Deep Submuscular Parosteal Angiomyxolipoma in a Child

Hong Kyun Kim; Jeong Han Yoo; Yong Wook Park; Jin Soo Park; Kyu Cheol Rowe; Kuk Jin Chung; Keun Jong Chang; Ji Hyo Hwang

doi:10.5292/jkbjts.2010.16.1.42

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Kim, Yoo, Park, Park, Rowe, Chung, Chang, and Hwang: Deep Submuscular Parosteal Angiomyxolipoma in a Child

Case Report

J Korean Bone Joint Tumor Soc 2010;16(1):42-46.

Published online: 17 December 2010

DOI: https://doi.org/10.5292/jkbjts.2010.16.1.42

Deep Submuscular Parosteal Angiomyxolipoma in a Child

Hong Kyun Kim, M.D., Jeong Han Yoo, M.D., Yong Wook Park, M.D., Jin Soo Park, M.D., Kyu Cheol Rowe, M.D., Kuk Jin Chung, M.D., Keun Jong Chang, M.D., Ji Hyo Hwang, M.D.

Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Korea

Correspondence to: Ji Hyo Hwang, M.D. Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, Hallym University, College of Medicine, 948-1, Daerim-dong, Yeongdeungpo-gu, Seoul 150-950, Korea TEL: +82-2-829-5165 FAX: +82-2-834-1728 E-mail: dr73@hallym.or.kr

Received 1 May 201030 May 2010 Accepted 11 June 2010

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Angiomyxolipoma is a rare variant of lipoma, which is described by Mai, 1996, at first. The nine cases of which have been reported to date. Microscopically, the lesion consists of adipose tissue with the paucicellular myxoid areas and fat tissue with numerous thin, dilated, and congestive blood vessels. The reported cases mostly located to the superficial layer on the scalp, subungual, extremities in adults. We report one case of angiomyxolipoma located in the submuscular and parosteal area in the distal femur around knee joint in a child.

Keywords: submuscular, angimyxolipoma, child

REFERENCES

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Figure 1.

Plain x-ray shows mild soft tissue density swelling on the medial side of the supracondyle around knee (A). Sonograph reveals fusiform anisoechogenecity in the suprapatellar pouch area (B).

Figure 2.

T1WI shows high signal intensity in the subvastus area not invaded surrounructures (A). T2WI on the sagittal view shows low signal septations and band-like lesions around the suprapatellar pouch area (B). Fat suppression T1WI shows almost same intensity surround fat (C).

Figure 3.

We approached by direct incision of vastus medialis. The mass is located between the vastus medialis and perioeteum where the mass was relatively firm attached. The distal pole of mass is conneted with suprapatellar pouch.

Figure 4.

The gross specimen was measured by 8.5×6.5×3.5 cm and the capsulation was not definite and surrounding muscle component was mixed (A). The cross sectional surface showed multiple focal nodular lesion (B).

Figure 5.

Well-demarcated mass composed of paucicellular myxoid tissue and fat tissue with numerous thin, dilated, and congestive blood vessels (H&E, ×40) (A). Myxoid tissue with small nests of mature fat cells and many blood vessels (H&E, ×100) (B). Dendritic or spindle cells in the myxoid tissue (H&E, ×400) (C).

Figure 6.

Positive finding in CD34 immunohistochemical stain of dendritic cells in myxoid tissue (×400) (A). The spindle cells in the myxoid tissue show positive finding in vimentin immunohistochemical stain (×400) (B).

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