The "Scintigraphic Flip": A Visual Warning Sign of Impending Hematologic Toxicity.
We report a 55-year-old man with metastatic castration-resistant prostate cancer who developed a dramatic "scintigraphic flip" after the second cycle of ¹⁷⁷Lu-PSMA therapy. Post-therapy SPECT and follow-up ¹⁸F-PSMA PET/CT showed increased diffuse marrow uptake with paradoxically reduced salivary-gland and liver activit...