Biochemical analysis of a lithopedion

Area of Science:

• Pathology
• Biochemistry
• Forensic Medicine

Background:

• Lithopedions, or stone fetuses, are extremely rare occurrences, with only 330 cases documented in medical literature.
• This case involves a calcified lithopedion discovered incidentally in the abdominal cavity of a 69-year-old female.

Purpose of the Study:

• To conduct a comprehensive analysis of a rare calcified lithopedion.
• To investigate the chemical composition, tissue preservation, and enzymatic activity within the lithopedion.

Main Methods:

• Macroscopic and microscopic examination of the lithopedion.
• Dry weight studies to assess dehydration (mummification).
• Quantitative chemical analysis of inorganic constituents and comparison with normal tissues.
• Enzyme assays for lactate dehydrogenase (LDH) and creatine kinase (CK) isoenzymes.

Main Results:

• Macroscopically, lithopedion organs were distinguishable; microscopically, only skeletal muscle structure was well-preserved.
• Dry weight studies confirmed mummification.
• Chemical analysis showed a significant decrease in K and Cl, and increases in Mg, P, Na, and Ca, consistent with calcification.
• LDH and CK isoenzymes were detected in liver, muscle, and brain tissues, indicating some level of enzyme reactivation.

Conclusions:

• The chemical and histological findings are consistent with extensive tissue calcification and dehydration.
• Evidence of enzyme reactivation in certain tissues suggests potential biochemical processes even after prolonged dormancy.
• This case provides valuable data on the composition and post-mortem changes in lithopedions.