Source / episode info

• **Episode:**403
• **Title:**Divine Intervention Episode 403 – USMLE Step 2/3 Rapid Review Series 79
• **Published:**2022-07-16
• Source:Episode page

One-liner

This episode provides a high-yield review covering social services reporting protocols (child/elder abuse), the pathophysiology of hypercoagulable states triggered by malignancy or nephrotic syndrome, key differentiations among GI motility disorders (GERD vs. Achalasia), and advanced neurobiology topics like PML, Parkinson's disease, and Alzheimer's disease.

High-yield summary

• Elder/Child Abuse: Suspected abuse in children requires contacting Child Protective Services (CPS); suspected neglect or abuse in the elderly requires contacting Adult Protective Services (APS). Intimate partner violence is managed through counseling and safety planning, not typically reported to APS/CPS.
• Hypercoagulability: Any malignancy increases the risk of thrombosis due to cytokine release and procoagulant factors. Anticoagulation with Heparin or LMWH is generally preferred over Warfarin in cancer patients because it allows for rapid reversal if bleeding occurs.
• PML Pathophysiology: Progressive Multifocal Leukoencephalopathy (PML) is caused by the reactivation of the JC virus, which infects and destroys oligodendrocytes, leading to demyelination in the white matter. This is common in immunocompromised states (e.g., advanced HIV).
• GI Motility Disorders: Achalasia involves failure of the Lower Esophageal Sphincter (LES) to relax upon swallowing, presenting with a "bird's beak" sign on barium swallow. GERD is characterized by transient LES relaxation and acid reflux; initial management is PPI therapy.
• Neurodegenerative Patterns: In Alzheimer's disease, pathology involves extracellular Amyloid plaques and intracellular neurofibrillary tangles (composed of hyperphosphorylated Tau protein). Parkinson's disease is associated with the loss of dopaminergic neurons in the substantia nigra pars compacta, visible post-mortem as Lewy bodies.

Learning objectives

• Differentiate mandatory reporting protocols for suspected child and elder abuse.
• Identify the pathophysiology and initial management of various GI motility disorders (GERD, Achalasia, Diffuse Esophageal Spasm).
• Recognize the clinical presentation and underlying pathology of hypercoagulable states associated with malignancy or nephrotic syndrome.
• Correlate neurological symptoms (e.g., progressive weakness, white matter lesions) with specific infectious/degenerative processes (PML, AD, PD).
• Understand the role of PPIs in GERD management and when advanced testing (EGD, pH monitoring) is required.

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