PMC6901919_01
(A) Ultrasonographic image showing a solid mass above the bladder invading the bladder wall and with an irregular shape and uneven internal echogenicity. (B,C) Patchy calcification within the mass (red arrow). (D) Color-flow Doppler image showing patchy and short-line blood flow signals within the mass.
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F1
We diagnosed an umbilical tumor (Figure 1).
(A-C) Computed tomographic images showing a cystic solid mass (yellow arrow) in the anterior part of the bladder measuring 6.8 x 3.9 cm in size. The tumor invades the anterior wall and peritoneum of the adjacent bladder. Calcification (red arrow) and separation (yellow arrow) are visible within the tumor. (D) Enhanced computed tomographic image showing that the solid part of the mass is obviously enhanced (yellow arrow).
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F2
CT was also umbilical tumor. CT confirmed that there was an intra-abdominal mass with calcification, invasion of the adjacent bladder dome and peritoneum, and which underwent significant enhancement (Figure 2).
(A) Gross pathology showing the resected umbilical urethral tumor specimen. The swollen tumor material was brittle and adhered to the bladder wall. The cut surface was grayish white and covered with a jelly-like substance, and part of the bladder mucosa was visible. (B) Microscopic pathology (hematoxylin and eosin staining x40) confirming urachal cancer (grade II mucinous adenocarcinoma) with calcification and cancer tissue infiltration into the bladder wall muscle layer.
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F3
Histopathology of the tumor showed that part of the bladder mucosa was included in the tumor, without vascular and neurological invasion recidivism (Figure 3A). According to the Mayo staging system, the pathological diagnosis was urachal carcinoma (grade II mucinous adenocarcinoma) with calcification (Figure 3B).