Congenital Partial Absence of Trapezius with Variant Pattern of Rectus Sheath.
Musculocutaneous pedicled/free flaps are an essential prerequisite for reconstructive surgery. Amongst the trunk muscles commonly harvested for flaps, the trapezius and rectus abdominis provide satisfactory coverage for cranial and trunk defects. unilateral/bilateral or partial congenital absence of trapezius muscle is well documented and may result in muscular imbalances compromising posture and limb movements. During routine cadaveric dissection, we encountered a case of bilateral partial absence of occipital part of the trapezius muscle. Concurrently, the ventral abdominal musculature displayed the aponeurosis of transversus abdominis muscle solely forming the posterior wall of the rectus sheath. These conjointly occurring anomalies advocate a compensatory strengthening of the anterior wall of rectus sheath in response to the congenital absence of occipital part of the trapezius, probably to counteract the postural instability. The present study focuses on recognition of compensatory mechanisms resulting from congenital variations as identification of such processes may prevent chronic debilitating conditions.
['Tigga|Sarika Rachel|SR|', 'Goswami|Preeti|P|', 'Khanna|Jugesh|J|']
D000009:Abdominal Muscles D034861:Abdominal Wall D005205:Fascia D006801:Humans D008297:Male D008875:Middle Aged D019651:Reconstructive Surgical Procedures D017568:Rectus Abdominis D064171:Superficial Back Muscles D013524:Surgical Flaps
Trapezius Rectus sheath Transversus abdominis Congenital variations