癌
=
嵒
+
疒
:
Albert Einstein (Ø) got a colorful rash (疒) and he thinks it is cancer (癌). In the airplane's kitchen (ai2) he found a food pyramid (嵒) which he devours using a fork (嵒).
症
=
正
+
疒
:
The stick figure (正) is visiting James II of England (zh) in the engine's bathroom ((e)ng4) to have him investigate his colorful rash (疒). Unfortunately James II of England has to tell him that he has cancer (症).