REFERENCES
1. Morrison KM, Miesegaes GR, Lumpkin EA, Maricich SM. Mammalian Merkel cells are descended from the epidermal lineage. Dev Biol 2009;336:76-83.
2. Albores-Saavedra J, Batich K, Chable-Montero F, Sagy N, Schwartz AM, Henson DE. Merkel cell carcinoma demographics, morphology, and survival based on 3870 cases: a population based study. J Cutan Pathol 2010;37:20-7.
3. Lemos BD, Storer BE, Iyer JG, Phillips JL, Bichakjan CK, Fang LC, Johnson TM, Liegeois-Kwon NJ, Otley CC, Paulson KG, Ross MI, Yu SS, Zeitouni NC, Bryd DR, Sondak VK, Gershenwald JE, Sober AJ, Nghiem P. Pathologic nodal evaluation improves prognostic accuracy in Merkel cell carcinoma: analysis of 5823 cases as the basis of the first consensus staging system. J AM Acad Dermatol 2010;67:751-61.
4. Becker JC, Houben R, Ugurel S, Trefzer U, Pfohler C, Schrama D. MC polyomavirus is frequently present in Merkel cell carcinoma of European patients. J Invest Dermatol 2009;129:248-50.
5. Heath M, Jaimes N, Lemos B, Mostaghimi A, Wang LC, Pe-as PF, Nghiem P. Clinical characteristics of Merkel cell carcinoma at diagnosis in 195 patients: the AEIOU features. J AM Acad Dermatol 2008;58:375-81.
7. Scott MP, Helm KF. Cytokeratin 20: a marker for diagnosing Merkel cell carcinoma. Am J Dermatopathol 1999;21:16-20.
8. Hanly AJ, Elgart GW, Jorda M, Smith J, Nadji M. Analysis of thyroid transcription factor-1 and cytokeratin 20 separates merkel cell carcinoma from small cell carcinoma of lung. J Cutan Pathol 2000;27:118-20.
9. Medina-Franco H, Urist MM, Fiveash J, Heslin MJ, Bland KI, Beenken SW. Multimodality treatment of Merkel cell carcinoma: case series and literature review of 1024 cases. Ann Surg Oncol 2001;8:204-8.
10. Lebbe C, Becker JC, Grob JJ, Malvehy J, Del Marmol V, Pehamberger H, Peris K, Saiag P, Middleton MR, Bastholt L, Testori A, Stratigos A, Garbe C; European Dermatology Forum (EDF), the European Association of Dermato-Oncology (EADO) and the European Organization for Research and Treatment of Cancer (EORTC). Diagnosis and treatment of Merkel cell carcinoma. European consensus-based interdisciplinary guideline. Eur J Cancer 2015;51:2396-403.
11. Schlaak M, Podewski T, Von Bartenwerffer W, Kreuzberg N, Bangard C, Mauch C, Kurschat P. Induction of durable responses by oral etoposide monochemotherapy in patients with metastatic Merkel cell carcinoma. Eur J Dermatol 2012;22:187-91.