The purpose of this poster is to present the first published case of calcific tendinitis of the middle scalene muscle. This will raise awareness and improve diagnosis of this condition. By correctly diagnosing calcific tendinitis of the middle scalene muscle, unnecessary investigations and interventions required for other differential diagnoses that present in a similar manner can be avoided.

Calcific tendinitis occurs due to calcium hydroxyapatite crystal deposition in peri-articular muscle attachments [1]. The condition can affect any joint [1]. Case reports describing calcific tendinitis in locations such as the iliopsoas muscle [2], second digit flexor tendon sheath [3] and rectus femorishave all been published [4]. However, to our knowledge, this is the first documented case of calcific tendinitis affecting the middle scalene muscle. The closest muscle anatomically to the middle scalene reported in the literature to be affected by calcific tendinitis is the...

A 55 year old man presented to the emergency department with two days of severe right sided neck pain and swelling. These symptoms were accompanied by odynophagia and dysphonia. No preceding trauma or infections were reported. C-reactive protein was elevated at 65mg/L (<5.0mg/L) and white cell count was also raised at 11.4 x 109/L (4-11 x 109/L). CT neck with contrast showed a heterogenous area of calcification measuring 13 x 5 x 10mm at the origin of the right middle scalene muscle, as seen in...

This is the first documented case describing calcific tendinitis of the middle scalene muscle and draws both clinical and radiological similarities with acute calcific tendinitis of the longus colli. Imaging findings included calcification at the right middle scalene muscle origin, thickening of the middle scalene muscle and surrounding oedema tracking into the prevertebral space. Identification of calcific tendinitis of the middle scalene is important, as unnecessary workup and management, which may be required for other similar clinical presentations, can be avoided.

1. Siegal D, Wu J, Hochman M. Calcific tendinitis: a pictorial review. Can Assoc Radiol J. 2009; 60(5). doi: 10.1016/j.carj.2009.06.008 2. Henry S, Small T, Cottle D. Unusual presentation of calcific tendinitis of the iliopsoas tendon in a 28-year-old female. ANZ J Surg. 2019;89(9):e398–9. doi 10.1111/ans.14671 3. Hillery T, Mueller M, Rainey H. Atraumatic calcific tendinitis of the second digit flexor tendon sheath: a case report. Am J Phys Med Rehabil. 2021;100(11):e175–e175. doi 10.1097/PHM.0000000000001776 4. Pierannunzii L, Tramontana F, Gallazzi M. Case report: calcific tendinitis...