Soft outer hemispherical mass on the lateral side of the leg



The soft hemispherical mass on the lateral side of the leg is a mass on the anterolateral or lateral thigh of the calf. The mass of the mass is soft and hemispherical, which is a symptom of tendon.



Reasons for the soft hemispherical mass on the outside of the leg:

1. Myofascial defects or weak common myofascial defects or weak reasons are as follows:

(1) Under normal circumstances, the muscle fascia has a normal, physiological defect or weak area. When the muscle pressure is increased, the muscle will be exuded. For example, the superficial peroneal nerve is descended from the lateral side of the sacral neck to the long and short muscles of the humerus, and the terminal branch passes through the fascia at the junction of the lower third of the calf to become a cutaneous branch, resulting in a partial defect. Or weak, the calf tendon can be pulled out. Muscles through the fascial nerve exit can cause nerve damage to jam, which in turn causes a series of symptoms.

(2) Surgical injury or sharp cutting can cause muscle damage and rupture of the fascia. For example, when the debridement is sutured, only the skin is sutured. When the muscle is swollen and the pressure is increased, it can bulge out of the fascia. For example, a blunt injury or fracture can damage the muscles and puncture the fascia, and the tendon is bulged out of the fascia due to muscle swelling and increased pressure.

(3) strenuous exercise or strong physical labor, uncoordinated movement or excessive load, and incorrect posture of the ground, unstable limbs and other factors, so that the muscles of the lower limbs are extremely contracted, resulting in damage to the muscle structure. Shrinking, the epicardium is longitudinally torn, forming a gap, so that the muscle bulges from the epicardial space, and the invagination, a small amount of oozing, secondary edema, exudation and other traumatic inflammatory reactions and peripheral muscles .

(4) Long-term chronic injury makes the lower limb fascia weak or ruptured.

(5) The fascia itself causes a weak fascia in a certain part.

2. Increased muscle pressure

(1) After intense muscle exercise or excessive activity, local metabolism is enhanced, blood oxygen concentration decreases metabolite accumulation, microcirculation exudation increases, interstitial fluid increases, muscles may swell and hypertrophy; however, fascial wall limits hypertrophy The expansion of the muscles increases the pressure in the muscle compartment, which in turn causes the muscles to protrude from the weak or defective areas to form tendons.

(2) The wounds, surgery or muscles themselves can cause muscle swelling, increased pressure, and bulge from the weak or weak fascia to form tendons.

In recent years, it has been suggested that tendon is a compensatory manifestation of chronic myofascial compartment syndrome. Zhang Yufu et al also found that in the chronic calf muscle compartment syndrome, nearly half of the patients had tendon.


an examination

Related inspection

Detection of trace elements in human body by routine examination of blood, joints and soft tissues

Diagnosis of soft, semi-spherical masses on the lateral side of the leg:

1. Most patients have a history of trauma.

2. The anterior lateral part of the calf or the outer side of the thigh has a mass. The mass of the mass is soft and hemispherical, and the boundary has a certain elasticity. When the muscle contracts, it disappears and becomes small, and the oval and the sharp edge fascia defect can be touched.

3. Diagnostic puncture is negative.

4. Ultrasonography can assist in clinical diagnosis.


Differential diagnosis

Identification of soft, semi-spherical masses on the lateral side of the leg:

1. Varicose veins of lower extremities, multiple tendons of aneurysms need to be differentiated from varicose veins of the lower extremities, aneurysms, etc., and the varicose veins of the lower extremities are not related to trauma. The lower extremity masses become smaller or disappear, and the diagnostic puncture can identify the aneurysm with fluctuations. Can smell vascular noise.

2. Cold abscesses Cold abscess patients often have a history of tuberculosis with a sense of fluctuations can be identified.

3. The ganglion cyst occurs in the tendon and tendon sheath, and the muscle does not become smaller or disappear when it contracts.

4. The lipoma mass is subcutaneous, soft and lobulated, and the activity does not change with the muscle activity becoming smaller or disappearing.

5. Others need to be differentiated from muscle tears, tendon rupture hemangioma, etc.

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