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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">We present a case of a 38-year-old female with a history of right posterior ankle pain for 2 months which worsened with walking and standing up for a long time&#46; There were no complaints in other joints&#46; On physical examination the patient presented swelling of the posterior ankle and complained of pain with forced flexion of the right feet&#46; There was no increase of inflammation parameters in blood tests&#46; Radiographic lateral view of the right ankle demonstrated an enlarged Stieda&#39;s process &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; The magnetic resonance imaging &#40;MRI&#41; of the right ankle confirmed the Stieda&#39;s process &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41; being able to originate posterior conflict&#44; with a subtle bone marrow edema&#46; A slight effusion was observed in the anterior and posterior compartments of the tibiotalar joint as well as edema of the subcutaneous fat&#46; The patient was told to rest and NSAID were prescribed with resolution of the hindfoot pain&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0010" class="elsevierStylePara elsevierViewall">The posterior ankle impingement syndrome is a condition resulting from soft tissue compression between the posterior process of the calcaneus and the posterior tibia during ankle plantar flexion&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">1</span></a> An important cause of the syndrome is a prominent posterolateral talar process &#40;Stieda&#39;s process&#41; or the presence of os trigonum&#44; due to its impact on adjacent structures&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">2</span></a> Patients usually report chronic or recurrent posterior ankle pain caused or exacerbated by forced plantar flexion&#46;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">3</span></a> Other causes of this syndrome may result from flexor hallucis longus tenosynovitis&#44; ankle osteochondritis&#44; subtalar joint disease&#44; and fracture&#46; Diagnosis of posterior ankle impingement syndrome is based primarily on clinical history and physical examination&#46; Radiography&#44; computed tomography&#44; and MRI are useful to detect associated bone and soft-tissue abnormalities&#46;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">3</span></a> MRI can identify the presence of a Stieda&#39;s process or a separate os trigonum in addition to secondary findings that suggest posterior ankle impingement as well as&#58; increased signal intensity in the soft tissues posterior to the ankle&#44; thickening of the posterior joint capsule&#44; posterior and subtalar synovitis&#44; flexor hallucis longus tenosynovitis and bone marrow edema pattern in the os trigonum and posterior talus&#46;<a class="elsevierStyleCrossRefs" href="#bib0070"><span class="elsevierStyleSup">4&#8211;7</span></a> Symptoms typically improve with nonsurgical management but surgery may be required in refractory cases&#46; A literature review on conservative treatment of the posterior ankle impingement syndrome suggests that the initial treatment should aim at decreasing inflammation with non-steroidal anti-inflammatory drugs and activity restriction &#40;avoidance of forced plantar flexion&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">8</span></a> Furthermore&#44; a physiotherapy program that includes soft tissue therapy&#44; stretching and mobilizations of restricted joints of the lower kinetic chain should be implemented in conjunction with a progressive strengthening&#44; balance and proprioception enhancement program&#46;<a class="elsevierStyleCrossRefs" href="#bib0090"><span class="elsevierStyleSup">8&#44;9</span></a> Cortisone injections can be performed in patients with higher levels of pain&#46; These injections into the affected area may reduce the pain and allow the patient to progress into a rehabilitation program&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">10</span></a> It is also suggested to tape or brace the ankle in a protective dorsiflexion position when the patient undertakes intense activities&#44; such as sports&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">2</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">This case emphasizes the importance of considering posterior ankle impingement due to a Stieda&#39;s process of the talus as a cause of hindfoot pain&#46; In fact&#44; it is an underrecognized cause of posterior ankle pain but imaging can easily make the diagnosis and guide appropriate treatment&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Conflict of interest</span><p id="par0020" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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Vol. 14. Núm. 4.
Páginas 244-245 (julio - agosto 2018)
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Vol. 14. Núm. 4.
Páginas 244-245 (julio - agosto 2018)
Letter to the Editor
Acceso a texto completo
Posterior Ankle Impingement Syndrome
Síndrome del choque posterior del tobillo
Visitas
12544
Nádia Martins
Autor para correspondencia
nadia_filipaem@hotmail.com

Corresponding author.
, Maria Inês Seixas, Maura Couto, Paulo Monteiro
Rheumatology Department, Hospital de São Teotónio, Viseu, Portugal
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Dear Editor,

We present a case of a 38-year-old female with a history of right posterior ankle pain for 2 months which worsened with walking and standing up for a long time. There were no complaints in other joints. On physical examination the patient presented swelling of the posterior ankle and complained of pain with forced flexion of the right feet. There was no increase of inflammation parameters in blood tests. Radiographic lateral view of the right ankle demonstrated an enlarged Stieda's process (Fig. 1). The magnetic resonance imaging (MRI) of the right ankle confirmed the Stieda's process (Fig. 1) being able to originate posterior conflict, with a subtle bone marrow edema. A slight effusion was observed in the anterior and posterior compartments of the tibiotalar joint as well as edema of the subcutaneous fat. The patient was told to rest and NSAID were prescribed with resolution of the hindfoot pain.

Fig. 1.

Lateral right ankle radiography (A), T1 weighted sequence (B) and sagittal STIR MRI sequence (C) images demonstrating an enlarged Stieda's process (arrows) with mild bone marrow and soft tissues edema.

(0.14MB).

The posterior ankle impingement syndrome is a condition resulting from soft tissue compression between the posterior process of the calcaneus and the posterior tibia during ankle plantar flexion.1 An important cause of the syndrome is a prominent posterolateral talar process (Stieda's process) or the presence of os trigonum, due to its impact on adjacent structures.2 Patients usually report chronic or recurrent posterior ankle pain caused or exacerbated by forced plantar flexion.3 Other causes of this syndrome may result from flexor hallucis longus tenosynovitis, ankle osteochondritis, subtalar joint disease, and fracture. Diagnosis of posterior ankle impingement syndrome is based primarily on clinical history and physical examination. Radiography, computed tomography, and MRI are useful to detect associated bone and soft-tissue abnormalities.3 MRI can identify the presence of a Stieda's process or a separate os trigonum in addition to secondary findings that suggest posterior ankle impingement as well as: increased signal intensity in the soft tissues posterior to the ankle, thickening of the posterior joint capsule, posterior and subtalar synovitis, flexor hallucis longus tenosynovitis and bone marrow edema pattern in the os trigonum and posterior talus.4–7 Symptoms typically improve with nonsurgical management but surgery may be required in refractory cases. A literature review on conservative treatment of the posterior ankle impingement syndrome suggests that the initial treatment should aim at decreasing inflammation with non-steroidal anti-inflammatory drugs and activity restriction (avoidance of forced plantar flexion).8 Furthermore, a physiotherapy program that includes soft tissue therapy, stretching and mobilizations of restricted joints of the lower kinetic chain should be implemented in conjunction with a progressive strengthening, balance and proprioception enhancement program.8,9 Cortisone injections can be performed in patients with higher levels of pain. These injections into the affected area may reduce the pain and allow the patient to progress into a rehabilitation program.10 It is also suggested to tape or brace the ankle in a protective dorsiflexion position when the patient undertakes intense activities, such as sports.2

This case emphasizes the importance of considering posterior ankle impingement due to a Stieda's process of the talus as a cause of hindfoot pain. In fact, it is an underrecognized cause of posterior ankle pain but imaging can easily make the diagnosis and guide appropriate treatment.

Conflict of interest

The authors declare that they have no conflicts of interest.

References
[1]
P. Robison, L.M. White.
Soft-tissue and osseous impingement syndrome of the ankle: role of imaging in diagnosis and management.
Radiographics, 22 (2002), pp. 1457-1471
[2]
J. Maquirriain.
Posterior ankle impingement syndrome.
J Am Acad Orthop Surg, 13 (2005), pp. 365-371
[3]
J Am Acad Orthop Surg, 13 (2005), pp. 365-371
[4]
K.A. Peace, J.C. Hillier, A. Hulme, J.C. Healy.
MRI features of posterior ankle impingement syndrome in ballet dancers: a review of 25 cases.
Clin Radiol, 59 (2004), pp. 1025-1033
[5]
N.J. Bureau, E. Cardinal, R. Hobden, B. Aubin.
Posterior ankle impingement syndrome: MR imaging findings in seven patients.
[6]
C.J. Wakeley, D.P. Johnson, I. Watt.
The value of MR imaging in the diagnosis of the os trigonum syndrome.
Skelet Radiol, 25 (1996), pp. 133-136
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C.M.A.O. Lima, S.B. Ribeiro, E.P.D. Coutinho, E.M. Vianna, R.C. Domingues, A.C.C. Júnior.
Magnetic resonance imaging of ankle impingement syndrome: iconographic essay.
Radiol Bras, 43 (2010), pp. 53-57
[8]
T. Soler, R. Jezerskyte Banfi, L. Katsmen.
The conservative treatment of posterior ankle impingement syndrome in professional ballet dancers: a literature review and experts consensus.
Eur Sch Physiother, (2011), pp. 1-24
[9]
E. Verhagen, A. van der Beek, J. Twisk, L. Bouter, R. Bahr, W. van Mechelen.
The effect of a proprioceptive balance board training program for the prevention of ankle sprains: a prospective controlled trial.
Am J Sports Med, 32 (2004), pp. 1385-1393
[10]
P. Luk, D. Thordarson, T. Charlton.
Evaluation and management of posterior ankle pain in dancers.
J Dance Med Sci, 17 (2013), pp. 79-83
Copyright © 2017. Elsevier España, S.L.U. and Sociedad Española de Reumatología y Colegio Mexicano de Reumatología
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