Definition

Noun: 1. A secondary, often adverse, condition or consequence that arises as a direct result of a previous disease, injury, or medical treatment. It refers to a pathological state that follows and is caused by an initial illness or trauma, rather than being a new, unrelated condition.

Usage

• The term is primarily used in formal medical and clinical contexts to describe the long-term or residual effects of a health condition.
• It is often used in its plural form, sequelae (pronounced /sɪˈkwiːliː/), as a single disease can lead to multiple after-effects.
• It describes a causal link: the sequela exists the prior condition.

Examples

• Noun:
  • Chronic joint pain is a common sequela of Lyme disease.
  • The patient presented with several neurological sequelae following the severe head injury.
  • Scarring is an unfortunate sequela of that particular surgical procedure.

Advanced Usage

• "Long-term sequelae": Emphasizes consequences that persist for an extended period after the initial condition has resolved.
  • Researchers are studying the long-term sequelae of COVID-19 infection.
• "Potential sequelae": Refers to possible adverse outcomes that may arise.
  • The doctor explained the potential sequelae of the chemotherapy.

Variants and Related Words

• Sequelae (n., plural): The most common form used to refer to multiple after-effects.
  • The sequelae of polio can include muscle weakness and paralysis.

Synonyms

• Aftereffect: A simpler, more general term for any effect that follows an event.
• Consequence: A broad term for a result or effect of an action or condition.
• Complication: A medical term for a secondary disease or condition that aggravates an original one (can be similar but often implies an unexpected worsening).
• Residual: Used as an adjective (e.g., residual symptoms) to describe what remains.

Antonyms

• Cause: The agent that produces an effect.
• Precursor: A forerunner or thing that precedes and indicates the approach of another.

Notes on Meaning

• Sequela vs. Complication: A is a direct consequence that follows a disease. A is a negative development that occurs during the course of a disease, often making it worse. For example, pneumonia can be a of influenza, while permanent lung damage could be a of severe pneumonia.
• Sequela vs. Symptom: A is a subjective indication of a disease experienced by the patient (e.g., pain, nausea) during the acute phase. A is an objective condition that remains the acute disease has subsided (e.g., a scar, paralysis).

Noun

1. any abnormality following or resulting from a disease or injury or treatment
   • paralysis is one of the sequelae of poliomyelitis