Shingo Kataoka

Intracranial Invasion of an Extramedullary Plasmacytoma in the Paranasal Sinus: A Case Report with a Reference to Magnetic Resonance Imaging

A case of extramedullary plasmacytoma arising from the paranasal sinus with intracranial invasion at recurrence is reported. In this case, magnetic resonance imaging was first employed not only to delineate tumor extension into the cranial space, but also to evaluate the therapeutic response. Histological confirmation was made after a biopsy was performed. Despite widespread tumor involvement of orbit in the cavernous sinus and anterior skull base, radiotherapy and subsequent maintenance chemotherapy with cisplatin and etoposide induced a long-term, 42-month partial remission. The pertinent clinical characteristics are reviewed in the literature and the therapeutic problems and prognostic factors are discussed with an introduction of advantage of magnetic resonance imaging.

Minute Thyroid Cancer with Mediastinal Metastasis; A Case Report.

A 58-year-old man complained of hoarseness. He was found to have left vocal cord palsy and a nodule in the left thyroid lobe. US of the thyroid revealed a round tumor with a definite regular boundary echo and an internal echo with a polycystic pattern. CT films showed a noninvasive mass in the left thyroid lobe and a mediastinal mass with a small calcification. No lesion was detected in the right thyroid lobe by US or CT.The preoperative diagnosis was a benign thyroid tumor and a mediastinal tumor. Histological examination showed a follicular adenoma of the left thyroid, a minute papillary carcinoma of the right thyroid and a papillary carcinoma in the mediastinum. The mediastinal tumor had invaded the left recurret nerve and was considered to be a metastasis from the minute carcinoma of the right thyroid lobe.