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Congress: ECR24
Poster Number: C-11965
Type: EPOS Radiographer (scientific)
Authorblock: J-P. Grunz, A. Kunz, H. Huflage, K. S. Luetkens, T. A. Bley, C. Elsner; Würzburg/DE
Disclosures:
Jan-Peter Grunz: Consultant: Siemens Healthineers
Andreas Kunz: Consultant: Siemens Healthineers
Henner Huflage: Nothing to disclose
Karsten Sebastian Luetkens: Nothing to disclose
Thorsten A Bley: Consultant: Siemens Healthineers
Clara Elsner: Nothing to disclose
Keywords: Anatomy, Extremities, Musculoskeletal soft tissue, MR, Contrast agent-intravenous, Normal variants, Epidemiology
Purpose The flexor digitorum superficialis (FDS) is the largest among the superficial flexor muscles situated in the anterior compartment of the forearm and plays a pivotal role in finger flexion, enabling essential hand movements for daily activities. It is known for its complex structure with many anatomical variances (e.g., anomalous muscle bellies, anomalous tendon arrangement, or intermediate tendons) that are still the subject of ongoing research. The clinical significance of the many different anatomic variations of the FDS includes not only...
Read more Methods and materials MRI examinations of the forearm performed between 2010 and 2021 (89 patients, 41 women, 39.3 ± 21.3 years) were reviewed by two radiologists, who evaluated the studies for the presence of the chiasma antebrachii and assessed its length, as well as its distance from the distal radioulnar and elbow joints. In order to verify the image findings in anatomical dissection studies, the forearms of eleven formalin-fixated body donors from the local anatomical institute were additionally assessed.
Read more Results The chiasma antebrachii was identified in the distal third of the forearm in 88 patients (98.9%), while one intersection was located more proximally in the middle part. The chiasma had a median length of 28 mm (interquartile range: 24–35 mm). Its median distances to the distal radioulnar and elbow joint were 16 mm (8–25 mm) and 215 mm (187–227 mm), respectively. The best MRI sequence for its depiction was found to be a T1-weighted post-contrast sequence (71 cases, 79.8%), followed...
Read more Conclusion With this study, we provide new insights into the complex anatomy of the flexor digitorum superficialis with a specific focus on the chiasma antebrachii. Our results not only support the initial description of the chiasma by Ergün et al. but also emphasize its significance as a key anatomic feature that can be observed in nearly all individuals. Furthermore, this research might serve as a foundation for future studies exploring the clinical implications of the chiasma antebrachii in conditions such as...
Read more References [1] Ergun, S.; Ghoreishi, Y.; Hubner, S.; Grunz, J.P.; Huflage, H.; Bley, T.A.; Wagner, N.; Naumann, M. Old name, new face: A systematic analysis of flexor digitorum superficialis muscle with “chiasma antebrachii”. Ann. Anat. 2023, 247, 152052.[2] Turunen, M.J.; Khayyeri, H.; Guizar-Sicairos, M.; Isaksson, H. Effects of tissue fixation and dehydration on tendon collagen nanostructure. J. Struct. Biol. 2017, 199, 209–215.[3] Dylevsky I. The origin and the developmental explanation of some known variations of flexor digitorum superficialis and profundus. Anthropologie...
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