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Kahrizi syndrome(KHRZ)

MedGen UID:
382543
Concept ID:
C2675185
Disease or Syndrome
Synonyms: KHRZ; MENTAL RETARDATION, CATARACT, COLOBOMA, AND KYPHOSIS, AUTOSOMAL RECESSIVE
 
Gene (location): SRD5A3 (4q12)
 
Monarch Initiative: MONDO:0012991
OMIM®: 612713
Orphanet: ORPHA168972

Definition

Kahrizi syndrome is an autosomal recessive neurodevelopmental disorder characterized by mental retardation, cataracts, coloboma, kyphosis, and coarse facial features (summary by Kahrizi et al., 2009). See also congenital disorder of glycosylation type Iq (CDG1Q; 612379), an allelic disorder with overlapping features. [from OMIM]

Clinical features

From HPO
Knee flexion contracture
MedGen UID:
98042
Concept ID:
C0409355
Finding
A type of knee joint contracture in which the knee is in a fixed bent (flexed) configuration such that it cannot be straightened actively or passively.
Short stature
MedGen UID:
87607
Concept ID:
C0349588
Finding
A height below that which is expected according to age and gender norms. Although there is no universally accepted definition of short stature, many refer to "short stature" as height more than 2 standard deviations below the mean for age and gender (or below the 3rd percentile for age and gender dependent norms).
Seizure
MedGen UID:
20693
Concept ID:
C0036572
Sign or Symptom
A seizure is an intermittent abnormality of nervous system physiology characterized by a transient occurrence of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain.
Intellectual disability, severe
MedGen UID:
48638
Concept ID:
C0036857
Mental or Behavioral Dysfunction
Severe mental retardation is defined as an intelligence quotient (IQ) in the range of 20-34.
Motor delay
MedGen UID:
381392
Concept ID:
C1854301
Finding
A type of Developmental delay characterized by a delay in acquiring motor skills.
Thoracic kyphosis
MedGen UID:
263148
Concept ID:
C1184919
Finding
Over curvature of the thoracic region, leading to a round back or if sever to a hump.
Elbow contracture
MedGen UID:
331445
Concept ID:
C1833142
Anatomical Abnormality
A limitation in the passive range of motion of the elbow resulting from loss of elasticity in the periarticular tissues owing to structural changes of non-bony tissues, such as muscles, tendons, ligaments, joint capsules or skin.
Bulbous nose
MedGen UID:
66013
Concept ID:
C0240543
Finding
Increased volume and globular shape of the anteroinferior aspect of the nose.
Thick vermilion border
MedGen UID:
332232
Concept ID:
C1836543
Finding
Increased width of the skin of vermilion border region of upper lip.
Wide nasal bridge
MedGen UID:
341441
Concept ID:
C1849367
Finding
Increased breadth of the nasal bridge (and with it, the nasal root).
Facial hemangioma
MedGen UID:
348361
Concept ID:
C1861443
Finding
Hemangioma, a benign tumor of the vascular endothelial cells, occurring in the face.
Cataract
MedGen UID:
39462
Concept ID:
C0086543
Disease or Syndrome
A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule.
Iris coloboma
MedGen UID:
116097
Concept ID:
C0240063
Anatomical Abnormality
A coloboma of the iris.

Professional guidelines

PubMed

Jaeken J, Lefeber DJ, Matthijs G
Eur J Hum Genet 2020 Sep;28(9):1297-1300. Epub 2020 May 18 doi: 10.1038/s41431-020-0647-3. PMID: 32424323Free PMC Article

Recent clinical studies

Etiology

Kahrizi K, Hu CH, Garshasbi M, Abedini SS, Ghadami S, Kariminejad R, Ullmann R, Chen W, Ropers HH, Kuss AW, Najmabadi H, Tzschach A
Eur J Hum Genet 2011 Jan;19(1):115-7. Epub 2010 Aug 11 doi: 10.1038/ejhg.2010.132. PMID: 20700148Free PMC Article

Diagnosis

Jaeken J, Lefeber DJ, Matthijs G
Eur J Hum Genet 2020 Sep;28(9):1297-1300. Epub 2020 May 18 doi: 10.1038/s41431-020-0647-3. PMID: 32424323Free PMC Article

Therapy

Basel-Vanagaite L, Smirin-Yosef P, Essakow JL, Tzur S, Lagovsky I, Maya I, Pasmanik-Chor M, Yeheskel A, Konen O, Orenstein N, Weisz Hubshman M, Drasinover V, Magal N, Peretz Amit G, Zalzstein Y, Zeharia A, Shohat M, Straussberg R, Monté D, Salmon-Divon M, Behar DM
Hum Genet 2015 Jun;134(6):577-87. Epub 2015 Mar 20 doi: 10.1007/s00439-015-1541-x. PMID: 25792360

Clinical prediction guides

Kahrizi K, Hu CH, Garshasbi M, Abedini SS, Ghadami S, Kariminejad R, Ullmann R, Chen W, Ropers HH, Kuss AW, Najmabadi H, Tzschach A
Eur J Hum Genet 2011 Jan;19(1):115-7. Epub 2010 Aug 11 doi: 10.1038/ejhg.2010.132. PMID: 20700148Free PMC Article

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