SEM and X-ray microanalysis of human prostatic calculi

Area of Science:

• Urology
• Biomineralization
• Materials Science

Background:

• Nodular hyperplasia is a common condition affecting the prostate gland.
• Prostate calculi, or stones, are frequently found in hyperplastic prostates.
• The composition and formation of these calculi are not fully understood.

Purpose of the Study:

• To characterize the morphology and elemental composition of human prostate calculi.
• To identify potential differences in calculi associated with nodular hyperplasia.
• To explore the genesis of prostate calculi.

Main Methods:

• Scanning electron microscopy (SEM) for morphostructural analysis.
• Energy-dispersive X-ray analysis (EDAX) for elemental composition.
• Analysis of calculi removed from human prostates with nodular hyperplasia.

Main Results:

• The general elemental spectrum included Sodium (Na), Aluminum (Al), Magnesium (Mg), Sulfur (S), Phosphorus (P), Calcium (Ca), and Zinc (Zn).
• Two distinct types of calculi were identified: Type I with a nodular surface and high sulfur peaks, and Type II with a polyfaceted surface and high phosphorus and calcium peaks.
• Superficial zinc deposits were observed, likely from prostatic fluid, with no apparent role in calculus genesis.

Conclusions:

• Prostate calculi in nodular hyperplasia exhibit distinct morphostructural and microanalytical characteristics.
• The findings suggest varied formation mechanisms for different calculi types, potentially involving corpora amylacea or exogenous materials.
• Elemental analysis provides insights into the biomineralization processes within the prostate.