A lump behind the ear can have many possible causes. The most common include swollen lymph nodes caused by an uncomplicated infection. These lumps are typically harmless and relatively easy to treat.

This has led to occasional comparisons with ductal papillomas in breast tissue. 4 Diagnosis relies on histological examination, which reveals a partially solid or solid cystic dermal lesion with ...

Arrhythmias—Intramyocardial and intracavity tumours may both affect cardiac rhythm, either through direct infiltration of the conduction tissue, or through irritation of the myocardium itself.