Patienter, som fik konkomitant TMZ og strålebehandling i en pilotundersøgelse af det længerevarende 42- dages program, viste sig at have særlig risiko for at udvikle Pneumocystis carinii lungebetændelse (PCP).
Patients who received concomitant TMZ and RT in a pilot trial for the prolonged 42-day schedule were shown to be at particular risk for developing Pneumocystis carinii pneumonia (PCP).