How to Say "effusion" in Spanish
The Spanish word for “effusion” is “derrame” — B2 level.
English → SpanishB2
nounB2
fluid buildup, e.g., in the knee

Examples
Mi tío se está recuperando de un derrame cerebral.
My uncle is recovering from a stroke.
El médico dijo que tenía un derrame en la rodilla.
The doctor said he had fluid on the knee.
Un fuerte golpe puede causar un derrame interno.
A heavy blow can cause internal bleeding.
Using Adjectives
To specify which medical issue it is, always add an adjective like 'cerebral' (brain) or 'articular' (joint).
Confusing with 'Ataque'
Mistake: “Tuvo un ataque cerebral.”
Correction: While understood, 'derrame cerebral' is the more common way to describe a stroke caused by bleeding.
Related Translations
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