A curved skin incision is made 1 cm below the palpable tip of scapula extending from midaxillary line to paravertebral line
. Latissimus dorsi was divided posteriorly and the fascia lying just posterior to posterior margin of serratus was divided anteriorly.
If needed, the scan was continued in supine, oblique, and lateral decubitus positions by moving the probe transversally and longitudinally along the intercostal spaces, including the parasternal line; middle- and lateral clavicular lines; anterior, middle, and posterior axillary lines; lateral and medical scapular lines; and along the paravertebral line
to cover the entire thoracic region including normal areas.
The color pattern consists of a paravertebral line
of pale color disappearing in the nape area, surrounded by a pair of dark paravertebral lines
which diverge in the neck and prolong to the temporal region passing through the eye and to the rostral scale; a pair of dark lateral lines are evident along their body, these do not touch the dark paravertebral lines
and disappear converging in the neck region.