Stomach

• vascular gastropathy
  10 November 2005

  vascular gastropathies
  Definition: Vascular gastropathies are anomalies of gastric mucosal vessels with little or no accompanying inflammation.
  Congestion, dilatation of capillaries and focal hemorrhages are commonly found in many biopsy specimens with H. pylori gastritis.
  It is therefore important for the pathologist to be able to distinguish these nonspecific changes of inflammation from primary vascular lesions that are not gastritides per se.
  These conditions are known as vascular (...)

• parasitic gastritis
  10 November 2005

  Images
  gastric anisakiasis
  http://www.nejm.org/doi/full/10.1056/NEJMicm1509451
  The stomach is not a preferred site for human parasitic infections. Cryptosporidium spp. has been found lining the gastric mucosa, which was virtually free of inflammation.
  Several cases of giardiasis have been reported, virtually all in stomachs with extensive atrophy and intestinal metaplasia.
  Because most patients also have H. pylori infection, it remains unclear whether Giardia intestinalis causes (...)

• fungal gastritis
  10 November 2005

  Candida species, Histoplasma capsulatum, and Mucoraceae have been found in the stomach of immunocompromised subjects, particularly AIDS patients, with disseminated infections.
  Endoscopically, gastric candidiasis appears as whitish patches scattered on the mucosa; microscopically, yeast forms are seen lying on and sometimes invading the eroded gastric mucosa.
  Hyphae of Candida sp. may be found at the base of a large portion of gastric ulcers, but they are believed to represent the (...)

• viral gastritis
  10 November 2005

  Although many common enteroviruses are believed to infect the gastric mucosa, so few patients with acute gastroenteritis undergo gastric biopsy that no information is available on the morphologic features of these infections.
  CMV gastritis
  The only viral infections of the stomach with a distinct pathologic appearance are those caused by cytomegalovirus (CMV); CMV-associated gastritis is seen almost exclusively in children and immunocompromised patients.
  Usually it is associated with (...)

• bacterial gastritis
  10 November 2005

  Types
  Helicobacter gastritis Helicobacter pylori gastritis Helicobacter heilmanii gastritis
  Enterococcus gastritis
  mycobacterial gastritis disseminated tuberculosis Mycobacterium avium-intracellulare (AIDS)
  gastric syphilis (Treponema pallidum-associated gastritis or syphilitic gastritis)
  See also
  Gastritis infectious gastritis

• chemical gastritis
  10 November 2005

  reactive gastritis

• radiation gastritis
  10 November 2005

  Gastritis resulting from irradiation of the stomach is uncommon, as is the reactive gastritis that can complicate intra-arterial chemotherapy.
  Early changes consist of necrosis of fundal glands, edema, and mononuclear cell infiltration. In a series of patients followed by serial biopsies there was prompt and complete reversal to normal.

• gastric lymphoid follicles
  10 November 2005

  Lymphoid aggregates with germinal centers are characteristic of chronic Helicobacter pylori gastritis and a hallmark of this diagnosis.
  There is sampling error in determining their prevalence, but if sufficient biopsy specimens are examined, they are found in 100% of H. pylori positive cases.
  Grading a feature whose prevalence is determined by the number of biopsy specimens taken is not indicated; however, the presence of follicles should be noted in the microscopic description.
  Lymphoid (...)

• chronic active gastritis
  18 October 2005

  CAG, active chronic gastritis

• APGC syndrome
  14 September 2005

  Achlorhydria, parietal cell hyperplasia, and multiple gastric carcinoids, APGC syndrome

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