Fusarium species are a group of fungi that cause superficial infections, locally invasive and disseminated disease, which occur mainly in immunocompromised hosts, and occasionally in immunocompetent individuals. We present three cases that show three different clinical forms of Fusarium spp. disease that affected different types of patients (patients with hematological malignancy, chronic kidney disease in peritoneal dialysis and post-surgical for osteoarticular pathology), each with its own characteristics that merit discussion. These cases show different clinical forms of invasive fusariosis caused by Fusarium solani complex species in patients with different pathologies and therapeutic management that could be risk factors for the development of the disease. The clinical recognition of fusariosis, not only in oncohematological patients, together with a timely diagnosis and treatment contribute to the success of the treatment and a reduction in mortality.