Primary Vulvar Melanoma in a 27-Year-Old Pregnant Woman: A Case Report and Literature Review - Xian-Hong Yang; Yan Wang; Wei Zhang; Li-Ming Huang; Bao-Zhu Chang; Xue-Bao Shao; Fang Fang; Jian-Fang Sun; Yi-Qun Jiang (Wolters Kluwer Health, 2019)