Ultrastructural studies of human prostatic neoplasia

Area of Science:

• Oncology
• Virology
• Cell Biology

Background:

• Human prostatic neoplasia encompasses conditions like prostate carcinoma and benign prostatic hyperplasia.
• The potential role of viral agents in the development of prostate cancer remains an area of investigation.

Purpose of the Study:

• To investigate the presence and morphology of viruslike particles in human prostatic neoplasia using electron microscopy.
• To identify any correlation between viruslike particles and specific prostate pathologies.

Main Methods:

• Electron microscopy was employed to examine 42 human prostatic tissue specimens, including carcinomas, benign hyperplasia, and bladder tumors.
• Detailed morphological analysis was performed on identified intracellular and extracellular structures.

Main Results:

• Intracisternal viruslike particles (150-200 nm) were observed budding from epithelial cells in 4 of 32 prostate carcinomas.
• Particles resembling type C viruses (90-130 nm) were found in cytoplasmic vacuoles in 5 carcinomas and 1 benign hyperplasia case.
• Virus particles were not detected in 15 examined tissue culture specimens.

Conclusions:

• Viruslike particles were identified in a subset of prostate carcinoma and benign hyperplasia cases.
• The precise nature and etiological significance of these particles in human prostatic neoplasia require further investigation.
• Additional cellular ultrastructural findings include intranuclear mitochondria and various inclusions.