raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2407

Laryngo-onycho-cutaneous syndrome

Synonyms: LOC syndrome · LOGIC syndrome · Laryngeal and ocular granulation tissue in children from the Indian subcontinent syndrome · Shabbir syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

LOC syndrome is a subtype of junctional epidermolysis bullosa (JEB) characterized by an altered cry in the neonatal period and by aberrant production of granulation tissue in particular affecting the upper airway tract, conjunctiva and periungual/subungual sites.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enLaryngo-onycho-cutaneous syndromeLOC syndrome · LOGIC syndrome · Laryngeal and ocular granulation tissue in children from the Indian subcontinent syndrome · Shabbir syndrome
frSyndrome laryngo-onycho-cutanéGranulations laryngées et oculaires chez les enfants indiens · Syndrome LOC · Syndrome LOGIC · Syndrome de Shabbir
deLaryngo-onycho-kutanes SyndromLOC-Syndrom · LOGIC-Syndrom · Shabbir-Syndrom · Syndrom des laryngealen und okulären Granulationsgewebes bei Kindern des Indischen Subkontinents
esSíndrome laringo-ónico-cutáneoSíndrome LOC · Síndrome LOGIC · Síndrome de Shabbir · Síndrome de tejido de granulación laríngeo y ocular en niños del subcontinente indio
itSindrome LOCSindrome LOGIC · Sindrome del tessuto di granulazione oculare e laringeo nei bambini del subcontinente indiano · Sindrome di Shabbir
nlLaryngo-onycho-cutaan syndroomLOC-syndroom · LOGIC-syndroom · Syndroom van Shabbir · Syndroom van laryngeaal en oculair granulatieweefsel bij kinderen van het Indiase subcontinent
ptSíndrome laringo-onico-cutâneoSíndrome LOC · Síndrome LOGIC · Síndrome de tecido de granulação oculo-laringeo em crianças do subcontinente Indiano
plZespół krtaniowo-paznokciowo-skórnyZespół LOGIC · Zespół Shabbira · Zespół LOC
csLOC syndromLOGIC syndrom · Laryngoonychokutánní syndrom · Syndrom laryngeální a okulární granulační tkáně u dětí z Indického subkotinentu · Shabbirův syndrom
ukЛарингооніхокутанний синдромГрануляційна тканина гортані та очей у дітей із синдромом Індійського субконтиненту · LOC синдром · LOGIC синдром · Синдром Шаббіра
zhLOC综合征印度次大陆儿童喉和眼部肉芽组织综合征
trLOC sendromuLOGIC sendromu · Shabbir sendromu · Laringo-oniko-kutanöz sendrom · Hint Yarımadası çocuklarında laringeal ve oküler granülasyon dokusu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM245660Evalidated
ICD-10Q81.8NTBTattributedvalidated
ICD-11EC31NTBTindexvalidated
MONDO0009513Evalidated
MeSHC537032Evalidated
UMLSC1328355Evalidated
MedDRA10062987Evalidated

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 (8):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
LAMA3Disease-causing germline mutation(s) inAssessedHGNC:6483ENSG0000005374760080518q11.2laminin subunit alpha 312915477[PMID]_23869449[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families50 casesWorldwideCase(s)Validated[EXPERT]
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

22 annotations · validated 2025-02-04
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0200042Skin ulcer
HP:0001607Subglottic stenosis
Frequent (79-30%)
HP:0008066Abnormal blistering of the skin
HP:0100803Abnormality of the periungual region
HP:0000670Carious teeth
HP:0200020Corneal erosion
HP:0012804Corneal ulceration
HP:0000684Delayed eruption of teeth
HP:0006297Enamel hypoplasia
HP:6000956Exuberant granulation tissue
HP:0001030Fragile skin
HP:0001609Hoarse voice
HP:0005348Inspiratory stridor
HP:0000691Microdontia
HP:0008404Nail dystrophy
HP:0200097Oral mucosal blisters
HP:0200041Skin erosion
HP:0430007Symblepharon
Occasional (29-5%)
HP:0008777Abnormal vocal cord morphology
HP:0000421Epistaxis
HP:0004840Hypochromic microcytic anemia
HP:0000505Visual impairment

Run the differential on the 2 obligate / very frequent terms

Annotation source: 38328664[PMID]_34514630[PMID]

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Sources for this card