Biomedical subjects
K Shamsi
Publications and source records attributed to K Shamsi.
Bilateral primary synchronous renal cell carcinoma.
We report a case of bilateral primary "synchronous" renal cell carcinoma (RCC) with different differentiation rates. Computed tomography (CT), ultrasonography (US), angiography, and fine needle aspiration biopsy (FNAB) were performed followed by right radical and left partial nephrectomy. Findings on ultrasonography were non-specific, CT scan showed bilateral solid renal mass. On angiography of the right renal artery no tumoral vessels were seen and FNAB yielded a false negative result on the left side. Histological examination revealed a cystic renal cell carcinoma on the right and a multinodular renal cell carcinoma on the left side. We could not find similar report in the current literature.
Crohn's disease and sclerosing cholangitis: CT and PTC diagnosis, with MR findings.
Computed tomography (CT), percutaneous transhepatic cholangiography (PTC) and magnetic resonance imaging (MRI) findings in a case of sclerosing cholangitis associated with Crohn's disease of the colon and terminal ileum are described. CT gives additional information on dilatation of peripheral bile ducts and confirms findings of PTC, i.e. a decreased arborization of the biliary tree, a nodular appearance of the common bile duct and multifocal bile duct strictures. CT findings could be recognized on MRI which provided no additional information.
Findings of focal hepatic lymphoma on Gd-DOTA enhanced dynamic FLASH MR imaging.
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Is it a haemangioma?
A retrospective study of 92 cases of proven haemangiomas is presented. In this study, we evaluated the degree of confidence of the radiologist in differentiating haemangioma by ultrasound (US), computed tomography (CT), angiography (AR), and magnetic resonance imaging (MRI) in an incidental and an oncologic (high risk) population. The diagnosis of haemangioma was confirmed by surgery, by fine needle aspiration biopsy (FNAB) and by long follow-up. Maximum lesions were diagnosed with high confidence by MRI (88-93%) and by angiography (85-91%) in both incidental and oncologic group. 44% of the lesions were confidently diagnosed in incidental group as compared to the 11% of the lesions in oncologic group by ultrasound. Similarly, lesions were diagnosed with maximum confidence in 76% in incidental group as compared to 48% in oncologic group by dynamic contrast bolus CT. Confidence was also evaluated according to the size of the lesions but due to the low number of lesions in < 1.5 cm category, the difference in the confidence levels was not apparent. We conclude that in high risk group, MRI, if available, should be directly performed after US. In the incidental finding group, if the lesion has typical features, US follow-up every 6 months is sufficient.
Mucinous cystadenocarcinoma of the pancreas with liver metastases. An unusual presentation of a rare tumor.
We present a case of mucinous cystadenocarcinoma of the pancreas with liver metastases. Initially, the patient presented as pancreatitis and pseudocyst which was marsupialised into the stomach in 1983. Eight years later, a tumor with liver metastases was detected. The liver metastases mimicked multiple abscesses. Over a period of forty-four days, CT features changed considerably and there was explosive enlargement of the lesions in the postoperative period. The reason for this dramatic increase in size was the anaplastic component of the tumor. To our knowledge, no such case has been reported in literature.