Tumour-to-tumour Metastasis: Cutaneous Melanoma Metastasizing to Leiomyoma Uteri

The incidence of melanoma is increasing worldwide. It is known that melanoma frequently progresses to metastatic disease. The aim of this report is to emphasise the metastatic potential of cutaneous melanoma to various body areas, as well as the ability to produce unexpected presentation of the disease. A 48-year female had a myomatous uterus and underwent hysterectomy. At the pathological examination, multiple leiomyomas were diagnosed and in one of them, the metastatic melanoma was found, the later confirmed with immunohistochemical analysis. The medical history revealed that the patient was previously operated two years back due to skin superficial spreading melanoma. The metastasis to uterine leiomyoma was the first site of distant spread. Melanoma is a type of tumour with aggressive and unpredictable behaviour, so metastases to unexpected localisations could occur. A careful examination of patient's body is mandatory, including the remote areas and even benign tumours.