Abstract
Background
Variations in the lower extremity musculature have been identified, including an anomalous origin of the medial head of the gastrocnemius muscle. Anomalies of the lateral head of the gastrocnemius muscle (LGN) have been less frequently described, especially in children.
Objective
To describe the MR imaging appearance, frequency and clinical symptoms associated with anatomic variations of the LGN in children and young adults.
Materials and methods
A retrospective review of 465 knee MR imaging examinations was performed. The site of origin of the LGN was identified as either normal, lateral segmental anomalous origin (LSAO), or medial accessory anomalous origin (MAAO). The clinical indication for imaging was recorded.
Results
An anatomic variation of the LGN was identified in 16 patients (3.4%). Nine patients had LSAO, and five of these had symptoms referable to or abnormalities of the patella. Seven patients had MAAO, and three of these had chronic nontraumatic knee pain.
Conclusion
Anatomic variations of the LGN are not rare in young patients, occurring with a frequency of 3.4% in our series. It is unknown whether these anomalies play a role in the etiology of patellofemoral pain or unexplained joint pain in children.
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References
Duc SR, Wentz KU, Kach KP et al (2004) First report of an accessory popliteal muscle: detection with MRI. Skeletal Radiol 33:429–431
Stilo A, Tamburrini S, Santagada N et al (2003) Accessory soleus muscle: US and MR findings. Radiol Med (Torino) 106:126–129
Cheung Y, Rosenberg ZS (2001) MR imaging of the accessory muscles around the ankle. Magn Reson Imaging Clin N Am 9:465–473
Assoun J, Railhac JJ, Richardi G et al (1995) CT and MR of accessory soleus muscle. J Comput Assist Tomogr 19:333–335
Yu JS, Resnick D (1994) MR imaging of the accessory soleus muscle appearance in six patients and a review of the literature. Skeletal Radiol 23:525–528
Ekstrom JE, Shuman WP, Mack LA (1990) MR imaging of accessory soleus muscle. J Comput Assist Tomogr 14:239–242
Macedo TA, Johnson CM, Hallett JW Jr et al (2003) Popliteal artery entrapment syndrome: role of imaging in the diagnosis. AJR 181:1259–1265
Levien LJ (2003) Popliteal artery entrapment syndrome. Semin Vasc Surg 16:223–231
Atilla S, Ilgit ET, Akpek S et al (1998) MR imaging and MR angiography in popliteal artery entrapment syndrome. Eur Radiol 8:1025–1029
Kim HK, Shin MJ, Kim SM et al (2006) Popliteal artery entrapment syndrome: morphological classification utilizing MR imaging. Skeletal Radiol 35:648–658
Gray H (2000) The muscle and fasciae of the lower extremity. In: Gray H (ed) Anatomy of the human body, 20th edn. Lea & Febiger, Philadelphia, PA, pp 1236–1245
Bergman RA, Walker CW, el-Khour GY (1995) The third head of gastrocnemius in CT images. Ann Anat 177:291–294
Haidar S, Thomas K, Miller S (2005) Popliteal artery entrapment syndrome in a young girl. Pediatr Radiol 35:440–443
Chan CW, Wilson JI, Myatt A et al (2000) Painful leg and missing pulses: a case report. Arch Dis Child 83:362–363
LaBella C (2004) Patellofemoral pain syndrome: evaluation and treatment. Prim Care 31:977–1003
Devereaux MD, Lachmann SM (1984) Patello-femoral arthralgia in athletes attending a sports injury clinic. Br J Sports Med 18:18–21
Christian SR, Anderson MB, Workman R et al (2006) Imaging of anterior knee pain. Clin Sports Med 25:681–702
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Kim, H.K., Laor, T. & Racadio, J.M. MR imaging assessment of the lateral head of the gastrocnemius muscle: prevalence of segmental anomalous origins in children and young adults. Pediatr Radiol 38, 1300–1305 (2008). https://doi.org/10.1007/s00247-008-1018-3
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DOI: https://doi.org/10.1007/s00247-008-1018-3