Neurocutaneous melanosis associated with inferior vermian hypoplasia: Mr findings

Sheung Fat Ko, Huei Shyong Wang, Tai Ngar Lui, Shu Hang Ng, Yat Sun Ho, Chung Chueng Tsai

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Objective: We describe the MR findings of two cases of neurocutaneous melanosis (NCM) associated with inferior vermian hypoplasia (IVH). Materials and Methods: Two cases of NCM associated with IVH are pre-sented. Both patients had congenital giant hairy nevi and multiple satellite lesions. Results: Magnetic resonance imaging revealed IVH as well as hyperintensities in the pons and the cerebellar leptomeninges on Tl-weighted images. The hyperintensities may be ascribed to the Tl-shortening effect of melanin. A right parietal tumor in one patient and unilateral ventriculomegaly in another patient were also depicted. Conclusions: Magnetic resonance demonstration of the Tl-shortening lepto- meningeal infiltrations adds weight to the diagnosis of NCM. The implication of the concurrence of NCM and IVH is discussed.

Original languageEnglish
Pages (from-to)691-695
Number of pages5
JournalJournal of Computer Assisted Tomography
Issue number5
Publication statusPublished - 1993
Externally publishedYes


  • Inferior vermian hypoplasia
  • Magnetic resonance imaging
  • Neurocutaneous melanosis

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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