en Medical Physics Medical Physics مطالعه موردي Case Report <div style="text-align: justify;">The treatment results of intensity-modulated stereotactic radiotherapy (IM-SRT) by volumetric-modulated arc therapy (VMAT) for intramedullary cervical spinal cord metastases (IMCSCM) in two cases were presented. Case 1: A 76-year-old woman showed left-sided motor weakness and left arm pain and dysesthesia due to IMCSCM at C [cervical] 6-7 (located a little to the left laterally) with multiple small brain metastases from thyroid carcinoma.&nbsp; Multiple brain metastases were successfully treated by stereotactic radiosurgery (SRS). In addition, IMCSCM was treated by IM-SRT. Case 2: A 48-year-old man presented with asymptomatic IMCSCM at C2 (located a little to the right laterally) after conventional whole brain radiotherapy (WBRT) and multiple sessions of SRS/SRT for multiple brain metastases from lung adenocarcinoma. IMCSCM was treated by IM-SRT. In both cases 39 Gy in 13 fractions (without PTV [planning target volume] margin, D95%=95% dose) was delivered to the IMCSCM (0.3 ml and 0.5 ml in volume respectively) by coplanar 2-full circular arc VMAT. The maximum dose to the tumor was 46.3 Gy in case 1 and 47.1 Gy in case 2. IMCSCM in both cases shrank markedly without adverse effects during the follow-up period of 32 months and 8 months respectively. The symptoms of the extremities in case 1 were subsided completely until the patient&rsquo;s death at 34 months after SRT from lung metastasis. In case 1 IMCSCM had been thought to be a relatively radioresistant thyroid carcinoma metastasis. In case 2 IMCSCM was near the field of the prior WBRT. However, both tumors were successfully treated without adverse effects by VMAT IM-SRT.</div> Metastasis, spinal cord, intramedullary, cervical, volumetric-modulated arc therapy.  599 604 http://ijrr.com/browse.php?a_code=A-10-2055-43&slc_lang=en&sid=1 Y. Mori yoshim@aichi-med-u.ac.jp 7900319475328460016202 7900319475328460016202 Yes Department of Radiology and Radiation Oncology, Aichi Medical University, Nagakute, Aichi, Japan T. Mori 7900319475328460016203 7900319475328460016203 No Department of Radiology and Radiation Oncology, Aichi Medical University, Nagakute, Aichi, Japan K. Adachi 7900319475328460016204 7900319475328460016204 No Department of Radiology and Radiation Oncology, Aichi Medical University, Nagakute, Aichi, Japan S. Abe 7900319475328460016205 7900319475328460016205 No Department of Radiology and Radiation Oncology, Aichi Medical University, Nagakute, Aichi, Japan Y. Oshima 7900319475328460016206 7900319475328460016206 No Department of Radiology and Radiation Oncology, Aichi Medical University, Nagakute, Aichi, Japan A. Takeuchi 7900319475328460016207 7900319475328460016207 No Department of Radiology and Radiation Oncology, Aichi Medical University, Nagakute, Aichi, Japan M. Ito 7900319475328460016208 7900319475328460016208 No Department of Radiology and Radiation Oncology, Aichi Medical University, Nagakute, Aichi, Japan