Biomedical subjects
Publications and source records attributed to S R Prasad.
69 serum pairs from two common-source water-borne outbreaks and one series of endemic cases of hepatitis in three parts of India were tested for hepatitis A and hepatitis B virus infections. None of the patients had evidence of HAV infection and only 10.1% had evidence of HBV infection. A large proportion of hepatitis in India seems to be caused by previously unrecognised agents.
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Thorotrast, a contrast medium used extensively before being banned in 1950s, delivers a densely ionizing, high linear energy transfer type of radiation that predisposes to malignancies. We report a case of peripheral cholangiocarcinoma and describe its computed tomographic and magnetic resonance imaging features in a patient who developed it 48 years after exposure to Thorotrast.
Intraductal papillary mucinous tumor (IPMT) is an uncommon pancreatic neoplasm with characteristic histology and distinctive clinicobiologic behavior. It is characterized by proliferation of ductal epithelium associated with ductal dilatation and variable mucin production. Due to indolent nature of these tumors, IPMTs are frequently missed or misdiagnosed. Prompt recognition and differentiation from other tumors are essential because IPMT has a better prognosis than other pancreatic malignancies. The purpose of this article is to display the radiologic spectrum of IPMT.
Mycotic internal mammary artery (IMA) pseudoaneurysms are sparsely reported in medical literature. We report imaging findings of IMA pseudoaneurysms secondary to chest wall abscesses (staphylococcal and tuberculous) in two children. Both children were successfully treated by endovascular method thus obviating the need for surgery.
The hypothesis presented envisages dengue virus infection in a host with preexisting parasitic infection. The dual infections may produce alterations in the immunoregulatory system that would lead to depletion of T suppressor cells. The resultant augmented production of IgG and IgE may be responsible for type III and type I hypersensitivity reactions, respectively.
Magnetic resonance cholangiopancreatography (MRCP) is a novel imaging technique used for noninvasive work-up of patients with pancreaticobiliary disease. Magnetic resonance cholangiopancreatography is useful in the evaluation of a host of pancreaticobiliary disorders, such as congenital disorders, calculus disease, biliary strictures, sclerosing cholangitis, chronic pancreatitis, and cystic pancreatic lesions. It not only provides useful preoperative information to surgeons and gastroenterologists but also serves as a valuable tool in the assessment of postoperative pancreaticobiliary ductal anatomy. Recent refinement of techniques allows faster imaging with superior image resolution. This review summarizes the role of MRCP in clinical practice.