PMC2698106_01
A 26-week-old female fetus with an extensive lymphangioma.. A. Prenatal ultrasonography shows a large multiseptated cystic mass (arrows) with variable echo patterns, located at the right of the fetal abdomen and also involving the right lower extremity (open arrows). The transverse diameter of this extremity is much greater than that of the left one (L). Color Doppler ultrasonography revealed no flow within the mass at the time of examination (not shown).. B. Sagittal T2-weighted single-shot fast spin-echo MR image (TR/TE, 1624/79) depicts a large intra-abdominal high-signal-intensity mass (arrows) with multiple internal locules, displacing the ipsilateral kidney (K) superiorly. The mass (arrows) extends continuously to the right buttock and right lower extremity.. C. Coronal T2-weighted single-shot fast spin-echo MR image (TR/TE, 1624/79) clearly reveals the multilocular cystic nature of the mass (arrows), each locule of which contains multiple fluid-fluid levels. S=Stomach.. D. T2-weighted single-shot fast spin-echo MR image (TR/TE, 1624/79) obtained parallel to the right lower fetal extremity shows the distal extent of the lymphangioma (arrows). This presents as an extensive subcutaneous cystic mass, with asymmetric limb hypertrophy.. E. Post-mortem photograph depicts a large lymphangioma (arrows) at the right of the abdomen, extending to the right lower extremity.
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F1
Detailed sonography revealed the presence of a large, multiseptated cystic mass at the right side of the abdomen, extending to the right buttock and lower extremity, the transverse diameter of which was much larger than that of the left (Fig. 1A). T2-weighted single-shot fast spin-echo MR images (TR/TE, 1624/79; bandwidth, 31.2 kHz; field of view, 22x22 cm; matrix, 224x192; slice thickness, 5 mm; intersection gap, 0 mm; number of excitations, 0.56) were obtained in the axial, coronal, and sagittal planes; the acquisition time for each was less than 1 second. The images revealed a large, multilocular, high-signal mass in the right-side of the abdomen; displacement of the ipsilateral kidney superiorly and bowel loops to the left was noted (Figs. 1B, C). Within the mass, which extended continuously to the right buttock and right lower extremity, presenting as an extensive subcutaneous cystic mass and causing asymmetric limb hypertrophy, multiple fluid-fluid levels were noted (Figs. 1C, D). A large, multilocular cystic mass, containing thin-walled cysts of both clear and hemorrhagic fluid, occupied the right side of the retroperitoneum (Fig. 1E), infiltrating the adipose and muscular tissues of the buttock through the retroperitoneal space and extending to the right lower extremity.