noun
transient pulmonary infiltration
Medical term for a temporary shadow or opacity seen on a chest X-ray or CT scan, often resolving without specific treatment.
健康診断で一過性肺浸潤を指摘されたが、再検査では消えていた。
A transient pulmonary infiltration was noted on my health checkup, but it had disappeared on the follow-up exam.
肺浸潤 is a general term for pulmonary infiltration, while 一過性肺浸潤 specifies that it is transient or temporary.
Compound of 一過性 (transient) + 肺 (lung) + 浸潤 (infiltration). The exact historical derivation is uncertain; the term is a modern medical coinage.