Our patient presented with congenital deafness, hypotonia, dysphygia and ataxia in early childhood. [ncbi.nlm.nih.gov]

Microdontia was the most constant finding that was present in all affected individuals. Michel aplasia was present in most cases although other severe inner ear anomalies were detected in some individuals, especially with the p.R95W mutation. [miami.pure.elsevier.com]

Possibility of X-linked form was unlikely as most affected patients have early presentation incontrast to this patient who presented with deformities at 13 years of age. [indianpediatrics.net]

Each diagnosis includes clinical presentation(s) of affected patients, the best sequences for imaging analysis, expected imaging sequences (in both common and uncommon presentations), and imaging examples of key features. [books.google.com]

• Developmental Delay

  delay - acanthosis nigricans Thanatophoric dysplasia type 1 Thanatophoric dysplasia type 2 Synonym(s): - LAMM syndrome - Microdontia - type I microtia - deafness Classification (Orphanet): - Rare developmental defect during embryogenesis - Rare genetic [csbg.cnb.csic.es]

  Microtia with anteverted ears Some individuals may also show gross motor developmental delay during infancy (presumably due to the absence of vestibular system) accompanied by additional features that include: Hypoplasia/dysplasia of middle ear anatomic [ncbi.nlm.nih.gov]

• Asymptomatic

  Heterozygotes (carriers) are asymptomatic and are not at risk of developing the disorder. [ncbi.nlm.nih.gov]

• Ear Deformity

  Michel dysplasia: common cavity inner ear deformity. Pediatr Radiol 1989 ; 19 : 343 –45 ↵ Romo VR, Casselman JW, Robson CD. Temporal bone: congenital anomalies. In: Som PM, Curtin HD, eds. Head and Neck Imaging. 4th ed. St. [ajnr.org]

• Seizure

  This report pinpoints the importance of CSF folate investigations in children with unexplained progressive neurological presentations, even if a malformative syndrome is obviously present, and suggests a trial with PLP in folinic acid-unresponsive seizures [ncbi.nlm.nih.gov]

  Epilepsy developed in six children, and two others (Patients 20 and 25) had occasional seizures; the former six had intractable epilepsy with absences, myoclonic astatic attacks, and grand mal seizures requiring anticonvulsant therapy. [nejm.org]

  Dill P, Schneider J, Weber P, Trachsel D, Tekin M, et al. (2011) Pyridoxal phosphate-responsive seizures in a patient with cerebral folate deficiency (CFD) and congenital deafness with labyrinthine aplasia, microtia and microdontia (LAMM). [omicsonline.org]

• Meningism

  Anomaly of the facial canal in a Mondini malformation with recurrent meningitis. Radiology 1982 ; 144 : 335 –41 ↵ Lefebvre PP, Leprince P, Weber T, et al. [ajnr.org]

The aforementioned t-test was also used to compare pre-treatment and post-treatment levels of 5MTHF in the cerebrospinal fluid in the group with cerebral folate deficiency and our previously established reference data obtained from the 99 normal controls [nejm.org]

Upon oral treatment with folinic acid the boy regained consciousness while the epilepsy could be successfully managed only with additional pyridoxal 5'-phosphate (PLP). [ncbi.nlm.nih.gov]

The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment. [orpha.net]

Treatment [ edit ] enrollment in appropriate early intervention programs for the deaf and hard of hearing. consideration of vibrotactile hearing devices or brain stem implants for individuals with Congenital labyrinthine aplasia Evaluation for cochlear [en.wikipedia.org]

Etiology Linkage analysis followed by sequencing of candidate genes led to identification of three different homozygous mutations in the FGF3 gene (11q13). Genetic counseling Transmission is autosomal recessive. [orpha.net]

The central role of FGF23 in its etiology and its structural similarity to FGF3 lead us to hypothesize that the mutation found in FGF3 could also be involved in the pathogenesis of hypophosphatemic rickets in this patient. [indianpediatrics.net]

Prevention of Secondary Complications Regardless of its etiology, uncorrected hearing loss has consistent sequelae: Auditory deprivation through age two years is associated with poor reading performance, poor communication skills, and poor speech production [ncbi.nlm.nih.gov]

Summary Epidemiology It has been described in 6 families to date. [orpha.net]

Chapters on epidemiology, embryology, non-syndromic hearing loss, and syndromic forms of hearing loss have all been updated with particular attention to the vast amount of new information on molecular mechanisms, and chapters on clinical and molecular [books.google.com]

Synonym(s): - LAMM syndrome - Microdontia - type I microtia - deafness Classification (Orphanet): - Rare developmental defect during embryogenesis - Rare genetic disease - Rare otorhinolaryngologic disease Classification (ICD10): (no data available) Epidemiological [csbg.cnb.csic.es]

Epidemiology [ edit ] Michel aplasia is a rare disease. It was first described by P. Michel in the year 1863. [en.wikipedia.org]

Genetic epidemiology of hearing impairment. Ann N Y Acad Sci. 1991;630:16–31. Nance WE, Setleff R, McLeod A, Sweeney A, Cooper C, McConnell F. X-linked mixed deafness with congenital fixation of the stapedial footplate and perilymphatic gusher. [revista.acorl.org.co]

Additional information is included concerning the pathophysiology and pathology of the disorders being discussed as well as basic information concerning the causative genes (when appropriate). [books.google.com]

Histopathology of inner ear malformations: do we have enough evidence to explain pathophysiology? Cochlear Implants Int. 2016;17:3–20. Van Camp G, Willems PJ, Smith RJ. Nonsyndromic hearing impairment: unparalleled heterogeneity. [revista.acorl.org.co]

Prevention (of secondary complications) [ edit ] Presence of inner ear abnormalities lead to Delayed gross development of child because of balance impairment and profound deafness which increases the risk of trauma and accidents. [en.wikipedia.org]

Blocking autoantibodies, if present, prevent the binding of [ 3 H]folic acid to folate receptors. [nejm.org]

Injury prevention for children with disabilities. [ncbi.nlm.nih.gov]

Unfortunately, we could not have access to cells from the patient and could not perform further analysis at the RNA or protein level, then preventing to exclude this possibility. [omicsonline.org]