Vascular structure of outer myometrial uterine leiomyomata : a preliminary sem and immunohistochemical study

Aim: The main goal of this study was assessment of vascular structure of uterine leiomyomata localized between outer myometrium and endometrium. Materials and Methods: The study was carried out on thirty two human uteri collected upon autopsy. Vessels were injected with synthetic resin, next corroded and coated with gold, finally observed using scanning electron microscope. Next ten uteri were injected with acrylic emulsion and studies using immunohistochemical staining for von Willebrandt’s factor. Results: Vascular structure of outer myometrial leiomyomata was quite similar to those observed in the middle of muscular layer of uterus, characterized by relatively dense ‘vascular capsule’, consisted of flattened vein, arterioles and capillaries. Conclusions: Structure of outer myometrial uterine leiomyomata was similar to those observed during growth within myometrium

Anatomical variability and histological structure of the ulnar nerve in the Guyon's canal

Objectives The goal of our study was to analyze the prevalence of variations, branching patterns, and histology of the ulnar nerve (UN) in Guyon’s canal to address its importance in hand surgery, particularly decompression of the UN. Methods Fifty fresh cadavers were dissected bilaterally, and the nerve in the area of Guyon’s canal was visualized. Samples for histology were also taken and prepared. The collected data were then analyzed. Results Morphometric measurements of the hands and histological studies were not found to have significant differences when compared by left or right side or by sex. Three major branching patterns were found, with division into deep and superficial UN being the most common (85%). Additional findings included a majority (70%) presenting with a cutaneous branch within the canal and/or with an anastomosis of its distant branches with those of the median nerve (57%). Conclusion The UN is most commonly found to divide into a superficial and deep ulnar branch within Guyon’s canal. However, additional branches and anastomoses are common and should be taken into careful consideration when approached during surgery in the area, particularly during decompression procedures of Guyon’s canal