Mucolipidosis IV: A milder form with novel mutations and serial MRI findings

Takashi Shiihara, Mio Watanabe, Kengo Moriyama, Yasuhiro Maruyama, Atsuo Kikuchi, Natsuko Arai-Ichinoi, Mitsugu Uematsu, Kiyoko Sameshima

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Background Mucolipidosis IV (MLIV; OMIM #252650) is an autosomal recessive lysosomal storage disorder, frequently observed in the Ashkenazi Jewish population. MLIV typically results in intellectual disability, corneal opacities, and delayed motor milestones during infancy, with a relatively static course. To date, reports of MLIV in other ethnic groups have been sparse. Patient The present study is a case report of a 9-year-old Japanese boy, diagnosed via whole-exome sequencing, with compound heterozygous mutations of MCOLN1 (OMIM*605248): c.410T>C (p.Leu137Pro) and c.802_803delAG (p.Ser268Trpfs*17). Although his clinical course was mild (due to a lack of corneal clouding), other relevant features were present. These included strabismus, white matter signal abnormalities, and a hypoplastic corpus callosum at 2 years of age. After a molecular diagnosis, a markedly elevated serum gastrin level (which is also common in MLIV) was confirmed. Discussion The present results suggest that MLIV could be added as a differential diagnosis for white matter disorders, regardless of ethnicity. Beyond neurological or ophthalmologic findings, serum gastrin could be a useful diagnostic marker for MLIV.

Original languageEnglish
Pages (from-to)763-767
Number of pages5
JournalBrain and Development
Issue number8
Publication statusPublished - 2016 Sept 1


  • Hypoplastic corpus callosum
  • Magnetic resonance imaging
  • MCOLN1
  • Mucolipidosis IV
  • Serum gastrin
  • White matter disorders


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