1. Progressive Hyperpigmented Plaques: Answer
   Kristen M. Beck et al, 2019, The American Journal of Dermatopathology CrossRef
2. Treatment of cutaneous plasmacytosis with mask‐bath PUVA: A therapeutic option
   Zhun Rui Mok et al, 2017, Australasian Journal of Dermatology CrossRef
3. Primary cutaneous plasmacytosis successfully treated with topical corticosteroids and psoralen plus ultraviolet A: A case report
   Thanyathorn Nuchanatanon et al, 2024, Clinical Case Reports CrossRef
4. Cutaneous plasmacytosis: Report of a Moroccan case!!
   Naoufal Hjira et al, 2014, Journal of Dermatology & Dermatologic Surgery CrossRef