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Detection of endometrial pinopodes by light microscopy
O H Develioglu1, G Nikas, J G Hsiu
1The Jones Institute for Reproductive Medicine, Eastern Virginia Medical School, Norfolk, Virginia, USA.
Fertility and Sterility
|October 6, 2000
Summary
Light microscopy (LM) can preliminarily assess endometrial surface morphology. However, scanning electron microscopy (SEM) remains definitive for evaluating pinopodes, especially when LM shows few or moderate projections.
Area of Science:
- Reproductive biology
- Histopathology
- Infertility research
Background:
- Endometrial pinopodes are crucial indicators of uterine receptivity.
- Accurate assessment of pinopodes is vital for understanding implantation windows.
- Light microscopy (LM) is a standard diagnostic tool, but its utility for pinopode evaluation is debated.
Purpose of the Study:
- To evaluate the diagnostic value of light microscopy (LM) in assessing endometrial pinopodes.
- To compare LM findings with scanning electron microscopy (SEM) for pinopode identification and staging.
Main Methods:
- A comparative histologic study was conducted on endometrial biopsies from 18 oocyte donors.
- Endometrial surface projections were assessed using LM, and pinopodes were evaluated using SEM.
- Biopsies were collected during the luteal phase (days 14-24) of the menstrual cycle.
Main Results:
- LM identified the endometrial luminal surface in 36 of 38 specimens.
- Abundant apical projections observed via LM correlated with pinopode presence by SEM.
- However, LM lacked predictive value for pinopode developmental stage, with SEM being superior for detailed evaluation.
Conclusions:
- LM can serve as a preliminary tool for evaluating endometrial surface morphology.
- While abundant LM projections suggest pinopode presence, SEM is the definitive method for accurate pinopode identification and staging.
- SEM is essential for cases with limited or moderate projections observed under LM.