Sternalis Muscle- Rare Presentation in Routine Surgical Practice
Published: 2020-12-29
Page: 388-392
Issue: 2020 - Volume 3 [Issue 2]
Theebanraja Ramalingam *
Department of Surgery, School of Medical Science, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia. and Department Surgery, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia.
Maya Mazuwin Yahya
Department of Surgery, School of Medical Science, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia. and Department Surgery, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia. and Breast Cancer Awareness and Research Unit, Hospital Universiti Sains, Malaysia.
Siti Rahmah Bt Hashim Isa Merican
Department of Surgery, School of Medical Science, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia. and Department Surgery, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia.
Wan Zainira Wan Zain
Department of Surgery, School of Medical Science, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia. and Department Surgery, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia.
Zaidi Zakaria
Department of Surgery, School of Medical Science, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia. and Department Surgery, Hospital Universiti Sains, Malaysia, Kelantan, Malaysia.
*Author to whom correspondence should be addressed.
Abstract
During routine mastectomy dissection of an anterior chest wall mass, a unilateral appearance of the right sternalis muscle (SM) was observed. It originated from the sternal part of the right sternocleidomastoid muscle (SCM). The right SM muscle fibres travelled down inferior laterally and inserted on the ipsilateral 5th–7th ribs and the aponeurosis of the external oblique muscle. The innervation to the muscle could be traced to the 4th, 5th, and 6th anterior intercostal nerves. Awareness of the location of the sternalis will help medical doctors avoid misdiagnosis during mammography or misjudgement during breast surgery. Because of its superior attachment to the SCM, clinicians need to be aware of such an anomaly.
Keywords: Sternalis muscle, rare entity, unilateral, clinical significance.