It's laryngeal edema.

这是咽喉水肿
There's also evidence of eosinophilia in the lungs.

肺部还有嗜酸粒细胞增多的迹象
Anaphylaxis.

过敏反应
According to his medical records,

根据医疗记录
he had a severe almond allergy.

他对杏仁严重过敏
Even trace amounts would've caused his throat to swell shut,

即使微量也会引起咽喉肿胀堵塞
resulting in asphyxiation.

导致窒息
But we know that he was hit in the head with a frozen leg of lamb.

但我们知道他是被冰冻的羊腿击中了头部
Maybe, maybe not.

可能是也可能不是
It's possible that when Mr. LeBlanc started losing consciousness

当勒布朗克先生因过敏开始失去意识
from the anaphylaxis,

倒下时头正好撞到羊腿上
he fell, hitting his head on the leg of lamb.

这也是完全可能的