J Korean Bone Joint Tumor Soc.  2012 Jun;18(1):28-31. 10.5292/jkbjts.2012.18.1.28.

Intramuscular Baker's Cyst in Plantaris: A Case Report

Affiliations
  • 1Department of Orthopaedic Surgery, Hanil General Hospital, Seoul, Korea.
  • 2Department of Orthopaedic Surgery, Hanyang University College of Medicine, Seoul, Korea. kimts@hanyang.ac.kr

Abstract

Baker's cyst is found as most frequent cystic mass around the knee occurring between medial head of gastrocnemius muscle and semimembranosus muscle. The proximal or posterolateral extension of the cyst had been rarely reported and the cyst into the surrounding muscular tissue extremely rare. Intramuscular Baker's cyst that we report was found between lateral head of gastrocnemius muscle and popliteus tendon, and then extended into the plantaris muscle. With review of the literature, we here report a very rare case of plantaris muscular extension of Baker's cyst.

Keyword

plantaris muscle; Baker's cyst

MeSH Terms

Head
Knee
Muscle, Skeletal
Muscles
Popliteal Cyst
Tendons

Figure

  • Figure 1 Multiseptated cystic mass (arrow) between lateral head of gastrocnemius and popliteus was seen with high intensity signal in the sagittal T2 weighted scan (A, B) and axial T2 weighted scan (C).

  • Figure 2 Infiltration of cystic mass was found along the plantaris.

  • Figure 3 Plantaris was detached from its origin, and tenotomy was done at mid leg level for total removal.

  • Figure 4 Microscopic finding (×100) of the cyst with H&E stain shows with plantaris muscle fibers (A). On high power field (×400), the synovial lining (arrow) in the cyst wall was seen (B).


Reference

1. Miller TT, Staron RB, Koenigsberg T, Levin TL, Feldman F. MR imaging of Baker cysts: association with internal derangement, effusion, and degenerative arthropathy. Radiology. 1996. 201:247–250.
2. Fielding JR, Franklin PD, Kustan J. Popliteal cysts: a reassessment using magnetic resonance imaging. Skeletal Radiol. 1991. 20:433–435.
3. Jensen KH, Jørgensen U. Lateral presentation of a Baker's cyst. Clin Orthop Relat Res. 1993. (287):202–203.
4. Rubman MH, Schultz E, Sallis JG. Proximal dissection of a popliteal giant synovial cyst: a case report. Am J Orthop (Belle Mead NJ). 1997. 26:33–36.
5. Fang CS, McCarthy CL, McNally EG. Intramuscular dissection of Baker's cysts: report on three cases. Skeletal Radiol. 2004. 33:367–371.
6. Rauschning W. Popliteal cysts and their relation to the gastrocnemio-semimembranosus bursa Studies on the surgical and functional anatomy. Acta Orthop Scand Suppl. 1979. 179:1–43.
7. Lindgren PG, Willén R. Gastrocnemio-semimembranosus bursa and its relation to the knee joint I Anatomy and histology. Acta Radiol Diagn (Stockh). 1977. 18:497–512.
8. Burk DL Jr, Dalinka MK, Kanal E, et al. Meniscal and ganglion cysts of the knee: MR evaluation. AJR Am J Roentgenol. 1988. 150:331–336.
9. Steiner E, Steinbach LS, Schnarkowski P, Tirman PF, Genant HK. Ganglia and cysts around joints. Radiol Clin North Am. 1996. 34:395–425.
10. Fritschy D, Fasel J, Imbert JC, Bianchi S, Verdonk R, Wirth CJ. The popliteal cyst. Knee Surg Sports Traumatol Arthrosc. 2006. 14:623–628.
Full Text Links
  • JKBJTS
Actions
Cited
CITED
export Copy
Close
Share
  • Twitter
  • Facebook
Similar articles
Copyright © 2024 by Korean Association of Medical Journal Editors. All rights reserved.     E-mail: koreamed@kamje.or.kr