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首页> 美国卫生研究院文献>Cancer Communications >A modified method for locating parapharyngeal space neoplasms on magnetic resonance images: implications for differential diagnosis
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A modified method for locating parapharyngeal space neoplasms on magnetic resonance images: implications for differential diagnosis

机译：在磁共振图像上定位咽旁空间肿瘤的改良方法：对鉴别诊断的意义

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The parapharyngeal space (PPS) is an inverted pyramid-shaped deep space in the head and neck region, and a variety of tumors, such as salivary gland tumors, neurogenic tumors, nasopharyngeal carcinomas with parapharyngeal invasion, and lymphomas, can be found in this space. The differential diagnosis of PPS tumors remains challenging for radiologists. This study aimed to develop and test a modified method for locating PPS tumors on magnetic resonance (MR) images to improve preoperative differential diagnosis. The new protocol divided the PPS into three compartments: a prestyloid compartment, the carotid sheath, and the areas outside the carotid sheath. PPS tumors were located in these compartments according to the displacements of the tensor veli palatini muscle and the styloid process, with or without blood vessel separations and medial pterygoid invasion. This protocol, as well as a more conventional protocol that is based on displacements of the internal carotid artery (ICA), was used to assess MR images captured from a series of 58 PPS tumors. The consequent distributions of PPS tumor locations determined by both methods were compared. Of all 58 tumors, our new method determined that 57 could be assigned to precise PPS compartments. Nearly all (13/14; 93%) tumors that were located in the pre-styloid compartment were salivary gland tumors. All 15 tumors within the carotid sheath were neurogenic tumors. The vast majority (18/20; 90%) of trans-spatial lesions were malignancies. However, according to the ICA-based method, 28 tumors were located in the pre-styloid compartment, and 24 were located in the post-styloid compartment, leaving 6 tumors that were difficult to locate. Lesions located in both the pre-styloid and the post-styloid compartments comprised various types of tumors. Compared with the conventional ICA-based method, our new method can help radiologists to narrow the differential diagnosis of PPS tumors to specific compartments.
机译：咽旁间隙（PPS）是头部和颈部区域的倒金字塔形深处空间，在此可以发现多种肿瘤，例如唾液腺肿瘤，神经源性肿瘤，鼻咽旁侵犯的鼻咽癌和淋巴瘤。空间。 PPS肿瘤的鉴别诊断对放射科医生仍然具有挑战性。这项研究旨在开发和测试一种改进的方法，用于在磁共振（MR）图像上定位PPS肿瘤，以改善术前鉴别诊断。新协议将PPS分为三个隔间：前茎隔，颈动脉鞘和颈动脉鞘之外的区域。根据张量veli palatini肌肉的位移和茎突，将PPS肿瘤定位在这些隔室中，有无血管分离和翼状肉内侧侵入。该协议以及基于颈内动脉（ICA）位移的更常规协议，用于评估从一系列58个PPS肿瘤中捕获的MR图像。比较了通过两种方法确定的PPS肿瘤位置的分布。在所有58种肿瘤中，我们的新方法确定了57种可以分配给精确的PPS隔室。茎突前区中几乎所有（13/14; 93％）的肿瘤都是唾液腺肿瘤。颈动脉鞘内的所有15种肿瘤均为神经源性肿瘤。跨空间病变的绝大多数（18/20； 90％）为恶性肿瘤。但是，根据基于ICA的方法，在茎突前区室中有28个肿瘤，在茎突后区室中有24个肿瘤，剩下6个难以定位的肿瘤。位于茎突前和茎突后室的病变均包含各种类型的肿瘤。与传统的基于ICA的方法相比，我们的新方法可以帮助放射科医生将PPS肿瘤的鉴别诊断范围缩小到特定区域。

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