raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:137867

Madras motor neuron disease

Synonyms: MMND

Type
Disease
Group
Disorder
Inheritance
Not applicable, X-linked recessive
Age of onset
Adolescent, Adult, Childhood
Status
active

Madras motor neuron disease (MMND) is characterized by weakness and atrophy of limbs, multiple lower cranial nerve palsies and sensorineural hearing loss.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMadras motor neuron diseaseMMND
frMaladie du motoneurone type Madras
deMotoneuron-Krankheit Madras= en
esEnfermedad de las motoneuronas de Madras
itMalattia dei motoneuroni di Madras= en
nlMotorneuronziekte van Madras= en
ptDoença do neurónio motor Madras
plChoroba neuronu ruchowego z Madrasu= en
csMadráská nemoc motorických neuronů= en
ukМадраська хвороба рухових нейронів= en
zhMadras运动神经元病= en
trMadras motor nöron hastalığı= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10G12.2NTBTattributedvalidated
ICD-118B60.7Especificvalidated
MONDO0015307Evalidated
UMLSC0393551Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families200 casesWorldwideCase(s)ValidatedORPHANET
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

17 annotations · validated 2016-10-11
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001283Bulbar palsy
HP:0000407Sensorineural hearing impairment
Frequent (79-30%)
HP:0003487Babinski sign
HP:0003693Distal amyotrophy
HP:0002460Distal muscle weakness
HP:0006801Hyperactive deep tendon reflexes
HP:0007289Limb fasciculations
HP:0001621Weak voice
Occasional (29-5%)
HP:0001317Abnormal cerebellum morphology
HP:0002015Dysphagia
HP:0000648Optic atrophy
HP:0001315Reduced tendon reflexes
HP:0100753Schizophrenia
HP:0000360Tinnitus
HP:0000505Visual impairment
Very rare (<4-1%)
HP:0010628Facial palsy
HP:0007663Reduced visual acuity

Run the differential on the 2 obligate / very frequent terms

Annotation source: 18261745[PMID]

7

Sources for this card