Multiple and Recurrent Squamous Cell Carcinoma of the Oral Cavity After Graft-Versus-Host Disease.

Oral squamous cell carcinoma (OSCC) is one of the most common secondary solid tumors in patients who have undergone hematopoietic stem cell transplantation (HSCT). However, according to previous reports, multiple and recurrent OSCC is very rare. The presented case shows the susceptibility to the development of secondary malignancies, particularly oral cancer, of patients who present with chronic graft-versus-host disease after HSCT. OSCC after HSCT appears to be more invasive and has a tendency to recur, with a poor prognosis. Therefore, regular and thorough evaluations of the oral mucosa are recommended for all patients who undergo bone marrow transplantation and have chronic graft-versus-host disease.