Total 14 clinical symptoms reported for Duchenne muscular dystrophy 
Calf muscle hypertrophy Muscle hypertrophy affecting the calf muscles.
 
Synonyms:Calf hypertrophy; Increased size of calf muscles; Muscular hypertrophy of the calf muscles
Very frequent
Cardiomyopathy A myocardial disorder in which the heart muscle is structurally and functionally abnormal, in the absence of coronary artery disease, hypertension, valvular disease and congenital heart disease sufficient to cause the observed myocardial abnormality.
 
Synonyms:Disease of the heart muscle
Very frequent
Cognitive impairment Abnormal cognition with deficits in thinking, reasoning, or remembering.
 
Synonyms:Abnormality of cognition; Cognitive abnormality; Cognitive defects; Cognitive deficits; Cognitive impairment; Intellectual impairment
Very frequent
Delayed speech and language development A degree of language development that is significantly below the norm for a child of a specified age.
 
Synonyms:Deficiency of speech development; Delayed language development; Delayed speech; Delayed speech acquisition; Delayed speech and language development; Delayed speech development; Impaired speech and language development; Impaired speech development; Language delay; Language delayed; Language development deficit; Late-onset speech development; Poor language development; Speech and language delay; Speech and language difficulties; Speech delay
Very frequent
Flexion contracture A flexion contracture is a bent (flexed) joint that 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 of joints.
 
Synonyms:Contracture; Flexed joint that cannot be straightened; Flexion contractures; Flexion contractures of joints; Joint contracture; Joint contractures
Very frequent
Global developmental delay 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.
 
Synonyms:Delayed cognitive development; Delayed development; Delayed developmental milestones; Delayed intellectual development; Delayed milestones; Delayed psychomotor development; Developmental delay; Developmental delay in early childhood; Developmental delay, global; Developmental retardation; Lack of psychomotor development; Motor and developmental delay; Psychomotor delay; Psychomotor development deficiency; Psychomotor development failure; Psychomotor developmental delay; Retarded development; Retarded mental development; Retarded psychomotor development
Very frequent
Motor delay A type of Developmental delay characterized by a delay in acquiring motor skills.
 
Synonyms:Delay in motor development; Delayed early motor milestones; Delayed motor development; Delayed motor milestones; Locomotor delay; Motor developmental delay; Motor developmental milestones not achieved; Motor retardation; Retarded motor development
Very frequent
Progressive muscle weakness
 
Synonyms:Muscle weakness, progressive; Progressive muscular weakness
Very frequent
Proximal muscle weakness A lack of strength of the proximal muscles.
 
Synonyms:Muscle weakness, proximal; Proximal limb muscle weakness; Proximal limb weakness; Weakness in muscles of upper arms and upper legs
Very frequent
Respiratory insufficiency
 
Synonyms:Respiratory impairment
Very frequent
Scoliosis The presence of an abnormal lateral curvature of the spine.
 
Very frequent
Skeletal muscle atrophy The presence of skeletal muscular atrophy (which is also known as amyotrophy).
 
Synonyms:Amyotrophy; Amyotrophy involving the extremities; Muscle atrophy; Muscle atrophy, neurogenic; Muscle degeneration; Muscle hypotrophy; Muscle wasting; Muscular atrophy; Neurogenic muscle atrophy; Neurogenic muscle atrophy, especially in the lower limbs; Neurogenic muscular atrophy
Very frequent
Specific learning disability Impairment of certain skills such as reading or writing, coordination, self-control, or attention that interfere with the ability to learn. The impairment is not related to a global deficiency of intelligence.
 
Very frequent
Waddling gait Weakness of the hip girdle and upper thigh muscles, for instance in myopathies, leads to an instability of the pelvis on standing and walking. If the muscles extending the hip joint are affected, the posture in that joint becomes flexed and lumbar lordosis increases. The patients usually have difficulties standing up from a sitting position. Due to weakness in the gluteus medius muscle, the hip on the side of the swinging leg drops with each step (referred to as Trendelenburg sign). The gait appears waddling. The patients frequently attempt to counteract the dropping of the hip on the swinging side by bending the trunk towards the side which is in the stance phase (in the German language literature this is referred to as Duchenne sign). Similar gait patterns can be caused by orthopedic conditions when the origin and the insertion site of the gluteus medius muscle are closer to each other than normal, for instance due to a posttraumatic elevation of the trochanter or pseudarthrosis of the femoral neck.
 
Synonyms:'Waddling' gait; Waddling walk
Very frequent