Myositis Ossificans at the Left Deltoid Muscle. Case Report of Uncommon Lesion and a Brief Review of the Literature
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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> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_15637302 |
| institution | Zenodo |
| language | eng |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| 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 |