NEPC Symptoms

In its early stages, NEPC often mimics regular prostate cancer with urinary problems. These include a weak or interrupted urine stream, needing to urinate frequently, especially at night, pain or difficulty urinating, and new-onset erectile dysfunction. Blood in the urine or semen may also appear. A key symptom of NEPC is rapid disease progression even though PSA levels stay low. This occurs because NEPC cells stop relying on androgens, so PSA drops while the cancer spreads quickly. Doctors look for higher levels of blood markers like chromogranin A and neuron-specific enolase, which were found in almost half of NEPC patients studied. As the disease progresses, patients typically experience significant fatigue and unexplained weight loss, bone pain, especially in the back, hips, or thighs, pelvic pain, sometimes severe due to large tumor masses, swelling or fluid buildup in the legs, changes in bowel habits or rectal pressure, tenesmus. In some cases, symptoms from hormone secretion like skin flushing or diarrhea. NEPC often causes sudden, aggressive clinical decline much faster than typical prostate cancer because the tumor resists standard hormone-blocking treatments entirely. This resistance is linked to loss of androgen receptor signaling and increased expression of neuroendocrine cell markers.