A patient with a confirmed brain tumour affecting the left temporal lobe has marked difficulty finding the right words in conversation, though her comprehension of what is said to her remains largely intact, and there are no other signs of broader psychiatric disturbance. Before revealing the answer: is this best classified as aphasia?

Yes. This is aphasia: a language disturbance resulting from a specific, identifiable brain lesion, here a confirmed tumour, with the difficulty disproportionately affecting language production specifically rather than reflecting a broader disorganisation of thought — exactly the pattern the phenomenon's own recognition features describe. The specific pattern (difficulty with word-finding, preserved comprehension) is also useful for narrowing which sub-type of aphasia is most likely present.