CC BY-NC-ND 4.0 · Revista Chilena de Ortopedia y Traumatología 2021; 62(03): e232-e236
DOI: 10.1055/s-0041-1739538
Reporte de Caso | Case Report

Traumatic Myositis Ossificans in a Newborn: A Case Report

Article in several languages: español | English
1  Hospital San Juan de Dios Curicó, Curicó, Chile
2  Facultad de Ciencias Médicas, Universidad de Talca de Chile, Curicó, Chile
2  Facultad de Ciencias Médicas, Universidad de Talca de Chile, Curicó, Chile
2  Facultad de Ciencias Médicas, Universidad de Talca de Chile, Curicó, Chile
› Author Affiliations
Funding The authors have no sources of funding to disclose regarding the present study.


Traumatic myositis ossificans (TMO) is a disorder in which heterotopic ossification occurs two to four weeks after one or multiple traumas. The goal of the present article is to describe the clinical and radiological characteristics of a case of TMO in a newborn (NB) after a peripheral intravenous cannulation, a rare procedure in the clinical practice of neonatology. The patient is a premature 33-week-old NB who, 20 days after birth, presented with a 3 cm x 2 cm lump in the distal third of the left forearm that did not seem to cause pain or to limit movement, and with no evidence of infection. The rest of the physical exam was within normal limits. Three weeks before the lesion, a peripheral intravenous catheter (PIVC) was placed in that area. A radiograph of the left forearm showed soft-tissue calcification without disruption of adjacent bone structures. Ultrasound revealed a focal, oval soft tissue lesion with partially-defined borders and posterior acoustic shadow; the rest of study showed normal long bones. The serum levels of alkaline phosphatase, calcium, and phosphorus were all normal. In view of the tumor lesion on the physical examination and the calcified image in soft-tissue on plain X-ray and a recent history of PIVC microtrauma, we reached to the diagnoses of TMO. During the follow-up, the lesion decreased in size until it completely disappeared four months after the diagnosis. No radiological control was needed. Uncommon in NBs, TMO is generally self-limited and with a good prognosis.

Publication History

Received: 08 August 2019

Accepted: 06 August 2021

Publication Date:
22 December 2021 (online)

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