J Korean Bone Joint Tumor Soc.  2012 Dec;18(2):89-93. 10.5292/jkbjts.2012.18.2.89.

Muscle Infarction and Calcification of the Semitendinosus Tendon: A Case Report

• Cho JH

• KMID: 1431676
• DOI: http://doi.org/10.5292/jkbjts.2012.18.2.89

Abstract

The most common anatomic location of calcific tendinitis is the suprasupinatus muscle of the shoulder joint. However, it is known to develop in any joint including the hip, knee. Infarction of skeletal muscle in the distal areas of the limbs due to vascular occlusion is a well recognized systemic condition in patients who have diabetes. The author experienced mass-like lesion combined muscle infarction and calcification within pure semitendinosus tendon without diabetes in posterosuperior area of distal thigh in old age.

Keyword

distal femur; semitendinosus tendon; muscle infarction; calcification

MeSH Terms

Extremities
Hip
Humans
Infarction
Joints
Knee
Muscle, Skeletal
Muscles
Shoulder Joint
Tendinopathy
Tendons
Thigh

Figure

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  Figure 1 Lateral radiograph of right knee show calcified lesion (arrow) on posterior area of distal femur.

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  Figure 2 Magnetic resonance images shows well-defined soft tissue mass along semitendinosus tendon, posterior aspect of distal thigh. (A) T1-weighed image: slightly high signal intensity (B) T2-weighed image: heterogeneous iso signal intensity.

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  Figure 3 Gross examination reveals tendon (right white portion) with skeletal muscles (left cut view).

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  Figure 4 Microscopic findings of tendinitis with muscle infarct. (A) Low power view reveals tendon (T) and skeletal muscle (M) (×40). (B) Degeneration with infract (arrows) was noted in muscle portion (×200, H&E). (C) Degeneration with calcification (arrows) was noted in tendon portion (×100, H&E). (D) Tendinitis with foreign body reaction (arrows).

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