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Cutaneous malignant melanoma is the third most common type of skin cancer, and its incidence has been rising. Its mortality rate is considerable, due to an aggressive phenotype and great ability of dissemination, mainly in the first years of follow- -up. Late recurrences, those presenting more than 10 years after diagnosis, are rare. The main prognostic factor of cutaneous malignant melanoma is tumor thickness, which also guides management. Thin tumors often have a good prognosis. We report a case of a 66-year-old woman with a history of excision of a thin primary cutaneous malignant melanoma of the dorsum, presenting 16 years later with an unexpected, rapidly progressing and lethal recurrence. [ABSTRACT FROM AUTHOR]

Contact allergy to ultrasound gel is rare, and most of the cases were associated with propylene glycol, parabens, isothiazolinones, and methyldibromo glutaronitrile in Euxyl K 400.[[3]] Patch tests with sensitized patients' triethanolamine-containing preparations are frequently negative. Therefore, it is advisable to test the components of the ultrasound gel, including emulsifiers, to the extent possible, in patients with suspected ultrasound gel-related contact dermatitis. [Extracted from the article]