stuck-on” appearance, more common in adults.Melanoma: Malignant transformation of a nevus; may present with asymmetry, irregular borders, and color variegation.
High-Yield PearlsCongenital Nevi: These lesions are present at birth and can vary greatly in size and appearance, requiring careful monitoring.Risk Assessment: Larger congenital nevi (e.g., > 20 cm) have an increased risk of melanoma and should be evaluated regularly.Observation: Many congenital nevi are stable and do not require intervention unless there are changes in characteristics.Referral: Pediatric dermatology referral is essential for ongoing management of large congenital nevi.Education: Parents should be educated on signs of malignant transformation and the importance of regular follow-up.Congenital melanocytic nevi require lifelong monitoring due to their potential risk of malignancy.
Tags: pediatric, congenital nevus