Myxofibrosarcoma, is the most common soft tissue sarcoma in the extremities of the elderly patients ( between sixty and eighty years of age).
Histopathologically, the tumour is characterized by spindle cellular proliferation with moderate cellular density in fibromyxoid stroma.
Source: De Castro BAC, Piancastelli ACC, Meyer RLB, Piancastelli PM, Ribeiro CA, Miranda RMC. Myxofibrosarcoma – Case report. Anais Brasileiros de Dermatologia. 2016;91(1):97-99. doi:10.1590/abd1806-4841.20163922.