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Published on: September 20, 2018

Clinical Symptoms in Late Infantile and Juvenile Onset Neuronal Ceroid Lipofuscinosis Type 7 (CLN7 Disease)

Jennifer Vermilion1, Amy Vierhile1, Marianna Pereira-Frietas1

  • 1Department of Neurology, University of Rochester Medical Center, Rochester, New York.

Pediatric Neurology
|July 3, 2026
PubMed

Insights

Neuronal ceroid lipofuscinosis type 7 (CLN7 disease) presents differently in late-infantile and juvenile forms. Understanding these distinct CLN7 disease progression patterns is crucial for diagnosis and treatment.

Area of Science:

  • Neurology
  • Genetics
  • Rare Diseases

Background:

  • Neuronal ceroid lipofuscinosis type 7 (CLN7 disease) exhibits late-infantile and juvenile onset phenotypes.
  • Limited data exists on CLN7 disease progression, primarily from case reports.
  • Characterizing CLN7 disease phenotypes is essential for clinical management.

Purpose of the Study:

  • To characterize the clinical aspects and natural history of CLN7 disease across its distinct phenotypes.
  • To differentiate the progression patterns of late-infantile versus juvenile onset CLN7 disease.

Main Methods:

  • A longitudinal observational study enrolled participants with CLN7 disease.
  • Data collection included medical/developmental histories and adaptive behavior assessments.
  • Standardized NCL-specific assessments were utilized, including rating scales.

Main Results:

  • Five participants with late-infantile onset and two with juvenile onset CLN7 disease were enrolled.
  • Late-infantile onset: normal early development, language plateau, cognitive issues (onset ~3 years), regression (4-6 years).
  • Juvenile onset: normal early development, vision loss (10-12.5 years), followed by seizures within 4 years.

Conclusions:

  • Late-infantile and juvenile onset CLN7 disease have distinct natural histories and progression.
  • Juvenile onset CLN7 disease exhibits a more protracted disease course.
  • Characterizing CLN7 disease phenotypes aids early diagnosis, clinical management, and therapeutic development.
Abstract

Keywords:
Batten diseaseLysosomal storage disorderNCLNeuronal ceroid lipofuscinosisRare disease

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