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Intellectual disability, autosomal recessive 65(MRT65)

MedGen UID:
1648401
Concept ID:
C4748219
Mental or Behavioral Dysfunction
Synonyms: INTELLECTUAL DEVELOPMENTAL DISORDER, AUTOSOMAL RECESSIVE 65; MENTAL RETARDATION, AUTOSOMAL RECESSIVE 65
 
Gene (location): KDM5B (1q32.1)
 
Monarch Initiative: MONDO:0020850
OMIM®: 618109

Clinical features

From HPO
Cryptorchidism
MedGen UID:
8192
Concept ID:
C0010417
Congenital Abnormality
Cryptorchidism, or failure of testicular descent, is a common human congenital abnormality with a multifactorial etiology that likely reflects the involvement of endocrine, environmental, and hereditary factors. Cryptorchidism can result in infertility and increases risk for testicular tumors. Testicular descent from abdomen to scrotum occurs in 2 distinct phases: the transabdominal phase and the inguinoscrotal phase (summary by Gorlov et al., 2002).
Hypospadias
MedGen UID:
163083
Concept ID:
C0848558
Congenital Abnormality
Abnormal position of urethral meatus on the ventral penile shaft (underside) characterized by displacement of the urethral meatus from the tip of the glans penis to the ventral surface of the penis, scrotum, or perineum.
Atrial septal defect
MedGen UID:
6753
Concept ID:
C0018817
Congenital Abnormality
Atrial septal defect (ASD) is a congenital abnormality of the interatrial septum that enables blood flow between the left and right atria via the interatrial septum.
Atrial septal defect, ostium secundum type
MedGen UID:
91034
Concept ID:
C0344724
Congenital Abnormality
A kind of atrial septum defect arising from an enlarged foramen ovale, inadequate growth of the septum secundum, or excessive absorption of the septum primum.
Feeding difficulties
MedGen UID:
65429
Concept ID:
C0232466
Finding
Impaired ability to eat related to problems gathering food and getting ready to suck, chew, or swallow it.
Abnormal pinna morphology
MedGen UID:
167800
Concept ID:
C0857379
Congenital Abnormality
An abnormality of the pinna, which is also referred to as the auricle or external ear.
Aggressive behavior
MedGen UID:
1375
Concept ID:
C0001807
Individual Behavior
Behavior or an act aimed at harming a person, animal, or physical property (e.g., acts of physical violence; shouting, swearing, and using harsh language; slashing someone's tires).
Intellectual disability, moderate
MedGen UID:
7680
Concept ID:
C0026351
Mental or Behavioral Dysfunction
Moderate mental retardation is defined as an intelligence quotient (IQ) in the range of 35-49.
Unsteady gait
MedGen UID:
68544
Concept ID:
C0231686
Finding
A shaky or wobbly manner of walking.
Delayed ability to walk
MedGen UID:
66034
Concept ID:
C0241726
Finding
A failure to achieve the ability to walk at an appropriate developmental stage. Most children learn to walk in a series of stages, and learn to walk short distances independently between 12 and 15 months.
Hypoplasia of the corpus callosum
MedGen UID:
138005
Concept ID:
C0344482
Congenital Abnormality
Underdevelopment of the corpus callosum.
Partial agenesis of the corpus callosum
MedGen UID:
98127
Concept ID:
C0431368
Congenital Abnormality
A partial failure of the development of the corpus callosum.
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.
Gait ataxia
MedGen UID:
155642
Concept ID:
C0751837
Sign or Symptom
A type of ataxia characterized by the impairment of the ability to coordinate the movements required for normal walking. Gait ataxia is characteirzed by a wide-based staggering gait with a tendency to fall.
Severe global developmental delay
MedGen UID:
332436
Concept ID:
C1837397
Finding
A severe delay in the achievement of motor or mental milestones in the domains of development of a child.
Moderate global developmental delay
MedGen UID:
500807
Concept ID:
C2237142
Finding
A moderate delay in the achievement of motor or mental milestones in the domains of development of a child.
Inguinal hernia
MedGen UID:
6817
Concept ID:
C0019294
Finding
Protrusion of the contents of the abdominal cavity through the inguinal canal.
Dolichocephaly
MedGen UID:
65142
Concept ID:
C0221358
Congenital Abnormality
An abnormality of skull shape characterized by a increased anterior-posterior diameter, i.e., an increased antero-posterior dimension of the skull. Cephalic index less than 76%. Alternatively, an apparently increased antero-posterior length of the head compared to width. Often due to premature closure of the sagittal suture.
Prominent metopic ridge
MedGen UID:
387953
Concept ID:
C1857949
Finding
Vertical bony ridge positioned in the midline of the forehead.
Contracture of the proximal interphalangeal joint of the 5th finger
MedGen UID:
767526
Concept ID:
C3554612
Finding
Proximal interphalangeal (PIP) flexion deformity of the little finger. That is, the PIP joint of a little finger is bent (flexed) and cannot be straightened actively or passively. It is thus a chronic loss of joint motion due to structural changes in muscle, tendons, ligaments, or skin that prevents normal movement.
Contracture of the proximal interphalangeal joint of the 4th finger
MedGen UID:
867145
Concept ID:
C4021503
Anatomical Abnormality
Chronic loss of joint motion of the proximal interphalangeal joint of the 4th finger due to structural changes in non-bony tissue. That is, the PIP joint of a fourth finger is bent (flexed) and cannot be straightened actively or passively. It is thus a chronic loss of joint motion due to structural changes in muscle, tendons, ligaments, or skin that prevents normal movement.
Bulbous nose
MedGen UID:
66013
Concept ID:
C0240543
Finding
Increased volume and globular shape of the anteroinferior aspect of the nose.
Downslanted palpebral fissures
MedGen UID:
98391
Concept ID:
C0423110
Finding
The palpebral fissure inclination is more than two standard deviations below the mean.
Thin vermilion border
MedGen UID:
108294
Concept ID:
C0578038
Finding
Height of the vermilion of the medial part of the lip more than 2 SD below the mean, or apparently reduced height of the vermilion of the lip in the frontal view. The vermilion is the red part of the lips (and confusingly, the vermilion itself is also often referred to as being equivalent the lips).
Smooth philtrum
MedGen UID:
222980
Concept ID:
C1142533
Finding
Flat skin surface, with no ridge formation in the central region of the upper lip between the nasal base and upper vermilion border.
Square face
MedGen UID:
371253
Concept ID:
C1832127
Finding
Facial contours, as viewed from the front, show a broad upper face/cranium and lower face/mandible, creating a square appearance.
Prominent nasal bridge
MedGen UID:
343051
Concept ID:
C1854113
Finding
Anterior positioning of the nasal root in comparison to the usual positioning for age.
Low hanging columella
MedGen UID:
344656
Concept ID:
C1856119
Finding
Columella extending inferior to the level of the nasal base, when viewed from the side.
Supernumerary nipple
MedGen UID:
120564
Concept ID:
C0266011
Congenital Abnormality
Presence of more than two nipples.
Astigmatism
MedGen UID:
2473
Concept ID:
C0004106
Disease or Syndrome
Astigmatism (from the Greek 'a' meaning absence and 'stigma' meaning point) is a condition in which the parallel rays of light entering the eye through the refractive media are not focused on a single point. Both corneal and noncorneal factors contribute to refractive astigmatism. Corneal astigmatism is mainly the result of an aspheric anterior surface of the cornea, which can be measured readily by means of a keratometer; in a small fraction of cases (approximately 1 in 10) the effect is neutralized by the back surface. The curvature of the back surface of the cornea is not considered in most studies, because it is more difficult to measure; moreover, in the case of severe corneal astigmatism, there is evidence that both surfaces have the same configuration. Noncorneal factors are errors in the curvature of the 2 surfaces of the crystalline lens, irregularity in the refractive index of the lens, and an eccentric lens position. Since the cornea is the dominant component of the eye's refracting system, a highly astigmatic cornea is likely to result in a similarly astigmatic ocular refraction (summary by Clementi et al., 1998).
Ptosis
MedGen UID:
2287
Concept ID:
C0005745
Disease or Syndrome
The upper eyelid margin is positioned 3 mm or more lower than usual and covers the superior portion of the iris (objective); or, the upper lid margin obscures at least part of the pupil (subjective).
Myopia
MedGen UID:
44558
Concept ID:
C0027092
Disease or Syndrome
Nearsightedness, also known as myopia, is an eye condition that causes blurry distance vision. People who are nearsighted have more trouble seeing things that are far away (such as when driving) than things that are close up (such as when reading or using a computer). If it is not treated with corrective lenses or surgery, nearsightedness can lead to squinting, eyestrain, headaches, and significant visual impairment.\n\nNearsightedness usually begins in childhood or adolescence. It tends to worsen with age until adulthood, when it may stop getting worse (stabilize). In some people, nearsightedness improves in later adulthood.\n\nFor normal vision, light passes through the clear cornea at the front of the eye and is focused by the lens onto the surface of the retina, which is the lining of the back of the eye that contains light-sensing cells. People who are nearsighted typically have eyeballs that are too long from front to back. As a result, light entering the eye is focused too far forward, in front of the retina instead of on its surface. It is this change that causes distant objects to appear blurry. The longer the eyeball is, the farther forward light rays will be focused and the more severely nearsighted a person will be.\n\nNearsightedness is measured by how powerful a lens must be to correct it. The standard unit of lens power is called a diopter. Negative (minus) powered lenses are used to correct nearsightedness. The more severe a person's nearsightedness, the larger the number of diopters required for correction. In an individual with nearsightedness, one eye may be more nearsighted than the other.\n\nEye doctors often refer to nearsightedness less than -5 or -6 diopters as "common myopia." Nearsightedness of -6 diopters or more is commonly called "high myopia." This distinction is important because high myopia increases a person's risk of developing other eye problems that can lead to permanent vision loss or blindness. These problems include tearing and detachment of the retina, clouding of the lens (cataract), and an eye disease called glaucoma that is usually related to increased pressure within the eye. The risk of these other eye problems increases with the severity of the nearsightedness. The term "pathological myopia" is used to describe cases in which high myopia leads to tissue damage within the eye.
Strabismus
MedGen UID:
21337
Concept ID:
C0038379
Disease or Syndrome
A misalignment of the eyes so that the visual axes deviate from bifoveal fixation. The classification of strabismus may be based on a number of features including the relative position of the eyes, whether the deviation is latent or manifest, intermittent or constant, concomitant or otherwise and according to the age of onset and the relevance of any associated refractive error.

Professional guidelines

PubMed

Borroto MC, Michaud C, Hudon C, Agrawal PB, Agre K, Applegate CD, Beggs AH, Bjornsson HT, Callewaert B, Chen MJ, Curry C, Devinsky O, Dudding-Byth T, Fagan K, Finnila CR, Gavrilova R, Genetti CA, Hiatt SM, Hildebrandt F, Wojcik MH, Kleefstra T, Kolvenbach CM, Korf BR, Kruszka P, Li H, Litwin J, Marcadier J, Platzer K, Blackburn PR, Reijnders MRF, Reutter H, Schanze I, Shieh JT, Stevens CA, Valivullah Z, van den Boogaard MJ, Klee EW, Campeau PM
Genes (Basel) 2024 Aug 6;15(8) doi: 10.3390/genes15081033. PMID: 39202393Free PMC Article
Toktaş İ, Sarıbaş S, Canpolat S, Erdem Ö, Özbek MN
Turk J Pediatr 2022;64(6):985-992. doi: 10.24953/turkjped.2022.467. PMID: 36583880
Thomas LA, Lewis S, Massie J, Kirk EP, Archibald AD, Barlow-Stewart K, Boardman FK, Halliday J, McClaren B, Delatycki MB
Eur J Med Genet 2020 Dec;63(12):104075. Epub 2020 Sep 30 doi: 10.1016/j.ejmg.2020.104075. PMID: 33007447

Recent clinical studies

Etiology

Toktaş İ, Sarıbaş S, Canpolat S, Erdem Ö, Özbek MN
Turk J Pediatr 2022;64(6):985-992. doi: 10.24953/turkjped.2022.467. PMID: 36583880
Taşkıran EZ, Karaosmanoğlu B, Koşukcu C, Ürel-Demir G, Akgün-Doğan Ö, Şimşek-Kiper PÖ, Alikaşifoğlu M, Boduroğlu K, Utine GE
J Intellect Disabil Res 2021 Jun;65(6):577-588. Epub 2021 Mar 19 doi: 10.1111/jir.12835. PMID: 33739554
Zalewski CK, Sydlowski SA, King KA, Bianconi S, Dang Do A, Porter FD, Brewer CC
Am J Med Genet A 2021 Apr;185(4):1131-1141. Epub 2021 Feb 2 doi: 10.1002/ajmg.a.62087. PMID: 33529473Free PMC Article
Boukhris A, Schule R, Loureiro JL, Lourenço CM, Mundwiller E, Gonzalez MA, Charles P, Gauthier J, Rekik I, Acosta Lebrigio RF, Gaussen M, Speziani F, Ferbert A, Feki I, Caballero-Oteyza A, Dionne-Laporte A, Amri M, Noreau A, Forlani S, Cruz VT, Mochel F, Coutinho P, Dion P, Mhiri C, Schols L, Pouget J, Darios F, Rouleau GA, Marques W Jr, Brice A, Durr A, Zuchner S, Stevanin G
Am J Hum Genet 2013 Jul 11;93(1):118-23. Epub 2013 Jun 6 doi: 10.1016/j.ajhg.2013.05.006. PMID: 23746551Free PMC Article
Voit T
Brain Dev 1998 Mar;20(2):65-74. doi: 10.1016/s0387-7604(97)00094-6. PMID: 9545174

Diagnosis

Shchelochkov OA, Farmer CA, Chlebowski C, Adedipe D, Ferry S, Manoli I, Pass A, McCoy S, Van Ryzin C, Sloan J, Thurm A, Venditti CP
Mol Psychiatry 2024 Apr;29(4):974-981. Epub 2024 Jan 11 doi: 10.1038/s41380-023-02385-5. PMID: 38200289Free PMC Article
Saffari A, Kellner M, Jordan C, Rosengarten H, Mo A, Zhang B, Strelko O, Neuser S, Davis MY, Yoshikura N, Futamura N, Takeuchi T, Nabatame S, Ishiura H, Tsuji S, Aldeen HS, Cali E, Rocca C, Houlden H, Efthymiou S, Assmann B, Yoon G, Trombetta BA, Kivisäkk P, Eichler F, Nan H, Takiyama Y, Tessa A, Santorelli FM, Sahin M, Blackstone C, Yang E, Schüle R, Ebrahimi-Fakhari D
Brain 2023 May 2;146(5):2003-2015. doi: 10.1093/brain/awac391. PMID: 36315648Free PMC Article
Neri S, Maia N, Fortuna AM, Damasio J, Coale E, Willis M, Jorge P, Højte AF, Fenger CD, Møller RS, Bayat A
Eur J Med Genet 2022 Nov;65(11):104624. Epub 2022 Sep 18 doi: 10.1016/j.ejmg.2022.104624. PMID: 36130690
Winter-Paquette LM, Al Suwaidi HH, Sajjad Y, Bricker L
Eur J Med Genet 2022 May;65(5):104501. Epub 2022 Apr 1 doi: 10.1016/j.ejmg.2022.104501. PMID: 35378319
Zalewski CK, Sydlowski SA, King KA, Bianconi S, Dang Do A, Porter FD, Brewer CC
Am J Med Genet A 2021 Apr;185(4):1131-1141. Epub 2021 Feb 2 doi: 10.1002/ajmg.a.62087. PMID: 33529473Free PMC Article

Therapy

Saffari A, Kellner M, Jordan C, Rosengarten H, Mo A, Zhang B, Strelko O, Neuser S, Davis MY, Yoshikura N, Futamura N, Takeuchi T, Nabatame S, Ishiura H, Tsuji S, Aldeen HS, Cali E, Rocca C, Houlden H, Efthymiou S, Assmann B, Yoon G, Trombetta BA, Kivisäkk P, Eichler F, Nan H, Takiyama Y, Tessa A, Santorelli FM, Sahin M, Blackstone C, Yang E, Schüle R, Ebrahimi-Fakhari D
Brain 2023 May 2;146(5):2003-2015. doi: 10.1093/brain/awac391. PMID: 36315648Free PMC Article
Yuan B, Pehlivan D, Karaca E, Patel N, Charng WL, Gambin T, Gonzaga-Jauregui C, Sutton VR, Yesil G, Bozdogan ST, Tos T, Koparir A, Koparir E, Beck CR, Gu S, Aslan H, Yuregir OO, Al Rubeaan K, Alnaqeb D, Alshammari MJ, Bayram Y, Atik MM, Aydin H, Geckinli BB, Seven M, Ulucan H, Fenercioglu E, Ozen M, Jhangiani S, Muzny DM, Boerwinkle E, Tuysuz B, Alkuraya FS, Gibbs RA, Lupski JR
J Clin Invest 2015 Feb;125(2):636-51. Epub 2015 Jan 9 doi: 10.1172/JCI77435. PMID: 25574841Free PMC Article

Prognosis

Cingöz S, Soydemir D, Öner TÖ, Karaca E, Özden B, Kurul SH, Bayram E; University of Washington Center for Mendelian Genomics, Coe BP, Nickerson DA, Eichler EE
Eur J Med Genet 2022 Jun;65(6):104497. Epub 2022 Apr 14 doi: 10.1016/j.ejmg.2022.104497. PMID: 35430327Free PMC Article
Wen J, Chai H, Grommisch B, DiAdamo A, Dykas D, Ma D, Popa A, Zhao C, Spencer-Manzon M, Jiang YH, McGrath J, Li P, Bale A, Zhang H
Am J Med Genet A 2022 Jun;188(6):1728-1738. Epub 2022 Feb 23 doi: 10.1002/ajmg.a.62693. PMID: 35199448
Hiraide T, Nakashima M, Ikeda T, Tanaka D, Osaka H, Saitsu H
J Hum Genet 2020 Oct;65(10):921-925. Epub 2020 Jun 1 doi: 10.1038/s10038-020-0786-y. PMID: 32483275
Yuan B, Pehlivan D, Karaca E, Patel N, Charng WL, Gambin T, Gonzaga-Jauregui C, Sutton VR, Yesil G, Bozdogan ST, Tos T, Koparir A, Koparir E, Beck CR, Gu S, Aslan H, Yuregir OO, Al Rubeaan K, Alnaqeb D, Alshammari MJ, Bayram Y, Atik MM, Aydin H, Geckinli BB, Seven M, Ulucan H, Fenercioglu E, Ozen M, Jhangiani S, Muzny DM, Boerwinkle E, Tuysuz B, Alkuraya FS, Gibbs RA, Lupski JR
J Clin Invest 2015 Feb;125(2):636-51. Epub 2015 Jan 9 doi: 10.1172/JCI77435. PMID: 25574841Free PMC Article
Tran C, Hewson S, Steinberg SJ, Mercimek-Mahmutoglu S
Pediatr Neurol 2014 Aug;51(2):262-5. Epub 2014 Mar 28 doi: 10.1016/j.pediatrneurol.2014.03.020. PMID: 25079577

Clinical prediction guides

Shchelochkov OA, Farmer CA, Chlebowski C, Adedipe D, Ferry S, Manoli I, Pass A, McCoy S, Van Ryzin C, Sloan J, Thurm A, Venditti CP
Mol Psychiatry 2024 Apr;29(4):974-981. Epub 2024 Jan 11 doi: 10.1038/s41380-023-02385-5. PMID: 38200289Free PMC Article
Saffari A, Kellner M, Jordan C, Rosengarten H, Mo A, Zhang B, Strelko O, Neuser S, Davis MY, Yoshikura N, Futamura N, Takeuchi T, Nabatame S, Ishiura H, Tsuji S, Aldeen HS, Cali E, Rocca C, Houlden H, Efthymiou S, Assmann B, Yoon G, Trombetta BA, Kivisäkk P, Eichler F, Nan H, Takiyama Y, Tessa A, Santorelli FM, Sahin M, Blackstone C, Yang E, Schüle R, Ebrahimi-Fakhari D
Brain 2023 May 2;146(5):2003-2015. doi: 10.1093/brain/awac391. PMID: 36315648Free PMC Article
Neri S, Maia N, Fortuna AM, Damasio J, Coale E, Willis M, Jorge P, Højte AF, Fenger CD, Møller RS, Bayat A
Eur J Med Genet 2022 Nov;65(11):104624. Epub 2022 Sep 18 doi: 10.1016/j.ejmg.2022.104624. PMID: 36130690
Winter-Paquette LM, Al Suwaidi HH, Sajjad Y, Bricker L
Eur J Med Genet 2022 May;65(5):104501. Epub 2022 Apr 1 doi: 10.1016/j.ejmg.2022.104501. PMID: 35378319
Zalewski CK, Sydlowski SA, King KA, Bianconi S, Dang Do A, Porter FD, Brewer CC
Am J Med Genet A 2021 Apr;185(4):1131-1141. Epub 2021 Feb 2 doi: 10.1002/ajmg.a.62087. PMID: 33529473Free PMC Article

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