52 results
Meralgia paresthetica: Pathogenesis and Clinical Findings
Compression/injury of Lateral Femoral Cutaneous Nerve (LFCN) -> Meralgia paresthetica
 •
Femoral Cutaneous Nerve ... rarely follow dermatomal ... MeralgiaParesthetica #MSK #pathophysiology ... #differential # ... diagnosis #signs
Radiculopathy: Signs and Symptoms
 • Back/Neck Pain
 • Decr Range of motion
 • Abnormal posturing
 •
Radiculopathy: Signs ... supplied by the nerve ... disturbance in nerve ... root's dermatome ... #symptoms #pathophysiology
Maculopapular - Diagnostic Algorithm
Pathophysiology:
- Catch-all term with a wide range of potential pathophysiologic mechanisms and causative
Diagnostic Algorithm Pathophysiology ... range of potential pathophysiologic ... - Pathophysiology ... Ill-appearing, vital sign ... Targetoid #Algorithm #Differential
Giant Cell (Temporal) Arteritis: Pathogenesis and investigations
Risk Factors:
 - Unclear environmental triggers (may be viral, not
GCA is almost never ... yrs old; F>M Signs ... Temporal #Arteritis #Pathophysiology ... #Diagnosis #Signs
Spinal Cord Injury by Nerve Root Levels
Spinal Root	Sensory	Motor	Reflex
C4	Acromioclavicular Joint	Respiration	None
C5	Radial Antecubital Fossa	Elbow Flexion	Biceps Reflex
C6	Dorsal Thumb	Wrist Extension	Brachioradialis Reflex
C7	Dorsal
Cord Injury by Nerve ... None T7-T12 See Dermatomes ... NerveRoots #Levels #differential
Cauda Equina Syndrome
Causes:
 • Large lumbar degenerative disc herniation (central)
 • Severe lumbar spondylosis
 • Neoplasm
lumbar spine Signs ... damage to sacral nerves ... Syndrome #MSK #pathophysiology ... diagnosis #symptoms #signs
Weakness - Differential Diagnosis Framework

Approach To Weakness:
 • Non-neuromuscular disorder (Cardiac, pulmonary etc)
 • CNS ->
Weakness - Differential ... of the central nervous ... Mononeuropathy: Nerve ... Lack of UMN/LMN signs ... #Weakness #Differential
Pustular Skin Lesions - Differential Diagnosis Framework

What are pustules?
• Pustules < 5-10 mm + pus
• Material
Skin Lesions - Differential ... Herpes zoster 3 ... Erosive pustular dermatosis ... Subcorneal pustular dermatosis ... Skin #Lesions #Differential
Anterior Shoulder Dislocation: Pathogenesis, clinical, and radiographic findings

Trauma, Fall on, outstretched arm, Overhead throwing => Abduction
Structural damage to nerves ... Dislocation #Diagnosis #signs ... #orthopedics #pathophysiology
Common Dermatological Conditions - Distribution and Morphology
 • Acne vulgaris - Face, upper back, chest -
associated with signs ... zoster - Dermatomal ... Vesicles limited to a dermatome ... Transient acantholytic dermatosis ... dermatology #rash #differential