[Encopresis revealing myotonic dystrophy in 2 children]

J Avez-Couturier1, L Michaud, J-M Cuisset

  • 1Unité de gastroentérologie, hépatologie et nutrition, clinique de pédiatrie, hôpital Jeanne-de-Flandre, CHRU de Lille, avenue Eugène-Avinée, 59037 Lille cedex, France.

Insights

Gastrointestinal issues are common in myotonic dystrophy and can be early signs. Prompt evaluation for encopresis in children may reveal this genetic disorder, improving management.

Area of Science:

  • Neurology
  • Gastroenterology
  • Genetics

Context:

  • Gastrointestinal (GI) symptoms are frequently observed in patients with myotonic dystrophy but often overlooked.
  • These GI manifestations can be the initial indicators of the disease, prompting diagnostic investigation.

Purpose:

  • To highlight the significance of gastrointestinal symptoms as potential early signs of myotonic dystrophy.
  • To present two pediatric cases where encopresis led to the diagnosis of myotonic dystrophy.
  • To emphasize the importance of considering myotonic dystrophy in the differential diagnosis of unexplained encopresis.

Summary:

  • This study reports two pediatric cases of myotonic dystrophy presenting with persistent encopresis unresponsive to laxative treatment.
  • Diagnosis was established through neurological examination and anorectal manometry.
  • Initiation of procainamide treatment led to improvement in the digestive symptoms.

Impact:

  • Underscores the need for a comprehensive evaluation for myotonic dystrophy in children with encopresis.
  • Recommends that physicians actively screen for upper and/or lower GI symptoms in all myotonic dystrophy patients.
  • Enhances early diagnosis and management of myotonic dystrophy by recognizing its diverse clinical presentations.

Related Concept Videos

Alterations in Muscle Tone lll01:11

Alterations in Muscle Tone lll

Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Satellite Stem Cells and Muscular Dystrophy01:21

Satellite Stem Cells and Muscular Dystrophy

Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
Alterations in Muscle Tone ll01:12

Alterations in Muscle Tone ll

Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...
Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...