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Updated: Aug 21, 2026

Direct Reprogramming of Human Fibroblasts into Myoblasts to Investigate Therapies for Neuromuscular Disorders
Published on: April 3, 2021
Multifocal infantile myofibromatosis and generalized fibromuscular dysplasia in a child: evidence for a common
Corrina Wright1, Martin T Corbally, Roisin Hayes
1Department of Pathology, Our Ladys Hospital for Sick Children, Crumlin, Dublin, Ireland.
Abstract:
Infantile myofibromatosis (IM) is a condition characterized by the formation of spindle cell tumors of skin, soft tissue, and viscera. Although small vessel involvement by the process is a frequently identified and indeed diagnostically useful histological finding, involvement of large vessels is not widely reported. Fibromuscular dysplasia (FMD) is a noninflammatory arteriopathy characterized by intimal, medial, and/or adventitial fibroplasias leading to luminal compromise and aneurysm formation. Although venous disease has been reported, involvement of arterioles and viscera has not been identified. We report a patient in whom IM was diagnosed, on the basis of multiple soft tissue tumors present from birth, who subsequently developed generalized and ultimately fatal FMD. These two conditions exhibit overlapping pathologic features, including pronounced intimal fibroplasia. Their occurrence in a single individual may provide insights into the pathogenesis of both conditions, suggesting that they represent part of the same spectrum of vascular myofibroblastic proliferations.
Insights
Infantile myofibromatosis (IM) and fibromuscular dysplasia (FMD) share pathological features. This case suggests IM and FMD may represent a spectrum of vascular myofibroblastic proliferations.
Area of Science:
- Vascular Pathology
- Pediatric Oncology
- Genetics
Background:
- Infantile myofibromatosis (IM) presents as spindle cell tumors in various tissues.
- Fibromuscular dysplasia (FMD) is an arteriopathy causing luminal compromise and aneurysms.
- Large vessel involvement in IM is rarely reported, unlike small vessel involvement.
Observation:
- A patient diagnosed with infantile myofibromatosis (IM) at birth developed generalized fibromuscular dysplasia (FMD).
- The patient's IM presented with multiple soft tissue tumors.
- The subsequent FMD was generalized and ultimately fatal.
Findings:
- Both IM and FMD share overlapping pathological features, notably intimal fibroplasia.
- This case highlights the potential for a single individual to manifest both conditions.
- The co-occurrence suggests a potential link between these distinct vascular conditions.
Implications:
- This case may offer new insights into the pathogenesis of both IM and FMD.
- It suggests that IM and FMD could be part of a broader spectrum of vascular myofibroblastic proliferations.
- Further research into shared pathways could elucidate the development of these vascular disorders.
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