A mold (or mould) Fusarium solani (Review).
Found in decaying soils.
Local and, more commonly, disseminated disease in neutropenic patients. Worry it is the cause of any red/necrotic bump (it gets there hematogenously) in prolonged neutropenic fever with myalgias. Occasionally will involve severe burns.
In Brazil it is a cutaneous disease (PubMed). Someone want to send me during Carnival to check it out?
And if you can remove any of the infection surgically, do it. Debridement always the best therapy.