Graft Versus Host Disease Workup

Updated: Aug 02, 2017
  • Author: Romeo A Mandanas, MD, FACP; Chief Editor: Mary C Mancini, MD, PhD, MMM  more...
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Workup

Laboratory Studies

The workup for graft versus host disease (GVHD) is guided by understanding of the disorder’s characteristics. Acute GVHD usually does not occur until after engraftment. Poor graft function may be a sign of autoimmune cytopenias (eg, thrombocytopenia, anemia, leukopenia) that may be observed with chronic GVHD.

On liver function tests (eg, bilirubin, aspartate aminotransferasealanine [AST], alanine aminotransferase [ALT], alkaline phosphatase, total protein, albumin), elevation of the alkaline phosphatase concentration is an early sign of liver involvement by GVHD. A cholestatic picture is usually observed. Hypoalbuminemia is typically due to GVHD-associated intestinal protein leak and a negative nitrogen balance.

Serum electrolytes and chemistries (eg, potassium, magnesium, bicarbonate levels) may be altered. Massive diarrhea and diminished oral intake can lead to serious electrolyte abnormalities.

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Imaging Studies

Hepatic and Doppler sonography can be used to distinguish GVHD from other causes of jaundice or cholestatic liver function abnormalities, such as cholecystitis and veno-occlusive disease of the liver. A barium swallow study can be used to detect esophageal changes of chronic GVHD, such as the following:

  • Web formation
  • Ringlike narrowing
  • Tapering structures of the middle and upper esophagus
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Other Tests

See the list below:

  • The Schirmer test is used to measure the degree of tear formation by the lacrimal glands, which can be affected in chronic GVHD.
  • Pulmonary function tests and arterial blood gas analysis can be used to identify obstructive pulmonary disease (eg, obliterative bronchiolitis) in chronic GVHD.
  • Manometric studies of the esophagus can demonstrate poor acid clearance and motor abnormalities that range from aperistalsis to high-amplitude contractions.
  • Genetic polymorphisms, such as those seen in the adhesion molecule CD31 when it is mismatched between donor and recipient, are predictive of an increased risk for GVHD. [35] The IL-10-592A allelic polymorphism is a marker for a favorable outcome after transplantation in recipients of hematopoietic stem cells from HLA-identical siblings. [36]
  • Low numbers of circulating dendritic cells at the time of myeloid engraftment significantly increase the risk of relapse and acute GVHD and are predictive of death after allogeneic HCT. [37]
  • A biomarker panel (4 proteins: interleukin-2 receptor-α, tumor necrosis factor receptor 1, interleukin-8, and hepatocyte growth factor) measured in the serum by sequential enzyme linked immunosorbent assay (ELISA) at the onset of clinical symptoms was able to confirm GVHD with 95% specificity. [38, 39] If validated in prospective studies, this high-risk biomarker profile may eliminate the need for an invasive biopsy procedure to confirm the diagnosis of GVHD.
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Procedures

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  • Findings on skin punch biopsy help establish the diagnosis of GVHD when the patient's clinical features are consistent with the syndrome.
  • Upper-GI endoscopy and biopsy, when performed in patients with persistent anorexia and vomiting, may reveal a variety of diagnoses, including GVHD, peptic ulceration, or mycotic or viral infection.
  • On gastroduodenal biopsy, alterations in endothelial cells in the absence of signs of infections may be predictive of the severity of GVHD. These alterations include rupture of capillary basement membranes and extravasated red blood cells.
  • Flexible sigmoidoscopy or colonoscopy with biopsy of sigmoid or colonic lesions may be helpful. In patients with diarrhea, GVHD may involve the colonic mucosa.
  • Liver biopsy is rarely performed, usually only in patients with isolated hepatic findings.
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Histologic Findings

Characteristic findings on histologic examination of skin (eg, eosinophilic bodies), liver (eg, necrosis of the bile duct), and gut (eg, crypt-cell degeneration) soon after transplantation may be difficult to distinguish from the effects of the conditioning chemoradiotherapy. Serial biopsy and observation help establish the diagnosis and severity of acute GVHD.

On histology, mononuclear-cell infiltration and inflammation of affected epithelium is more subtle in chronic GVHD than in acute GVHD. Dermal fibrosis and inflammation of sweat glands can be used to distinguish chronic GVHD of skin from acute GVHD. Fibrosis of the submucosa and serosa is observed when chronic GVHD involves the GI tract. See the image below.

Acute graft versus host disease (GVHD). Hematoxyli Acute graft versus host disease (GVHD). Hematoxylin and eosin–stained tissue shows dyskeratosis of individual keratinocytes and patchy vacuolization of the basement membrane. Moderate superficial dermal and perivascular lymphocytic infiltrate are also observed. Courtesy of Melanie K. Kuechler, MD.
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