Basal cell carcinoma of the prostate diagnosed incidentally with holmium laser enucleation of the prostate: How can we detect prior to benign prostatic hyperplasia surgery?

INTRODUCTION: Basal cell carcinoma of the prostate is a rare prostate malignancy. Its diagnosis and treatment have not been well established yet. CASE PRESENTATION: An 80-year-old man was referred to our hospital for undergoing holmium laser enucleation of the prostate with persistent lower urinary tract symptoms. Ultrasonography showed enlarged prostate (41.3 cc) with mid-lobe hypertrophy. His prostate-specific antigen and testosterone levels were 0.437 ng/mL and 873 ng/dL, respectively. Histological examination of the enucleated tissue confirmed basal cell carcinoma. The cells were positive for bcl-2, 34βE12, p63, and cytokeratin 5/6. Ki-67 labeling index was 5%. Subsequent staging computed tomography scan and bone scintigram showed neither lymph node nor distant metastasis. Currently, the patient is under close follow-up with imaging, endoscopy, and urodynamic study. CONCLUSION: It is difficult for physicians to detect prostate basal cell carcinoma before benign prostatic hyperplasia surgery. In case of organ-confined disease, age and Ki-67 labeling index could be suggestive of subsequent treatment decision-making.