Pontine tegmental cap dysplasia with a duplicated internal auditory canal

Donald Chan, Daniel L. Veltkamp, Nilesh K. Desai, Cory M. Pfeifer

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Pontine tegmental cap dysplasia (PTCD) is a rare neurological syndrome that results in a hypoplastic ventral pons, tegmental cap at the dorsal pons, and cranial nerve dysfunction. The most common symptoms are hearing loss and speech problems. We present a case of a 9-month-old male who presented with developmental delay and hypotonia. Magnetic resonance imaging revealed ectopic dorsal transverse pontine fibers and a cap-like protrusion of the dorsal pons. Diffusion tensor imaging showed that the ventral pontine fibers were absent. The cause of PTCD is undiscovered, but proposed hypotheses include dysfunction in axonal guidance, neuronal migration, and ciliary protein function. PTCD is a rare neurological disorder, but the diagnosis can be suggested with MRI using diffusion tensor imaging as an aid.

Original languageEnglish (US)
Pages (from-to)825-828
Number of pages4
JournalRadiology Case Reports
Issue number7
StatePublished - Jul 2019


  • Duplicated IAC
  • Pontine tegmental cap dysplasia

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


Dive into the research topics of 'Pontine tegmental cap dysplasia with a duplicated internal auditory canal'. Together they form a unique fingerprint.

Cite this