Wu Jingtao, Zhu Qingqiang, Zhu Wenrong, Chen Wenxin, Wang Shouan
Department of Medical Imaging, Subei People's Hospital, Medical School of Yangzhou University, Yangzhou, China.
Br J Radiol. 2015;88(1056):20140434. doi: 10.1259/bjr.20140434. Epub 2015 Oct 5.
To characterize the multidetector CT (MDCT) imaging characteristics of mucinous tubular and spindle cell carcinoma (MTSCC) and collecting duct carcinoma (CDC) of the kidney.
21 patients with MTSCC and 18 patients with CDC were studied retrospectively. MDCT was undertaken to investigate differences in tumour characteristics.
Five patients with MTSCC had calcifications as did nine patients with CDC (p = 0.108). In three patients with MTSCC and four patients with CDC, the tumours had a clear boundary (p = 0.682). No patient with MTSCC had retroperitoneal lymph node metastasis as did five patients with CDC (p = 0.015). 16 patients with MTSCC showed homogeneous enhancement, whereas 11 patients with CDC showed heterogeneous enhancement (p = 0.025). The attenuation value of CDC tumours was greater than that of MTSCC and normal renal parenchyma on an unenhanced CT (p = 0.027). MTSCC and CDC tumour enhancement was less than the normal renal cortex and medulla in all phases (p < 0.001). Tumour enhancement was greater for CDC than that for MTSCC in all phases (p = 0.011, p = 0.006 and p = 0.052).
Unenhanced and dynamic MDCT may aid in diagnosis and differentiation of MTSCC and CDC of the kidney.
This is the first series evaluating the imaging findings of MTSCC and CDC of which we are aware, and identification of such findings may improve diagnosis of these two rare tumours.
描述肾黏液性小管状和梭形细胞癌（MTSCC）及集合管癌（CDC）的多排螺旋CT（MDCT）影像特征。
回顾性研究21例MTSCC患者和18例CDC患者。采用MDCT研究肿瘤特征的差异。
5例MTSCC患者和9例CDC患者有钙化（p = 0.108）。3例MTSCC患者和4例CDC患者的肿瘤边界清晰（p = 0.682）。MTSCC患者均无腹膜后淋巴结转移，而5例CDC患者有腹膜后淋巴结转移（p = 0.015）。16例MTSCC患者表现为均匀强化，而11例CDC患者表现为不均匀强化（p = 0.025）。在未增强CT上，CDC肿瘤的衰减值高于MTSCC和正常肾实质（p = 0.027）。在所有期相，MTSCC和CDC肿瘤的强化均低于正常肾皮质和髓质（p < 0.001）。在所有期相，CDC肿瘤的强化均高于MTSCC（p = 0.011、p = 0.006和p = 0.052）。
未增强及动态MDCT有助于肾MTSCC和CDC的诊断及鉴别诊断。
这是我们所知的首个评估MTSCC和CDC影像表现的系列研究，识别这些表现可能会改善这两种罕见肿瘤的诊断。
