Four cycles of TIP as second-line therapy achieved a durable CR rate in a high proportion of patients with relapsed testicular GCT. The high CR rate emphasizes the importance of patient selection according to prognostic factors to achieve a favorable outcome to conventional-dose salvage therapy.
Chemotherapy for MT limited to a single cell type may result in major responses and long-term survival in selected patients. Local therapy after chemotherapy is an important component of treatment to achieve maximum response.
Background: Human male germ cell tumors (GCTs) arise from undifferentiated primordial germ cells (PGCs), a stage in which extensive methylation reprogramming occurs. GCTs exhibit pluripotentality and are highly sensitive to cisplatin therapy. The molecular basis of germ cell (GC) transformation, differentiation, and exquisite treatment response is poorly understood.
These results suggest that there is a subgroup of NSGCT patients with embryonal carcinoma (with or without other histologies) with a specific tumor biology profile (high Ki67, low apoptosis, and low p53) whose survival is better than that of the overall patient group. The unexpectedly good outcome for the prominent cluster and independent-risk status suggest that subgroups of GCT reflecting different abilities to respond to treatment exist within IGCCCG prognostic categories.
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