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Wide excision with margin control or Mohs' surgery must be undertaken if the lesion recurs. For lesions larger than 2.5 cm, Mohs' surgery or wide excision is recommended as first option. 6 In conclusion, the clinical and histopathological recognition of PAK is important in order to apply a more aggressive therapy than the conventional therapy used for the rest of KA subtypes. References1 Salache SJ. Epidemiology of actinic keratosis and squamous cell carcinoma. J Am Acad Dermatol 2000; 42: S4-S7. 2 Naldi L, Chatenoud L, Piccitto R et al. Prevalence of actinic keratosis and associated factors in a representative sample of the Italian adult population: results from the prevalence of actinic keratosis Italian study, 2003 -04. Arch Dermatol 2006; 142: 722-726. 3 Quaedvlieg PJ, Tirsi E, Thissen MR, Krekels Ga. Actinic keratosis: how to differentiate the good from the bad ones? Eur J Dermatol 2006; 16: 335-339. 4 McKee PH, Calonje E, Granter SR. Actinic keratosis. In: Houston M, ed. Pathology of the Skin: With Clinical Correlations, 3rd edn. Elsevier Mosby, Philadelphia, PA, 2005: 1185-1191. 5 Goldberg LH, Joseph AK, Tschen JA. Proliferative actinic keratosis. Int J Dermatol 1994; 33: 341-345. 6 Goldberg LH, Chang LR, Baer SC, Schmidt JD. Proliferative actinic keratosis: three representative cases. Dermatol Surg 2000; 26: 65-69. 7 Suchniak JM, Baer D, Goldberg LH. The hypertrophic actinic keratosis. J Am Acad Dermatol 1997; 37: 392-394.

Abstract:Meyerson nevi occur whenever a rare focal and transitory eczematous eruption arises around melanocytic lesions. The same phenomenon has also been observed in non-melanocytic lesions as well. Herein we report the case of a 25 year old, male patient, who had noticed, two months before, the arising of a pruriginous and erithematous halo around two nevi localized on his abdomen. The lesions were found to be atypical on dermoscopic examination and he was submitted to surgical excision of both nevi. Histopathological examination revealed displastic compound melanocytic nevi, surrounded by intraepidermical vesicles and spongiosis. Present report suggests that Meyerson phenomenon does not seem to alter dermoscopic features of nevi. Keywords: Dermoscopy; Nevus; Nevus, pigmented Resumo: O nevo de Meyerson ocorre quando uma rara erupção eczematosa focal e transitória surge ao redor de lesões melanocíticas. O mesmo fenômeno também foi observado em lesões não melanocíticas. O caso relatado é o de um doente masculino, 25 anos, que há dois meses notara surgimento de eritema e prurido, circundando dois nevos, localizados no abdome. As lesões eram atípicas à dermatoscopia e procedeu-se à excisão cirúrgi-ca dos dois nevos. O exame histopatológico revelou nevos melanocíticos compostos displásicos, envolvidos por espongiose e vesículas intraepidérmicas. O presente relato sugere que o fenômeno de Meyerson não modifica as características dermatoscópicas dos nevos.

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