Cerebrospinal fluid was negative for malignant cells.
Brushing cytology of the bile duct was negative for malignant tumor.
Percutaneous transhepatic biliary drainage was performed, but the cytology specimen was negative for malignant cells.
In spite all measures, the initial vitreous specimen was negative for malignant cells.
The proximal stump of the choledochus was negative for malignant cells.
If repeated cytology for effusions is negative for malignant cells, we might have a chance to achieve curative operation.
Due to the concern for recurrent leukemia or infection, aqueous humor was obtained from the left eye; cytology was negative for malignant cells, and cultures were negative.
It showed narrowing of the bilateral intrahepatic bile duct, though biopsy of the bile duct was negative for malignant tumor (Fig. 3a).
A few endoscopic biopsies of the duodenal mucosa and submucosa were performed, but a pathological examination of the specimens was negative for malignant cells and could not diagnose hyperplasia of Brunner's glands, too.
Duodenal endoscopy revealed multiple submucosal tumors in the first and the second portion of the duodenum, although a pathological examination of biopsied specimens obtained from the duodenal lesions was negative for malignant cells.
