Key Clinical Message:
Lymphadenopathy following recent immunization is usually regional.
Generalized lymphadenopathy should arouse suspicion for alternative
underlying pathology. Prostate adenocarcinoma should be considered in
the differential diagnosis for malignancy in an elderly male patient.
Metastatic prostate adenocarcinoma can have good prognostic outcomes if
treatment is started promptly, even in the setting of widespread
disease.