Most of mucous retention phenomena occurred in the mucous secretory glands, 1 e ‘ minor salivary gland, sublingual gland and submandibular gland. The mucous retention cyst from parotid gland has been very rarely reported in the literature As the parotid gland is composed of serous acini, the serous saliva is less likely to produce the retention phenomenon in the ducts or extraductal tissue. Here, a case of mucous retention cyst in parotid gland was demonstrated The patient of this case has been complaining of recurrent swelling of right cheek in parotid gland a'rea, and showed a feature of chronic sialadenitis or benign salivary gland tumor. The extravasated serous saliva was diffusely dispersed into the adjacent connective tissue, forming an ill-defined cyst cavity with hyalinized sclerotic luminal surface The inflammatory reaction was relatively mild compared to the extensive destruction of periglandular connective tissue However, the typical foamy macrophage was not seen but the infiltrated macrophages containing abundant eosi nophilic cytoplasm. The mucous retention phenomenon could be very rare in parotid gland, which is also easily distinguishable from chronic sialadenitis or benign tumor through path이ogical examination.

• 이상신(강릉대학교 치과대학 구강병리학교실) | Sang Shin Lee
• 송지용(강릉대학교 치과대학 구강병리학교실) | Ji Yong Song
• 김연숙(강릉대학교 치과대학 구강병리학교실) | Yeon Sook Kim
• 이석근(강릉대학교 치과대학 구강병리학교실) | Suk Keun Lee correspondence
• 권순규(강릉대학교 치과대학 구강병리학교실) | Soon Kyu Kwon
• 이종원(구강악안면외과학 교실) | Jong Won Lee
• 김성민(구강악안면외과학 교실) | Soung Min Kim