Chemotherapeutic alteration of small intestinal morphology and function: a progress report.

Nine patients with malignancy requiring chemotherapy were evaluated before, during, and in the recovery phase of their antineoplastic regimen with selected absorptive studies and jejunal biopsies. Depression of the crypt mitoses occurred without change in the indices of absorption. The mitotic indices returned to pretreatment counts on the recovery phase biopsies. Even after prolonged therapy, restudy in three of the patients failed to demonstrate clinical malabsorption. We conclude that chemotherapy-related malabsorption does not contribute to overall malnutrition of cancer patients during the first months of treatment.

Structure of the gastric mucosa in acute infectious bacterial gastroenteritis.

It is now well documented that a characteristic mucosal lesion of the proximal small intestine is present in acute nonbacterial gastroenteritis. To determine whether a gastric mucosal lesion also accompanies this illness, stool filtrate containing Norwalk agent was given orally to 15 volunteers after base line biopsies of gastric fundal and/or antral mucosa had been obtained. Gastric fundal and/or antral biopsies were then obtained serially between 24 and 168 hr after administration of the inoculum. Nine volunteers developed symptoms of gastroenteritis. gastric biopsies from those with normal base line fundal and/or antral biopsies remained normal during and after clinical illness. Those volunteers who had mild to moderate gastritis in their base line biopsies showed persistence but no progression of the lesion during illness. In 4 of the volunteers who became ill, intestinal biopsies were available and showed the typical gastroenteritis lesion. These results indicate that acute infectious nonbacterial gastroenteritis induced by Norwalk agent is not associated with histologically detectable gastric mucosal lesion.

Simultaneous gastric and plasma immunoreactive plasma carcinoembryonic antigen in 108 patients undergoing gastroscopy.

Simultaneous measurement of plasma and gastric immunoreactive carcinoembryonic antigen (CEA) was performed in 108 patients undergoing upper gastrointestinal endoscopy. Gastric immunoreactive CEA was more sensitive than plasma CEA (92% vs. 65% positive) in patients with gastric cancer. In cancer patients gastric CEA was significantly higher than in all other patient groups. The extent of disease, the histologic type of adenocarcinoma, and the macroscopic appearance of the tumor had no influence on gastric CEA results. Gastric CEA was elevated in 44% of patients with gastritis and 26% of patients with benign gastric ulcers, but was never elevated in patients with no gastric pathology. In patients with benign disorders, elevated gastric CEA was significantly correlated with atrophic gastritis especially of moderate or severe degrees. Elevated levels persisted in patients with pernicious anemia and severe atrophic gastritis but returned to normal with healing of benign gastric ulcers. Simultaneous measurement of gastric total protein or potassium content was necessary to correct for variations in sample collection. We conclude that gastric CEA was not useful for distinguishing between benign and malignant lesions but should be studied further for screening high risk patients, for identifying and following patients with "premalignant" conditions, and for following cancer patients before and after surgery and/or chemotherapy.

Gastrointestinal involvement in the Sézary syndrome.

A case of documented Sézary syndrome, a cutaneous T-cell lymphoma, with gastrointestinal lymphocytic infiltration is presented. The symptom of diarrhea waxed and waned with the course of the disease process. Radiographic studies were normal, and no evidence of malabsorption was elicited. The diagnosis was established by endoscopic and biopsy techniques, with light and electron microscopy of colonic and small bowel biopsies demonstrating extensive infiltration with typical Sézary cells. To our knowledge this is the first reported case of gastrointestinal involvement in the Sézary syndrome.

Jejunal adenylate cyclase activity in human subjects during viral gastroenteritis.

The histopathological changes that occur in the jejunal mucosa of humans infected with the Norwalk or Hawaii agent of acute infectious nonbacterial gastroenteritis ("viral" gastroenteritis) have ben well characterized. The pathogenesis of diarrhea in this syndrome remains unknown; however, recent reports have suggested a possible role for the adenylate cyclase system. In this combined paper, two groups of investigators working independently and employing slightly different techniques report that: (1) there is marked interindividual variation in the apparent specific activity of adenylate cyclase in human jejunal biopsy tissue; (2) such variation can be minimized by expressing enzyme activity as a fraction of maximal that can be stimulated by 10(-2) M sodium fluoride; and (3) adenylate cyclase activity in jejunal mucosa is not increased during diarrhea or illness in human viral gastroenteritis, therefore suggesting no role for the adenylate cyclase system in the pathogenesis of diarrhea in this common clinical entity.