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King-Denborough Syndrome-Dysmorphic Features Suggesting Risk of Malignant Hyperthermia Cover

King-Denborough Syndrome-Dysmorphic Features Suggesting Risk of Malignant Hyperthermia

Open Access
|Jun 2026

Figures & Tables

Figure 1.

IGV of the mutation.

Figure 2.

Magnetic Resonance Imaging (MRI). (A-E) Selected axial T1W images of muscles of patient. (A) Arrows point to complete fatty atrophy in the gluteus maximus muscle bilaterally. (B) Arrows marks relative sparing of the right semitendinosus muscle. (C) Arrows mark hypertrophied short head of biceps femoris muscle bilaterally. (D) Arrows point to relatively hypertrophic soleus and gastrocnemius muscle bilaterally. (E) Normal muscles of the upper girdle.

Clinical features described in published KDS patients and our patients_

Total number of analyzed cases:15 (12 males / 3 females)(Male)

Symptom nameSymptom occurrenceCase 1
ptosis12+
lumbar lordosis11+
small build10+
cryptorchidism10+
antimongoloid obliquity10+
low set ears10+
kyphosis/ kyphoscoliosis9+
malignant hyperthermia9
pectus carinatum/excavatum8+
hypoplastic mandible8
motor development delay8+
webbed neck6
high arched palate5+
joint hyperextensibility5+
palpebral slant4
crowded lower teeth2
mental development delay2
scapular winging2+
clinodactyly2+
long face2
hypertelorism2+
extra fontanelle1
hip dislocation1+
strabismus1
pes cavus1+
protuberant nose1+
long upper lip1+
prominent philtrum1
scaphocephaly1
rocker bottom foot1
swallowing problem1
deep set eyes1+
DOI: https://doi.org/10.34763/jmotherandchild.20263001.d-26-00012 | Journal eISSN: 2719-535X | Journal ISSN: 2719-6488
Language: English
Page range: 116 - 122
Submitted on: Mar 17, 2026
Accepted on: Apr 23, 2026
Published on: Jun 28, 2026
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2026 Piotr Nowakowski, Karolina Czeczko, Anna Potulska-Chromik, Justyna Żelewska, Aleksandra Jastrzębska, Anna Wójcicka, Paweł Gaj, Anna Kostera-Pruszczyk, published by Institute of Mother and Child
This work is licensed under the Creative Commons Attribution 4.0 License.