Severe Achondroplasia-developmental Delay-acanthosis Nigricans Syndrome

Description

Severe achondroplasia-developmental delay-acanthosis nigricans syndrome is characterised by the association of severe achondroplasia with developmental delay and acanthosis nigricans. It has been described in four unrelated individuals. Structural central nervous system anomalies, seizures and hearing loss were also reported, together with bowing of the clavicle, femur, tibia and fibula in some cases. The syndrome is caused by a Lys650Met substitution in the kinase domain of fibroblast growth factor receptor 3 (encoded by the FGFR3 gene; 4p16.3).

Clinical Features

Top most frequent phenotypes and symptoms related to Severe Achondroplasia-developmental Delay-acanthosis Nigricans Syndrome

  • Intellectual disability
  • Seizures
  • Global developmental delay
  • Generalized hypotonia
  • Hearing impairment
  • Microcephaly
  • Depressed nasal bridge
  • Frontal bossing
  • Hypoplasia of the corpus callosum
  • Hydrocephalus

And another 37 symptoms. If you need more information about this disease we can help you.

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Incidence and onset information

— Currently we don't have prevalence information about this disease (Not enough data available about incidence and published cases.)
No data available about the known clinical features onset.

Alternative names

Severe Achondroplasia-developmental Delay-acanthosis Nigricans Syndrome Is also known as saddan, saddan dysplasia.

Researches and researchers

Currently, we don't have any information about doctors, researches or researchers related to this disease. Please contact us if you would like to appear here.


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Severe Achondroplasia-developmental Delay-acanthosis Nigricans Syndrome Recommended genes panels

Panel Name, Specifity and genes Tested/covered
Achondroplasia Mutation Panel.

By Baylor Miraca Genetics Laboratories (United States).

FGFR3
Specificity
100 %
Genes
100 %
PreSeek Non-invasive Prenatal Gene Sequencing Screen.

By Baylor Miraca Genetics Laboratories (United States).

RIT1, BRAF, SMC1A, SOS1, SOS2, CDKL5, SYNGAP1, TSC1, TSC2, HDAC8, NSD1, CBL, SHOC2, CHD7, COL1A2, SMC3, NIPBL, FGFR2, FGFR3, HRAS , (...)

View the complete list with 9 more genes
Specificity
4 %
Genes
100 %
Epilepsy Advanced Sequencing and CNV Evaluation - Developmental Brain Malformations.

By Athena Diagnostics Inc (United States).

SHH, STIL, SIX3, TUBA8, SLC25A19, DEAF1, ARFGEF2, RAB3GAP1, CENPJ, NDE1, FKRP, ARX, ASPM, POMGNT1, POMT2, TUBA1A, COL4A1, CPT2, WDR62, DCX , (...)

View the complete list with 20 more genes
Specificity
3 %
Genes
100 %
Epilepsy Advanced Sequencing and CNV Evaluation.

By Athena Diagnostics Inc (United States).

SCN1A, SCN1B, SCN2A, SCN3A, SCN5A, SCN8A, SCN9A, SHH, ST3GAL3, ST3GAL5, STIL, SIX3, SLC2A1, SLC35A2, SLC6A1, SLC6A8, SLC9A6, SMC1A, KDM5C, SMS , (...)

View the complete list with 214 more genes
Specificity
1 %
Genes
100 %
Hearing Loss Advanced Sequencing and CNV Evaluation.

By Athena Diagnostics Inc (United States).

BCS1L, ROR1, SALL1, SEMA3E, SIX1, SIX5, SLC12A1, SLC19A2, SLC22A4, SNAI2, SMPX, SOX10, TBX1, TCOF1, TECTA, TFAP2A, TIMM8A, TJP2, TMPRSS3, USH1C , (...)

View the complete list with 149 more genes
Specificity
1 %
Genes
100 %
Non-immune Hydrops Panel.

By Greenwood Genetic Center Diagnostic Laboratories Greenwood Genetic Center (United States).

RIT1, RPL11, RPL35A, RPL5, RPS10, RPS17, RPS19, RPS24, RPS26, SEC23B, SLC17A5, BRAF, SMPD1, SOS1, SOS2, SOX18, UROS, CBL, SHOC2, ALG9 , (...)

View the complete list with 66 more genes
Specificity
2 %
Genes
100 %
NGS Skeletal Dysplasia Panel.

By Greenwood Genetic Center Diagnostic Laboratories Greenwood Genetic Center (United States).

SLC26A2, SOX9, TRPV4, COL1A2, COMP, FGFR3, FLNA, HSPG2
Specificity
13 %
Genes
100 %
FGFR3-related disorders.

By Greenwood Genetic Center Diagnostic Laboratories Greenwood Genetic Center (United States).

FGFR3
Specificity
100 %
Genes
100 %

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Sources and references

You can check the following sources for additional information.

ORPHANET OMIM Genetic Syndrome Finder

If you liked this article maybe you will also find interesting the following in-depth articles about other rare diseases, like TRICHOTHIODYSTROPHY 3, PHOTOSENSITIVE; TTD3 LUSCAN-LUMISH SYNDROME; LLS LUBS X-LINKED MENTAL RETARDATION SYNDROME; MRXSL ALTERNATING HEMIPLEGIA OF CHILDHOOD 1; AHC1 OPSISMODYSPLASIA; OPSMD EPILEPTIC ENCEPHALOPATHY, EARLY INFANTILE, 6; EIEE6

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