Kashiwagi Nobuo, Murakami Takamichi, Toguchi Masafumi, Nakanishi Katsuyuki, Hidaka Shojiro, Fukui Hideyuki, Kimura Masatomo, Kitano Mutsukazu, Tomiyama Noriyuki
1 Department of Radiology, Kindai University Faculty of Medicine, Osaka, Japan.
2 Department of Radiology, Ryukyus University Faculty of Medicine, Okinawa, Japan.
Dentomaxillofac Radiol. 2016 Oct;45(8):20160201. doi: 10.1259/dmfr.20160201. Epub 2016 Oct 11.
To present and characterize CT and MR imaging findings of metastases to the parotid nodes.
CT (n = 10) and MR (n = 11) images from 14 patients with metastases to the parotid nodes were reviewed. The primary tumour sites were the ocular adnexa in five patients, facial skin in four patients, upper aerodigestive tract in four patients and thyroid gland in one patient. CT and MR images were evaluated with emphasis on the size and number of parotid tumours, their location in the parotid gland, the presence of associated clinically pathological cervical nodes or previous history of cervical node metastasis, margin characteristics and the presence of central necrosis.
A total of 18 tumours were identified in 14 patients, with an average maximal cross-sectional diameter of 19 mm (7-44 mm). 12 patients had a single parotid tumour and 2 patients had unilateral multiple tumours; 12 tumours in 10 patients were located in the parotid tail, 6 tumours in 4 patients were located in the superficial lobe and no tumour was noted in the deep lobe. In the superficial lobe, four of six tumours were located in the pretragal area. Three of nine patients whose primary sites were the ocular adnexa or skin had associated clinically pathological cervical nodes. None of these patients had a previous history of cervical node metastasis. All five patients with other primary sites had associated pathological cervical nodes or a history of such. 11 tumours had well-defined margins and 7 tumours had ill-defined margins. Post-contrast images showed central necrosis in 2 of 11 tumours.
Metastases to the parotid nodes tend to present as solitary parotid masses with two preferential sites.
呈现并描述腮腺淋巴结转移瘤的CT和MR成像表现。
回顾了14例腮腺淋巴结转移瘤患者的CT（n = 10）和MR（n = 11）图像。原发肿瘤部位：5例为眼附属器，4例为面部皮肤，4例为上消化道，1例为甲状腺。对CT和MR图像进行评估，重点关注腮腺肿瘤的大小和数量、在腮腺内的位置、是否存在相关的临床病理颈部淋巴结或既往颈部淋巴结转移史、边缘特征以及是否存在中央坏死。
14例患者共发现18个肿瘤，平均最大横截面直径为19 mm（7 - 44 mm）。12例患者有单个腮腺肿瘤，2例患者有单侧多发肿瘤；10例患者中的12个肿瘤位于腮腺尾部，4例患者中的6个肿瘤位于浅叶，深叶未发现肿瘤。在浅叶，6个肿瘤中的4个位于耳屏前区域。9例原发部位为眼附属器或皮肤的患者中有3例伴有临床病理颈部淋巴结。这些患者均无既往颈部淋巴结转移史。其他原发部位的5例患者均伴有病理颈部淋巴结或有相关病史。11个肿瘤边缘清晰，7个肿瘤边缘不清。增强后图像显示11个肿瘤中有2个存在中央坏死。
腮腺淋巴结转移瘤倾向于表现为孤立的腮腺肿块，有两个好发部位。
