Penile Metastasis-Induced Priapism as the First Sign of Lung Cancer: A Case Report and Review of the Literature.

The penis is a relatively uncommon organ for metastases. Secondary lesions often originate from the bladder, prostate, or rectosigmoid cancers. Only a few cases have described penile lesions secondary to lung cancers, mostly as a later complication. We hereby report the case of an 86-year-old male patient who presented with a 3-week-long nonpainful priapism. A penile Doppler ultrasound and a chest and abdominal CT scan were performed, showing a left hilar lung mass as well as lesions in the liver, the adrenal glands, the pancreas, bone structures, and the penis. Penile metastasis is associated with a poor prognosis because of the frequent disseminated malignant lesions in other sites. Malignant priapism should be suspected, especially in patients with no evident risk factors for priapism (hematological diseases, drugs, alcohol, neurological diseases, or metabolic disorders).