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Difficulty: MediumSubstance-Related and Addictive Disorders

Match each clinical presentation of a substance-related medical complication to the substance most likely responsible for the patient's condition.

  • A 32-year-old man presents with acute chest pain, hypertension, and examination reveals perforation of the nasal septum.Cocaine
  • A 24-year-old woman presents with severe dental caries, multiple facial excoriations, and delusions of parasitosis.Methamphetamine
  • A 21-year-old man presents with cyclical, intractable vomiting and abdominal pain that is temporarily relieved by taking prolonged hot showers.Cannabis
  • A 45-year-old man presents with a broad-based ataxic gait, bilateral abducens nerve palsy, and profound global confusion.Alcohol
  • A 28-year-old man with needle track marks presents with high fever and multiple nodular cavitary lesions on a chest radiograph.Heroin

Answer

The correct pairings match each specific medical complication to its characteristic substance of abuse based on pathognomonic physical exam findings and history.
Each clinical scenario presents pathognomonic physical exam findings or medical sequelae that uniquely identify the underlying substance of abuse. Recognizing these distinct patterns is essential for accurate diagnosis and management in both emergency and primary care settings.

Step-by-Step Solution

1
Analyze the patient with nasal septal perforation and chest pain.
This presentation is classically associated with cocaine use.
Cocaine causes intense local vasoconstriction, leading to ischemic necrosis of the nasal septum with chronic use. Acutely, it causes coronary vasospasm.
2
Analyze the patient with severe dental caries, facial excoriations, and delusions of parasitosis.
This matches methamphetamine use.
Chronic methamphetamine abuse results in 'meth mouth' (bruxism and poor dentition) and tactile hallucinations (formication), causing the patient to chronically pick at their skin.
3
Analyze the patient with cyclical vomiting relieved by hot showers.
This is pathognomonic for cannabinoid hyperemesis syndrome.
Long-term cannabis use can paradoxically cause severe recurrent vomiting, which patients learn to self-treat with compulsive exposure to hot water.
4
Analyze the patient with ataxia, abducens palsy, and confusion.
This triad indicates Wernicke encephalopathy, caused by chronic alcohol use.
Alcohol abuse leads to poor nutrition and thiamine (Vitamin B1) deficiency, presenting with the classic triad of encephalopathy, oculomotor dysfunction, and gait ataxia.
5
Analyze the patient with needle track marks and cavitary lung lesions.
This presentation points to intravenous heroin use.
Intravenous drug users are at high risk for tricuspid valve endocarditis (typically S. aureus), which showers the lungs with septic emboli, creating nodular cavitary lesions.

Key Concept

Medical complications of substance use disorders
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Topics

Substance-Related and Addictive Disorders

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