Growing teratoma syndrome presented as a left forearm mass: A case report.

Growing teratoma syndrome (GTS) is a rare disease occurring in patients with non-seminomatous germ cell tumors (NSGCT), which is characterized by enlarging masses in the presence of normal tumor markers either during or after completion of chemotherapy. The disease is chemo-resistant and radio-resistant and complete surgical removal offers the best chance of long-term survival. GTS was first described by Logothetis et al. in 1982, who designated criteria to diagnose this rare entity [1]. The fact that GTS is not common leads to delays in diagnosis and surgical intervention. This case report refers to a testicular growing teratoma with its first clinical manifestation being a gigantic forearm mass.