Submandibular gland carcinoma ex pleomorphic adenoma with calcification.

IF 1.6 3区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Oral Radiology Pub Date : 2024-04-01 Epub Date: 2023-11-30 DOI:10.1007/s11282-023-00724-4

Tomoko Shiraishi, Toru Chikui, Shoko Yoshida, Kazuhiko Okamura, Kenichiro Hashimoto, Tomoko Fukui, Toyohiro Kagawa

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Abstract

We report an unusual case of carcinoma ex pleomorphic adenoma (CXPA) in the submandibular gland. The mass had a unique calcification. Panoramic tomography revealed sponge-like calcification. The central portion displayed heterogeneous high signal intensity on T1-weighted image (T1WI) and T2-weighted image (T2WI), and heterogeneously moderate signal intensity on a short-TI inversion recovery (STIR) image. The ADC was low (0.78 × 10^-3mm²/sec). After surgical excision, a pathological examination revealed that the mass contained CXPA as a minor component. Tumor cells with large hyperchromatic nuclei and eosinophilic or clear cytoplasm proliferated in irregular small tubule formations or cribriform or Roman-bridge structures in hyalinized or focally ossified stroma. The entire mass was calcified, particularly in the central region. Taken together, the reduced T1 relaxation times were related to the surface effects of diamagnetic particles, which were observed at calcium particle concentrations of up to 30%. We report a CXPA with unusual sponge-like calcification, which appeared unusually hyperintense on T1WI due to a surface effect.

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伴有钙化的颌下腺癌多形性腺瘤。

我们报告一例罕见的颌下腺癌外多形性腺瘤(CXPA)。肿块有独特的钙化。全景断层扫描显示海绵状钙化。中心部分在t1和t2加权图像(T2WI)上表现为非均匀的高信号强度，在短ti反演恢复(STIR)图像上表现为非均匀的中等信号强度。ADC较低(0.78 × 10-3mm2/sec)。手术切除后，病理检查显示肿块中含有少量的CXPA。在透明化或局灶骨化的间质中，具有大的高染核和嗜酸性或透明细胞质的肿瘤细胞以不规则的小管状或筛网状或罗马桥状结构增殖。整个肿块钙化，特别是在中心区域。综上所述，T1弛豫时间的减少与抗磁性颗粒的表面效应有关，这种效应在钙颗粒浓度高达30%时观察到。我们报告一个异常海绵状钙化的CXPA，由于表面效应，在T1WI上表现出异常的高强度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Oral Radiology DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

4.20

自引率

13.60%

发文量

审稿时长

>12 weeks

期刊介绍： As the official English-language journal of the Japanese Society for Oral and Maxillofacial Radiology and the Asian Academy of Oral and Maxillofacial Radiology, Oral Radiology is intended to be a forum for international collaboration in head and neck diagnostic imaging and all related fields. Oral Radiology features cutting-edge research papers, review articles, case reports, and technical notes from both the clinical and experimental fields. As membership in the Society is not a prerequisite, contributions are welcome from researchers and clinicians worldwide.