Metastatic prostatic carcinoma to the scalp, simulating a large sebaceous cyst, occurred in a 60-year-old man. Review of the literature reveals only two previous reports. Although cutaneous metastases of carcinoma of the prostate are of relatively infrequent occurrence, it is well to emphasize that such metastases may be limited to the scalp, and a diagnosis established by its recognition and a cutaneous biopsy.
Peison B. Metastasis of Carcinoma of the Prostate to the ScalpSimulation of a Large Sebaceous Cyst. Arch Dermatol. 1971;104(3):301-303. doi:10.1001/archderm.1971.04000210075014