An easily missed tumor in cats is one that develops under their tongue. This is an aggressive tumor called squamous cell carcinoma. This tumor is often only spotted when the cat is showing obvious signs of being unwell such an being unable or unwilling to eat, drooling or the cat may develop a swelling around their lower jaw.
To spot this tumor early your vet should check under your cat's tongue every time they are examined. Learn the most important things you need to know about this tumor in my video that is less than a minute long!