sQUIZ your knowledge! A patch of blue-grey papules on the shoulder of an adolescent patient

Lisboa AP, Silvestre KJ, Pedreira RL, Alves NRM, Obadia DL, Azulay-Abulafia L. Agminated blue nevus — Case report. An Bras Dermatol 2016; 91(5): 658–60. Shenfield HT, Maize JC. Multiple and agminated blue nevi. J Dermatol Surg Oncol 1980; 6(9): 725–8. Pizzichetta MA, Soyer HP, Massone C, Cerroni L. Clinical and dermoscopic features of agminated blue nevus. Arch Dermatol 2007; 143(9): 1225–6. Simonetti V, Grenzi L, Piana S, Albertini G, Longo C. Agminated blue nevus combined with nevus spilus: an uncommon association. Int J Dermatol 2015; 54(2): 215–6. Lapresta A, Mollejo M, García-Almagro D. Pl Pápulas azuladas en la frente [Bluish papules on the forehead]. Actas Dermosifiliogr 2011; 102(3): 219–20. Eichenfield DZ, Cotter D, Thorson J, Hinds B, Sun BK. Agminated blue nevus with a GNAQ mutation: A case report and review of the literature. J Cutan Pathol 2019; 46(2): 130–3.