Walshe P, Low C, Lucey D, Hone S, O'Dwyer T
The Mater Misericordiae Hospital, Dublin 7.
Ir Med J. 2005 Apr;98(4):110-1.
This paper describes three cases of patients presenting with lumps in their parotid gland, the origin of which was difficult to define. In each case the past medical history revealed that the patients had undergone previous ipsilateral middle ear surgery. We highlight the fact that where there has been previous incisions in the skin about the ear, there is a risk of epidermal inclusion cysts in the parotid gland. These cysts can occur many years after the initial surgery and therefore may not be identified as an obvious origin to lumps in the parotid gland. Rarely as this series highlights there may also be extension of a cholesteatoma (a collection of keratin which arises from the eardrum and extends into the middle ear space) from the mastoid bone to the parotid gland. We recommend formal ear examination where there is a history of previous ear surgery and an ipsilateral parotid gland lump is present.
本文描述了3例腮腺出现肿块的患者，其肿块起源难以确定。在每例病例中，既往病史显示患者曾接受同侧中耳手术。我们强调，既往耳部周围皮肤有切口的情况下，腮腺存在表皮样囊肿的风险。这些囊肿可能在初次手术后数年出现，因此可能不会被视为腮腺肿块的明显起源。正如本系列病例所凸显的，胆脂瘤（一种由鼓膜产生并延伸至中耳腔的角蛋白聚集体）从乳突骨延伸至腮腺的情况很少见。我们建议，对于有既往耳部手术史且同侧腮腺出现肿块的患者进行正规耳部检查。
