Location
Suwanee, GA
Start Date
17-4-2026 12:00 PM
End Date
17-4-2026 1:00 PM
Description
Introduction
Anatomical variations of the psoas major are uncommon but may be clinically significant due to their potential relationship with nearby neurovascular structures. Variations in the morphology of the psoas major may have implications for surgical procedures or nerve entrapment syndromes.
Methods
This case report is based on an abnormal splitting of the psoas muscle noted during a routine cadaveric dissection of a 79-year-old female. Pictures were taken to document the abnormality.
Results
The right psoas major had an accessory muscle body that inserted onto the iliacus rather than the lesser trochanter of the femur, which is the typical insertion of the muscle in normal anatomy. The femoral nerve emerged from the space between the primary psoas major muscle and the accessory muscle body. The left psoas major demonstrated normal anatomy with no accessory structures.
Discussion
Clinically, the presence of this accessory body may contribute to nerve compression, resulting in femoral neuropathy that could present with weakness in the lower extremities, pain, numbness, or tingling in the anterior thigh.
Embargo Period
6-1-2026
Included in
Abnormal attachment of the psoas major fibers: A Cadaveric Case Report
Suwanee, GA
Introduction
Anatomical variations of the psoas major are uncommon but may be clinically significant due to their potential relationship with nearby neurovascular structures. Variations in the morphology of the psoas major may have implications for surgical procedures or nerve entrapment syndromes.
Methods
This case report is based on an abnormal splitting of the psoas muscle noted during a routine cadaveric dissection of a 79-year-old female. Pictures were taken to document the abnormality.
Results
The right psoas major had an accessory muscle body that inserted onto the iliacus rather than the lesser trochanter of the femur, which is the typical insertion of the muscle in normal anatomy. The femoral nerve emerged from the space between the primary psoas major muscle and the accessory muscle body. The left psoas major demonstrated normal anatomy with no accessory structures.
Discussion
Clinically, the presence of this accessory body may contribute to nerve compression, resulting in femoral neuropathy that could present with weakness in the lower extremities, pain, numbness, or tingling in the anterior thigh.