Skull metastasis revealing a papillary thyroid carcinoma

Although thyroid carcinoma is a relatively common form of malignancy,metastatic spread to the skull is rare.Here,we report a case of papillary thyroid carcinoma with frontal and parietal metastasis.A 61-year-old Chinese woman presented with a one year history of a growing mass on the center of the frontal and parietal bone,initially thought to be meningioma.Biopsy of the skull base mass after intracalvarium excision,indicated a tumor of thyroid origin.One month later the patient underwent a total thyroidectomy.Pathological examination confirmed a diagnosis of papillary thyroid carcinoma with frontal and parietal bone metastasis.Based on this experience,the key to successful management of the skull metastasis of thyroid carcinoma is prompt diagnosis and appropriate treatment.Skull metastasis should be considered at the outset of the clinical course of papillary thyroid cancer.To facilitate this,patients should be meticulously investigated by a multidisciplinary team to improve quality of life.

介质粗糙面上介质体复合目标的3DMLUV-FIA算法建模

本文研究了任意3D介质目标在2D介质粗糙面上复合电磁散射特性的算法建模。结合PHCHW方程和矩量法,使用RWG基函数和伽略金将表面积分方程离散为矩阵方程,求解时,对EFIE(电场积分方程)用块对角作为预处理条件的BICGSTAB(稳定的双共轭梯度迭代)算法,对MFIE(磁场积分方程)直接用BICGSTAB算法。针对矩量法的高存储量及迭代过程中的存在的矩阵向量积耗时问题,结合快速互耦迭代方法(FIA),给出了三维多层UV并合FIA的组合算法建模,并且分别对介质体、介质粗糙面和体/面复合散射的双站RCS进行了数值模拟,通过对比矩量法和其他快速电磁算法并进行结果分析,可以看出在求解介质体散射问题时,3DMLUV-FIA算法具有明显优势,3DMLUV-FIA算法具有高效、稳定且准确的特点。