U.S. flag

An official website of the United States government

Format

Send to:

Choose Destination

Neuronal ceroid lipofuscinosis 7(CLN7)

MedGen UID:
325457
Concept ID:
C1838571
Disease or Syndrome
Synonyms: CLN7; CLN7 Disease; MFSD8-Related Neuronal Ceroid-Lipofuscinosis
Modes of inheritance:
Autosomal recessive inheritance
MedGen UID:
141025
Concept ID:
C0441748
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele).
 
Gene (location): MFSD8 (4q28.2)
 
Monarch Initiative: MONDO:0012588
OMIM®: 610951
Orphanet: ORPHA228366

Definition

The neuronal ceroid lipofuscinoses (NCL, or CLN) are a clinically and genetically heterogeneous group of neurodegenerative disorders characterized by the intracellular accumulation of autofluorescent lipopigment storage material in different patterns ultrastructurally (summary by Mole et al., 2005). For a general phenotypic description and a discussion of genetic heterogeneity of CLN, see CLN1 (256730). [from OMIM]

Additional description

From MedlinePlus Genetics
CLN7 disease is an inherited disorder that primarily affects the nervous system. The signs and symptoms of this condition typically begin between ages 2 and 7. The initial features are usually vision loss and problems with movement that might seem like clumsiness. Additional signs and symptoms of CLN7 disease include muscle twitches (myoclonus), difficulty coordinating movements (ataxia), recurrent seizures (epilepsy), and speech impairment. Mental functioning and motor skills (such as sitting and walking) decline with age. Individuals with CLN7 disease typically do not survive past their teens.

CLN7 disease is one of a group of disorders known as neuronal ceroid lipofuscinoses (NCLs), which may also be collectively referred to as Batten disease. All these disorders affect the nervous system and typically cause worsening problems with vision, movement, and thinking ability. The different NCLs are distinguished by their genetic cause. Each disease type is given the designation "CLN," meaning ceroid lipofuscinosis, neuronal, and then a number to indicate its subtype.  https://medlineplus.gov/genetics/condition/cln7-disease

Clinical features

From HPO
Cerebellar ataxia
MedGen UID:
849
Concept ID:
C0007758
Disease or Syndrome
Cerebellar ataxia refers to ataxia due to dysfunction of the cerebellum. This causes a variety of elementary neurological deficits including asynergy (lack of coordination between muscles, limbs and joints), dysmetria (lack of ability to judge distances that can lead to under- or overshoot in grasping movements), and dysdiadochokinesia (inability to perform rapid movements requiring antagonizing muscle groups to be switched on and off repeatedly).
Neurodegeneration
MedGen UID:
17999
Concept ID:
C0027746
Cell or Molecular Dysfunction
Progressive loss of neural cells and tissue.
Sleep abnormality
MedGen UID:
52372
Concept ID:
C0037317
Sign or Symptom
An abnormal pattern in the quality, quantity, or characteristics of sleep.
EEG abnormality
MedGen UID:
56235
Concept ID:
C0151611
Finding
Abnormality observed by electroencephalogram (EEG), which is used to record of the brain's spontaneous electrical activity from multiple electrodes placed on the scalp.
Mental deterioration
MedGen UID:
66713
Concept ID:
C0234985
Mental or Behavioral Dysfunction
Loss of previously present mental abilities, generally in adults.
Cerebral atrophy
MedGen UID:
116012
Concept ID:
C0235946
Disease or Syndrome
Atrophy (wasting, decrease in size of cells or tissue) affecting the cerebrum.
Delayed speech and language development
MedGen UID:
105318
Concept ID:
C0454644
Finding
A degree of language development that is significantly below the norm for a child of a specified age.
Global developmental delay
MedGen UID:
107838
Concept ID:
C0557874
Finding
A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.
Cerebellar atrophy
MedGen UID:
196624
Concept ID:
C0740279
Disease or Syndrome
Cerebellar atrophy is defined as a cerebellum with initially normal structures, in a posterior fossa with normal size, which displays enlarged fissures (interfolial spaces) in comparison to the foliae secondary to loss of tissue. Cerebellar atrophy implies irreversible loss of tissue and result from an ongoing progressive disease until a final stage is reached or a single injury, e.g. an intoxication or infectious event.
Generalized myoclonic seizure
MedGen UID:
892704
Concept ID:
C4021759
Disease or Syndrome
A generalized myoclonic seizure is a type of generalized motor seizure characterized by bilateral, sudden, brief (<100 ms) involuntary single or multiple contraction of muscles or muscle groups of variable topography (axial, proximal limb, distal). Myoclonus is less regularly repetitive and less sustained than is clonus.
Optic atrophy
MedGen UID:
18180
Concept ID:
C0029124
Disease or Syndrome
Atrophy of the optic nerve. Optic atrophy results from the death of the retinal ganglion cell axons that comprise the optic nerve and manifesting as a pale optic nerve on fundoscopy.
Retinopathy
MedGen UID:
11209
Concept ID:
C0035309
Disease or Syndrome
Any noninflammatory disease of the retina. This nonspecific term is retained here because of its wide use in the literature, but if possible new annotations should indicate the precise type of retinal abnormality.
Blindness
MedGen UID:
99138
Concept ID:
C0456909
Disease or Syndrome
Blindness is the condition of lacking visual perception defined as a profound reduction in visual perception. On the 6m visual acuity scale, blindness is defined as less than 3/60. On the 20ft visual acuity scale, blindness is defined as less than 20/400. On the decimal visual acuity scale, blindness is defined as less than 0.05. Blindness is typically characterized by a visual field of no greater than 10 degrees in radius around central fixation.
Visual loss
MedGen UID:
784038
Concept ID:
C3665386
Finding
Loss of visual acuity (implying that vision was better at a certain time point in life). Otherwise the term reduced visual acuity should be used (or a subclass of that).
Pigmentary retinopathy
MedGen UID:
1643295
Concept ID:
C4551715
Disease or Syndrome
An abnormality of the retina characterized by pigment deposition. It is typically associated with migration and proliferation of macrophages or retinal pigment epithelial cells into the retina; melanin from these cells causes the pigmentary changes. Pigmentary retinopathy is a common final pathway of many retinal conditions and is often associated with visual loss.

Professional guidelines

PubMed

Rus CM, Weissensteiner T, Pereira C, Susnea I, Danquah BD, Morales Torres G, Rocha ME, Cozma C, Saravanakumar D, Mannepalli S, Kandaswamy KK, Di Bucchianico S, Zimmermann R, Rolfs A, Bauer P, Beetz C
Orphanet J Rare Dis 2022 May 3;17(1):179. doi: 10.1186/s13023-022-02288-8. PMID: 35505348Free PMC Article
Leal-Pardinas F, Truty R, McKnight DA, Johnson B, Morales A, Bristow SL, Yar Pang T, Cohen-Pfeffer J, Izzo E, Sankar R, Koh S, Wirrell EC, Millichap JJ, Aradhya S
Epilepsia 2022 Jul;63(7):e68-e73. Epub 2022 May 10 doi: 10.1111/epi.17269. PMID: 35474188Free PMC Article
Mole SE, Schulz A, Badoe E, Berkovic SF, de Los Reyes EC, Dulz S, Gissen P, Guelbert N, Lourenco CM, Mason HL, Mink JW, Murphy N, Nickel M, Olaya JE, Scarpa M, Scheffer IE, Simonati A, Specchio N, Von Löbbecke I, Wang RY, Williams RE
Orphanet J Rare Dis 2021 Apr 21;16(1):185. doi: 10.1186/s13023-021-01813-5. PMID: 33882967Free PMC Article

Recent clinical studies

Diagnosis

Beckman M, Clevenger L, DeBenedictis MJ, Yuan A, Sharma S
Ophthalmic Genet 2023 Dec;44(6):606-609. Epub 2023 Mar 2 doi: 10.1080/13816810.2023.2183224. PMID: 36861499
Pasquetti D, Marangi G, Orteschi D, Carapelle M, L'Erario FF, Venditti R, Maietta S, Battaglia DI, Contaldo I, Veredice C, Zollino M
Genes (Basel) 2023 Jan 17;14(2) doi: 10.3390/genes14020245. PMID: 36833170Free PMC Article
Sürücü Kara İ, Köse E, Doğulu N, Yüksel MF, Ceylaner S, Kendirli T, Eminoğlu FT
Clin Neurol Neurosurg 2022 Sep;220:107375. Epub 2022 Jul 20 doi: 10.1016/j.clineuro.2022.107375. PMID: 35917699

Clinical prediction guides

Pasquetti D, Marangi G, Orteschi D, Carapelle M, L'Erario FF, Venditti R, Maietta S, Battaglia DI, Contaldo I, Veredice C, Zollino M
Genes (Basel) 2023 Jan 17;14(2) doi: 10.3390/genes14020245. PMID: 36833170Free PMC Article

Supplemental Content

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...