PMC6744782_01
Preoperative magnetic resonance imaging showing a 35-mm sized mass in the left cerebellum that showed low intensity on T1-weighted image (left), high intensity with perifocal oedema on T2-weighted image (middle), and heterogeneous enhancement on T1-weighted image with gadolinium administration (right).
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F1
T1-weighted images, high intensity with perifocal edema on T2-weighted images, and avid heterogeneous enhancement on T1-weighted images after gadolinium administration [Figure 1]. The differential diagnosis included metastasis, glioma, and abscess.
Tumour containing proliferating signet ring cells floating in abundant mucin.
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F2
The excised specimen was pathologically diagnosed as mucinous adenocarcinoma consisting mainly of proliferating signet ring cells, which was identical to the features seen in the primary urachal adenocarcinoma comprised a mixture of signet ring cells, mucus-producing cells, and duct-forming cells [Figure 2].