Primary Rectal Malignant Melanoma with Rapid Progression after Complete Resection

Kyeong Ok Kim; Byung Ik Jang; Jae Hwang Kim; Young Kyung Bae

doi:10.4166/kjg.2010.55.3.151

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Kim, Jang, Kim, and Bae: Primary Rectal Malignant Melanoma with Rapid Progression after Complete Resection

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Korean J Gastroenterol 2010;55(3):151-153.

Published online: 21 February 2010

DOI: https://doi.org/10.4166/kjg.2010.55.3.151

Primary Rectal Malignant Melanoma with Rapid Progression after Complete Resection

Kyeong Ok Kim, M.D.^∗, Byung Ik Jang, M.D., Ph.D.^∗,, Jae Hwang Kim, M.D., Ph.D.^†, Young Kyung Bae, M.D., Ph.D.^‡

^∗Division of Gastroenterology, Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea

^†Division of Gastroenterology, Department of Surgery, Yeungnam University College of Medicine, Daegu, Korea

^‡Division of Gastroenterology, Department of Pathology, Yeungnam University College of Medicine, Daegu, Korea

Correspondence to: Byung Ik Jang, M.D. Division of Gastroenterology, Department of Internal Medicine, Yeungnam University College of Medicine, 317-1, Daemyeong 5-dong, Nam-gu, Daegu 705-717, Korea Tel: +82-53-620-3830, Fax: +82-53-654-8386 E-mail: jbi@med.yu.ac.kr

REFERENCES

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Fig. 1.

Endoscopic finding of the polypoid mass. There was about 3 cm sized fungating mass at the rectum. At the top of the mass, slightly black colored base was noted.

Fig. 2.

Preoperative radiologic findings. (A) At the rectum, about 3 cm sized fungating mass was noted. (B) There was one hepatic cyst, but no metastasis.

Fig. 3.

Histologic findings after surgical resection. The tumor cells were spindle-shaped and formed fascicles at the upper portion of the polypoid mass (H&E, ×100). The tumor cells showed focal immunoreactivity for S-100 and HMB-45, which represented melanocytic differentiation (×100).

Fig. 4.

Follow-up CT of 7 months after surgical resection. (A) There were multiple soft tissue masses with ascites at the pelvic cavity and residual perirectal space. (B) Intractable metastatic masses at both lobes of the liver were noted.

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