Myositis Ossificans at the Left Deltoid Muscle. Case Report of Uncommon Lesion and a Brief Review of the Literature

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Autori principali: Mohamed, Aziz, Sunny, Rampuria, Ladarius, Armstrong, Arko, Saha, Deshon, Fisher, Obinna, Madu, Amani, Heslop, Samira, Fitzhenry, Garrett, Harris, Jessica, Jahoda
Natura: Recurso digital
Lingua:inglese
Pubblicazione: Zenodo 2025
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author Mohamed, Aziz
Sunny, Rampuria
Ladarius, Armstrong
Arko, Saha
Deshon, Fisher
Obinna, Madu
Amani, Heslop
Samira, Fitzhenry
Garrett, Harris
Jessica, Jahoda
author_facet Mohamed, Aziz
Sunny, Rampuria
Ladarius, Armstrong
Arko, Saha
Deshon, Fisher
Obinna, Madu
Amani, Heslop
Samira, Fitzhenry
Garrett, Harris
Jessica, Jahoda
contents <p><strong><u><span lang="EN-US">ABSTRACT:</span></u></strong></p> <p><span lang="EN-US">Myositis ossificans (MO) is a benign condition of heterotopic ossification of soft tissues, typically secondary to trauma. The most common areas affected by MO are the thigh and upper arm. Involvement of the shoulder is uncommon. It may have clinical and radiological similarities with other benign and malignant soft tissue tumors, thus making diagnosis problematic. We report a case of a 29-year-old healthy athletic male who had been experiencing a painful enlarging mass of the left shoulder over the past three months. There was no recent history of trauma; however, the patient reported a previous history of left shoulder dislocation managed conservatively with no complications. Imaging demonstrated a well-defined heterogeneous calcified intramuscular mass with peripheral ossification. A multidisciplinary tumor board advised a tissue biopsy. Histologically, the typical zonal pattern of MO with peripheral mature bone and central immature osteoid was observed, without cytologic atypia. En bloc surgical excision was conducted because of increasing pain, the large size of the lesion, and the lesion's maturity. There were no postoperative complications with an uneventful postoperative course, and 4 years after follow-up, there was no recurrence. This case illustrates the importance of integrating clinical, radiological, and pathological findings in diagnosing MO, particularly at an unusual site, as in our case, the shoulder. It is important to recognize its characteristic features to avoid misinterpretation and unwarranted aggressive management with the diagnosis of malignancy.</span></p>
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spellingShingle Myositis Ossificans at the Left Deltoid Muscle. Case Report of Uncommon Lesion and a Brief Review of the Literature
Mohamed, Aziz
Sunny, Rampuria
Ladarius, Armstrong
Arko, Saha
Deshon, Fisher
Obinna, Madu
Amani, Heslop
Samira, Fitzhenry
Garrett, Harris
Jessica, Jahoda
Myositis ossificans, Heterotopic ossification, Benign, Zonal pattern, Nontraumatic
<p><strong><u><span lang="EN-US">ABSTRACT:</span></u></strong></p> <p><span lang="EN-US">Myositis ossificans (MO) is a benign condition of heterotopic ossification of soft tissues, typically secondary to trauma. The most common areas affected by MO are the thigh and upper arm. Involvement of the shoulder is uncommon. It may have clinical and radiological similarities with other benign and malignant soft tissue tumors, thus making diagnosis problematic. We report a case of a 29-year-old healthy athletic male who had been experiencing a painful enlarging mass of the left shoulder over the past three months. There was no recent history of trauma; however, the patient reported a previous history of left shoulder dislocation managed conservatively with no complications. Imaging demonstrated a well-defined heterogeneous calcified intramuscular mass with peripheral ossification. A multidisciplinary tumor board advised a tissue biopsy. Histologically, the typical zonal pattern of MO with peripheral mature bone and central immature osteoid was observed, without cytologic atypia. En bloc surgical excision was conducted because of increasing pain, the large size of the lesion, and the lesion's maturity. There were no postoperative complications with an uneventful postoperative course, and 4 years after follow-up, there was no recurrence. This case illustrates the importance of integrating clinical, radiological, and pathological findings in diagnosing MO, particularly at an unusual site, as in our case, the shoulder. It is important to recognize its characteristic features to avoid misinterpretation and unwarranted aggressive management with the diagnosis of malignancy.</span></p>
title Myositis Ossificans at the Left Deltoid Muscle. Case Report of Uncommon Lesion and a Brief Review of the Literature
topic Myositis ossificans, Heterotopic ossification, Benign, Zonal pattern, Nontraumatic
url https://doi.org/10.5281/zenodo.15637302