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Hecht syndrome(DA7)

MedGen UID:
78540
Concept ID:
C0265226
Disease or Syndrome
Synonyms: Arthrogryposis distal type 7; DA7; Dutch-Kentucky syndrome; MOUTH, INABILITY TO OPEN COMPLETELY, AND SHORT FINGER-FLEXOR TENDONS; Trismus-Pseudocamptodactyly Syndrome
SNOMED CT: Hecht syndrome (8757006); Trismus pseudocamptodactyly syndrome (8757006); Distal arthrogryposis type 7 (8757006); Dutch Kentucky syndrome (8757006); Hecht Beals syndrome (8757006)
Modes of inheritance:
Autosomal dominant inheritance
MedGen UID:
141047
Concept ID:
C0443147
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele.
 
Gene (location): MYH8 (17p13.1)
 
Monarch Initiative: MONDO:0008016
OMIM®: 158300
Orphanet: ORPHA3377

Definition

The trismus-pseudocamptodactyly syndrome is a distal arthrogryposis characterized by an inability to open the mouth fully (trismus) and pseudocamptodactyly in which wrist dorsiflexion, but not volar flexion, produces involuntary flexion contracture of distal and proximal interphalangeal joints. In these patients, trismus complicates dental care, feeding during infancy, and intubation for anesthesia, and the pseudocamptodactyly impairs manual dexterity, with consequent occupational and social disability (summary by Veugelers et al., 2004). [from OMIM]

Clinical features

From HPO
Clubfoot
MedGen UID:
3130
Concept ID:
C0009081
Congenital Abnormality
Clubfoot is a congenital limb deformity defined as fixation of the foot in cavus, adductus, varus, and equinus (i.e., inclined inwards, axially rotated outwards, and pointing downwards) with concomitant soft tissue abnormalities (Cardy et al., 2007). Clubfoot may occur in isolation or as part of a syndrome (e.g., diastrophic dysplasia, 222600). Clubfoot has been reported with deficiency of long bones and mirror-image polydactyly (Gurnett et al., 2008; Klopocki et al., 2012).
Hammertoe
MedGen UID:
209712
Concept ID:
C1136179
Anatomical Abnormality
Hyperextension of the metatarsal-phalangeal joint with hyperflexion of the proximal interphalangeal (PIP) joint.
Cutaneous syndactyly of toes
MedGen UID:
320423
Concept ID:
C1834737
Congenital Abnormality
A soft tissue continuity in the anteroposterior axis between adjacent foot digits that involves at least half of the proximodistal length of one of the two involved digits; or, a soft tissue continuity in the A/P axis between two digits of the foot that does not meet the prior objective criteria.
Metatarsus adductus
MedGen UID:
898667
Concept ID:
C4082169
Anatomical Abnormality
The metatarsals are deviated medially (tibially), that is, the bones in the front half of the foot bend or turn in toward the body.
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).
Dysphagia
MedGen UID:
41440
Concept ID:
C0011168
Disease or Syndrome
Difficulty in swallowing.
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.
Hip dislocation
MedGen UID:
42455
Concept ID:
C0019554
Injury or Poisoning
Displacement of the femur from its normal location in the hip joint.
Micrognathia
MedGen UID:
44428
Concept ID:
C0025990
Congenital Abnormality
Developmental hypoplasia of the mandible.
Trismus
MedGen UID:
21671
Concept ID:
C0041105
Disease or Syndrome
Limitation in the ability to open the mouth.
Distal arthrogryposis
MedGen UID:
120512
Concept ID:
C0265213
Disease or Syndrome
An inherited primary limb malformation disorder characterized by congenital contractures of two or more different body areas and without primary neurologic and/or muscle disease that affects limb function.
Macrocephaly
MedGen UID:
745757
Concept ID:
C2243051
Finding
Occipitofrontal (head) circumference greater than 97th centile compared to appropriate, age matched, sex-matched normal standards. Alternatively, a apparently increased size of the cranium.
Arthrogryposis multiplex congenita
MedGen UID:
1830310
Concept ID:
C5779613
Disease or Syndrome
Multiple congenital contractures in different body areas.
Facial asymmetry
MedGen UID:
266298
Concept ID:
C1306710
Finding
An abnormal difference between the left and right sides of the face.
Deep philtrum
MedGen UID:
374311
Concept ID:
C1839797
Finding
Accentuated, prominent philtral ridges giving rise to an exaggerated groove in the midline between the nasal base and upper vermillion border.
Tall chin
MedGen UID:
867496
Concept ID:
C4021875
Anatomical Abnormality
Increased vertical distance from the vermillion border of the lower lip to the inferior-most point of the chin.
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).

Recent clinical studies

Etiology

Balkin DM, Chen I, Oberoi S, Pomerantz JH
J Craniofac Surg 2015 Sep;26(6):1954-6. doi: 10.1097/SCS.0000000000002014. PMID: 26335328
Marianetti TM, Dall'Asta L, Torroni A, Gasparini G, Pelo S
Eur J Paediatr Dent 2014 Jul;15(2 Suppl):218-20. PMID: 25101507

Diagnosis

Deng H, Lu Q, Xu H, Deng X, Yuan L, Yang Z, Guo Y, Lin Q, Xiao J, Guan L, Song Z
PLoS One 2016;11(5):e0155908. Epub 2016 May 19 doi: 10.1371/journal.pone.0155908. PMID: 27196565Free PMC Article
Meena JP, Gupta A, Mishra D, Juneja M
J Pediatr Orthop B 2015 May;24(3):226-9. doi: 10.1097/BPB.0000000000000121. PMID: 25493702
Jurko A Jr, Krsiakova J, Minarik M, Tonhajzerova I
Wien Klin Wochenschr 2013 May;125(9-10):288-90. Epub 2013 Apr 18 doi: 10.1007/s00508-013-0358-7. PMID: 23595522
Callewaert BL, Loeys BL, Ficcadenti A, Vermeer S, Landgren M, Kroes HY, Yaron Y, Pope M, Foulds N, Boute O, Galán F, Kingston H, Van der Aa N, Salcedo I, Swinkels ME, Wallgren-Pettersson C, Gabrielli O, De Backer J, Coucke PJ, De Paepe AM
Hum Mutat 2009 Mar;30(3):334-41. doi: 10.1002/humu.20854. PMID: 19006240
Jones JL, Lane JE, Logan JJ, Vanegas ME
South Med J 2002 Jul;95(7):753-5. PMID: 12144083

Therapy

Balkin DM, Chen I, Oberoi S, Pomerantz JH
J Craniofac Surg 2015 Sep;26(6):1954-6. doi: 10.1097/SCS.0000000000002014. PMID: 26335328

Prognosis

Balkin DM, Chen I, Oberoi S, Pomerantz JH
J Craniofac Surg 2015 Sep;26(6):1954-6. doi: 10.1097/SCS.0000000000002014. PMID: 26335328
Marianetti TM, Dall'Asta L, Torroni A, Gasparini G, Pelo S
Eur J Paediatr Dent 2014 Jul;15(2 Suppl):218-20. PMID: 25101507

Clinical prediction guides

Marianetti TM, Dall'Asta L, Torroni A, Gasparini G, Pelo S
Eur J Paediatr Dent 2014 Jul;15(2 Suppl):218-20. PMID: 25101507
Callewaert BL, Loeys BL, Ficcadenti A, Vermeer S, Landgren M, Kroes HY, Yaron Y, Pope M, Foulds N, Boute O, Galán F, Kingston H, Van der Aa N, Salcedo I, Swinkels ME, Wallgren-Pettersson C, Gabrielli O, De Backer J, Coucke PJ, De Paepe AM
Hum Mutat 2009 Mar;30(3):334-41. doi: 10.1002/humu.20854. PMID: 19006240

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