Diagnostic ultrasound ( PDFDrive )

C
A B C
M
FIG. 49.28 Sacrococcygeal Teratoma. A 3-day-old infant girl with “fullness” in the buttocks. (A) Sagittal view shows a complex mass
immediately anterior to the cartilaginous coccyx. Portions of the mass are cystic (C). (B) More distal view reveals the tip of the coccyx (curved
arrow). The large mass extended even below the end of the coccyx (straight arrows). (C) Extended–ield-of-view image gives another sense of
the relative size of the mass (M) compared with the rest of the spine (arrow, end of coccyx), but the contour of the skin of the buttocks was not
distorted.
M
S
A B C
FIG. 49.29 Intrapelvic Sacrococcygeal Teratoma. A 3-year-old girl with bladder outlet obstruction. (A) Sagittal ultrasound view of the pelvis
shows a complex cystic mass (M) that might have been mistaken for the urinary bladder. The mass was compressed immediately against the
anterior wall of the sacrum (S). (B) Reconstructed sagittal and (C) direct axial computed tomography views reveal the mass (M) and the distended
urinary bladder (B). High-intensity material is barium within the anteriorly displaced rectum (curved arrow).
M
C
M
A B C
FIG. 49.30 Cystic Sacrococcygeal Teratoma. (A) Fetus at 25 weeks’ gestation. The distal end of the calciied spine (black arrow) and the
cystic portion of the mass (M) are demonstrated. (B) Postnatal ultrasound. The mass (M) is positioned immediately anterior to the coccyx (C) and
immediately posterior to the posterior wall of the rectum (arrows). A large portion of the mass was external, and a small tongue of the tumor
extended into a presacral, retrorectal position. (C) Normal infant, sagittal view, shows air within the rectum (arrow), which hugs the anterior aspect
of the coccyx.