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Spitz melanocytoma — Clinical Guidelines

Overview

Spitz nevi are benign melanocytic neoplasms typically found in children and adolescents, often mimicking melanoma clinically and dermoscopically. They are characterized by their rapid growth and distinctive histological features, distinguishing them from conventional melanomas 1 2 5.

Diagnosis

Clinical Presentation: Usually presents as a rapidly growing, dome-shaped, brown to black papule 1 2 5.

Dermoscopy: Characteristic patterns include globular and starburst configurations, reflecting potential evolutionary phases 2.

Histopathology: Features include a plexiform and nested architecture, minimal cytologic atypia, and a grenz zone 1 2 5.

Differentiation from Melanoma: Essential to rule out malignant potential through histopathological examination 1 2.

Management

Biopsy Recommendation: Majority of dermatologists recommend biopsy for suspected Spitz nevi, with partial (55%) or total (43%) excision 3.

Excision Margins: General dermatologists often recommend 1-2 mm margins (70%), while pediatric dermatologists prefer margins less than 4 mm (80%) 3.

Follow-Up: Monitoring is less favored, particularly in pediatric populations 3.

Re-excision: For incompletely removed lesions, complete excision is advised by 69% of physicians 3.

Special Populations

Pediatrics: Management often involves smaller excision margins (<4 mm) preferred by pediatric dermatologists 3.

Racial Considerations: Spitz nevi can occur in individuals of mixed ancestry, including those with darker skin tones, though this is noted as rare 6.

Key Recommendations

Biopsy Suspected Spitz Nevi: Recommend biopsy for suspected Spitz nevi due to clinical mimicry of melanoma (Evidence: Moderate 3).

Consider Smaller Margins in Pediatric Patients: Excision with 1-2 mm margins is appropriate for pediatric cases (Evidence: Moderate 3).

Re-excise Incompletely Removed Lesions: Complete excision should be considered for incompletely removed Spitz nevi to ensure clear margins (Evidence: Moderate 3).

References

1 Benton S, Roth A, Khan AU, Zhao J, Kim D, Compres EV et al.. Risk factors for the development of Spitz neoplasms. Pediatric dermatology 2022. link 2 Pizzichetta MA, Argenziano G, Grandi G, de Giacomi C, Trevisan G, Soyer HP. Morphologic changes of a pigmented Spitz nevus assessed by dermoscopy. Journal of the American Academy of Dermatology 2002. link 3 Gelbard SN, Tripp JM, Marghoob AA, Kopf AW, Koenig KL, Kim JY et al.. Management of Spitz nevi: a survey of dermatologists in the United States. Journal of the American Academy of Dermatology 2002. link 4 Hauptman G, Kopf A, Rabinovitz H, Oliviero M, Rao B. Spitz nevus: a case report. Cutis 1999. link 5 Dellon AL, Farmer ER. Pigmented Spitz nevus in an adult. Annals of plastic surgery 1988. link 6 Wells LD, Bertelsen CA, Clairborne EA, Cochran AJ. Spitz's nevus in a "black" child of mixed ancestry. The American Journal of dermatopathology 1984. link 7 Ferracini R, Gardini G, Brisigotti M, Lanzanova G, Manetto V, Lorenzini P. Metastasizing meningeal melanocytoma. Tumori 1980. link

Spitz melanocytoma