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Related Concept Videos

Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

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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...
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Restless Leg Syndrome and Night Terrors01:27

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Restless Leg Syndrome (RLS), also known as Willis-Ekbom disease, is a neurological disorder characterized by an uncontrollable urge to move the legs due to uncomfortable sensations. These sensations typically occur during periods of rest or inactivity, particularly when lying down or sitting, and can severely disrupt sleep.
The exact cause of RLS is not fully understood, but it is believed to involve dopamine, a neurotransmitter that helps regulate muscle movement. Imbalances in dopamine levels...
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Myasthenia Gravis: Diagnostic Tests01:15

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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.
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Chemical Synapses01:26

Chemical Synapses

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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
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Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

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Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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Skin Diseases and Disorders01:23

Skin Diseases and Disorders

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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
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Related Experiment Video

Updated: Oct 21, 2025

Granulocyte-dependent Autoantibody-induced Skin Blistering
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An itchy rash and muscle weakness.

Brian L Risavi1, Justin Puller2, Kristin Juhasz2

  • 1Lake Erie College of Osteopathic Medicine Erie Pennsylvania USA.

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|September 6, 2021
PubMed
Summary

Dermatomyositis is a rare autoimmune disease impacting skin and muscles, often linked to cancer in specific individuals. Early diagnosis through muscle weakness and skin signs is crucial for effective treatment and monitoring. Keywords: Dermatomyositis, autoimmune disease, cancer screening.

Keywords:
dermatomyositismuscle weaknessmyopathyrash

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Area of Science:

  • Rheumatology
  • Dermatology
  • Oncology

Background:

  • Dermatomyositis is a rare idiopathic inflammatory myopathy characterized by its primary effects on the skin and muscles.
  • It is recognized for its significant association with underlying malignancies, particularly in older or at-risk populations.

Observation:

  • Clinical manifestations of dermatomyositis exhibit considerable heterogeneity.
  • Key diagnostic indicators include proximal muscle weakness and characteristic dermatological findings such as Gottron's papules and heliotrope rash.

Findings:

  • The diagnosis of dermatomyositis necessitates a high index of suspicion based on clinical presentation.
  • Prompt initiation of immunosuppressive therapy is a cornerstone of management.

Implications:

  • Continued surveillance for malignancies is essential throughout the patient's follow-up care.
  • Multidisciplinary management involving rheumatologists, dermatologists, and oncologists optimizes outcomes for dermatomyositis patients.