Foramen magnum stenosis from overgrowth of the opisthion in a child with achondroplasia

Case report

Ruchira M. Jha, Paul Klimo, Edward R. Smith

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Achondroplasia has a known association with foramen magnum stenosis that can result in cervicomedullary compression, which is most often due to a hypertrophied posterior occipital rim and an undersized transverse diameter. The authors present a unique case of a child with achondroplasia with symptomatic craniocervical compression from marked overgrowth of his opisthion anterior to the posterior arch of the atlas. This 22-month-old child with achondroplasia presented with severe respiratory and motor disabilities, including progressive quadriparesis and apneic episodes requiring continuous positive airway pressure. Magnetic resonance imaging and CT scans revealed marked foramen magnum stenosis from overgrowth of the opisthion, a hypoplastic C-1 ring, and spinal cord edema at the cervicomedullary junction. Foramen magnum decompression and a C-1 laminectomy were performed. Postoperatively, steady motor improvement has been observed and the patient no longer requires ventilatory support. To the authors' knowledge, this is the first report of this unusual anatomical entity.

Original languageEnglish (US)
Pages (from-to)136-138
Number of pages3
JournalJournal of Neurosurgery: Pediatrics
Volume2
Issue number2
DOIs
StatePublished - Aug 1 2008
Externally publishedYes

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Achondroplasia
Foramen Magnum
Pathologic Constriction
Quadriplegia
Continuous Positive Airway Pressure
Laminectomy
Atlases
Decompression
Edema
Spinal Cord
Magnetic Resonance Imaging

All Science Journal Classification (ASJC) codes

  • Surgery
  • Pediatrics, Perinatology, and Child Health
  • Clinical Neurology

Cite this

Foramen magnum stenosis from overgrowth of the opisthion in a child with achondroplasia : Case report. / Jha, Ruchira M.; Klimo, Paul; Smith, Edward R.

In: Journal of Neurosurgery: Pediatrics, Vol. 2, No. 2, 01.08.2008, p. 136-138.

Research output: Contribution to journalArticle

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