PMC5056536_01
Clinical photograph showing a swelling (white arrow) over the left anterior chest wall.
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At physical examination, there was a soft, non-tender, ovoid, sessile, non-pulsatile, subcutaneous swelling measuring 4.5x3.0 cms approximately over the left anterior chest wall, around 2.5 cms inferior to the medial end of the left clavicle (Figure 1).
Gray scale ultrasound image of the swelling in a longitudinal section showing a well-defined, thin-walled cyst (white, filled arrows) with an eccentric, echogenic focus (white, unfilled arrow) in the subcutaneous plane. The hypoechoic area surrounding this cyst shows significant exudative fluid collection (asterix) with diffuse, floating echoes and few floating, echogenic foci. The adjacent soft tissues appear thickened and irregular, suggestive of edema (black arrows). The underlying rib is denoted as 'R' in the image.
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Ultrasound showed a 9x8-mm, well-defined, thin-walled, cystic lesion with an eccentric, echogenic focus measuring around 1.5 mm in diameter in the subcutaneous plane (Figure 2).
Gray scale ultrasound image of the swelling in a longitudinal section showing change of position of the echogenic focus (white, unfilled arrow) within the cyst on change of the posture of the patient. The surrounding exudative collection (asterix) shows diffuse, floating echoes and thin, incomplete internal septations (white, filled arrows) with few floating, echogenic foci.
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However, the echogenic focus did not cast any distal acoustic shadowing (Figure 3).