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Spondyloepimetaphyseal dysplasia with joint laxity, type 3(SEMDJL3)

MedGen UID:
1677378
Concept ID:
C5193073
Disease or Syndrome
Synonyms: SEMDJL3; SPONDYLOEPIMETAPHYSEAL DYSPLASIA WITH JOINT LAXITY, TYPE 3
SNOMED CT: Spondyloepimetaphyseal dysplasia with joint laxity type 3 (1286834000); Spondyloepimetaphyseal dysplasia with joint laxity exocyst complex component 6B type (1286834000); SEMDJL3 - spondyloepimetaphyseal dysplasia with joint laxity type 3 (1286834000); Spondyloepimetaphyseal dysplasia with joint laxity, EXOC6B type (1286834000)
 
Gene (location): EXOC6B (2p13.2)
 
Monarch Initiative: MONDO:0032724
OMIM®: 618395

Definition

Spondyloepimetaphyseal dysplasia with joint laxity-3 (SEMDJL3) is characterized by multiple joint dislocations at birth, severe joint laxity, scoliosis, gracile metacarpals and metatarsals, delayed bone age, and poorly ossified carpal and tarsal bones (Girisha et al., 2016). For a discussion of genetic heterogeneity of SEMD with joint laxity, see SEMDJL1 (271640). [from OMIM]

Clinical features

From HPO
Pes planus
MedGen UID:
42034
Concept ID:
C0016202
Anatomical Abnormality
A foot where the longitudinal arch of the foot is in contact with the ground or floor when the individual is standing; or, in a patient lying supine, a foot where the arch is in contact with the surface of a flat board pressed against the sole of the foot by the examiner with a pressure similar to that expected from weight bearing; or, the height of the arch is reduced.
Knee dislocation
MedGen UID:
102364
Concept ID:
C0159970
Injury or Poisoning
Slippage of the FEMUR off the TIBIA.
Dislocated radial head
MedGen UID:
488814
Concept ID:
C0265563
Congenital Abnormality
A dislocation of the head of the radius from its socket in the elbow joint.
Tapered finger
MedGen UID:
98098
Concept ID:
C0426886
Finding
The gradual reduction in girth of the finger from proximal to distal.
Delayed ossification of carpal bones
MedGen UID:
374771
Concept ID:
C1841684
Finding
Ossification of carpal bones occurs later than age-adjusted norms.
Hypoplasia of the ulna
MedGen UID:
395934
Concept ID:
C1860614
Congenital Abnormality
Underdevelopment of the ulna.
Carpal bone hypoplasia
MedGen UID:
355049
Concept ID:
C1863749
Finding
Underdevelopment of one or more carpal bones.
Obesity
MedGen UID:
18127
Concept ID:
C0028754
Disease or Syndrome
Accumulation of substantial excess body fat.
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).
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.
Hip dislocation
MedGen UID:
42455
Concept ID:
C0019554
Injury or Poisoning
Displacement of the femur from its normal location in the hip joint.
Scoliosis
MedGen UID:
11348
Concept ID:
C0036439
Disease or Syndrome
The presence of an abnormal lateral curvature of the spine.
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.
Multiple joint dislocation
MedGen UID:
90698
Concept ID:
C0332792
Injury or Poisoning
Dislocation of many joints.
Thin ribs
MedGen UID:
98095
Concept ID:
C0426818
Finding
Ribs with a reduced diameter.
Spondyloepimetaphyseal dysplasia
MedGen UID:
609408
Concept ID:
C0432211
Disease or Syndrome
An osteochondrodysplasia that results in abnormalities of bone growth in the vertebral column, epiphysis, and metaphysis.
Patellar dislocation
MedGen UID:
253896
Concept ID:
C1135812
Injury or Poisoning
The kneecap normally is located within the groove termed trochlea on the distal femur and can slide up and down in it. Patellar dislocation occurs if the patella fully dislocates out of the groove.
Narrow vertebral interpedicular distance
MedGen UID:
318662
Concept ID:
C1832598
Finding
A reduction of the distance between vertebral pedicles, which are the two short, thick processes, which project backward, one on either side, from the upper part of the vertebral body, at the junction of its posterior and lateral surfaces.
Short femoral neck
MedGen UID:
373033
Concept ID:
C1836184
Finding
An abnormally short femoral neck (which is the process of bone, connecting the femoral head with the femoral shaft).
Metaphyseal irregularity
MedGen UID:
325478
Concept ID:
C1838662
Finding
Irregularity of the normally smooth surface of the metaphyses.
Irregular vertebral endplates
MedGen UID:
331233
Concept ID:
C1842153
Finding
An irregular surface of the vertebral end plates, which are normally relatively smooth.
Platyspondyly
MedGen UID:
335010
Concept ID:
C1844704
Finding
A flattened vertebral body shape with reduced distance between the vertebral endplates.
Joint hypermobility
MedGen UID:
336793
Concept ID:
C1844820
Finding
The capability that a joint (or a group of joints) has to move, passively and/or actively, beyond normal limits along physiological axes.
Short neck
MedGen UID:
99267
Concept ID:
C0521525
Finding
Diminished length of the neck.

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