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.

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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