Hindawi Publishing Corporation Case Reports in Oncological Medicine Volume 2015, Article ID 298273, 3 pages http://dx.doi.org/10.1155/2015/298273 Case Report Nonpigmented Metastatic Melanoma in a Two-Year-Old Girl: A Serious Diagnostic Dilemma Gulden Diniz,1 Hulya Tosun Yildirim,2 Selcen Yamaci,2 and Nur Olgun3 1 Izmir Tepecik Education and Research Hospital, Pathology Laboratory, Turkey 2Izmir Dr. Behcet Uz Children’s Hospital, Pathology Laboratory and Dermatology Clinics, Turkey 3Pediatric Oncology Clinics, Izmir Dokuz Eylul University, Turkey Correspondence should be addressed to Gulden Diniz;
[email protected] Received 23 July 2014; Revised 20 January 2015; Accepted 21 January 2015 Academic Editor: Francesca Micci Copyright © 2015 Gulden Diniz et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Although rare, malignant melanoma may occur in children. Childhood melanomas account for only 0.3–3% of all melanomas. In particular the presence of congenital melanocytic nevi is associated with an increased risk of development of melanoma. We herein report a case of malignant melanoma that developed on a giant congenital melanocytic nevus and made a metastasis to the subcutaneous tissue of neck in a two-year-old girl. The patient was hospitalized for differential diagnosis and treatment of cervical mass with a suspicion of hematological malignancy, because the malignant transformation of congenital nevus was not noticed before. In this case, we found out a nonpigmented malignant tumor of pleomorphic cells after the microscopic examination of subcutaneous lesion.