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Zorluk: OrtaPathology and Biopsy Interpretation

A 64-year-old man with a 15-year history of poorly controlled gastroesophageal reflux disease undergoes a screening upper endoscopy. Irregular, salmon-colored mucosa is noted extending 4 cm proximal to the gastroesophageal junction. Four-quadrant biopsies are obtained. The synoptic pathology report describes gastric-type and intestinal-type mucosa with prominent goblet cells. The glandular epithelium demonstrates marked architectural distortion, loss of nuclear polarity, marked nuclear pleomorphism, and atypical mitotic figures that extend to the luminal surface. The basement membrane remains entirely intact without single-cell infiltration into the adjacent tissue.

Based on these histopathologic findings, which of the following is the most accurate diagnostic interpretation?

  1. High-grade dysplasiaCevap
  2. B
    Low-grade dysplasia
  3. C
    Intramucosal adenocarcinoma
  4. D
    Invasive esophageal adenocarcinoma
  5. E
    Non-dysplastic Barrett esophagus

Cevap

The most accurate diagnostic interpretation is high-grade dysplasia.
The correct diagnosis is high-grade dysplasia. The biopsy shows intestinal metaplasia (Barrett esophagus) that has progressed to a state of severe dysplasia, evidenced by full-thickness marked cytologic atypia, architectural distortion, and atypical mitoses. Crucially, because the basement membrane remains intact and there is no invasion into the lamina propria, the lesion has not yet progressed to adenocarcinoma.

Adım Adım Çözüm

1
Identify the baseline pathological change in the distal esophagus.
The presence of columnar epithelium with prominent goblet cells indicates intestinal metaplasia, establishing the diagnosis of Barrett esophagus.
Recognizing the underlying condition is the first step in interpreting the significance of superimposed dysplastic changes.
2
Evaluate the degree of cytologic and architectural atypia.
The epithelium shows marked architectural distortion, loss of nuclear polarity, nuclear pleomorphism, and atypical mitoses extending all the way to the luminal surface.
The severity and full-thickness extent of these atypical features classify the changes as high-grade rather than low-grade dysplasia.
3
Determine the status of the basement membrane to rule out invasive malignancy.
The pathology report explicitly states that the basement membrane is entirely intact without infiltration.
An intact basement membrane distinguishes high-grade dysplasia (carcinoma in situ) from intramucosal or frankly invasive adenocarcinoma.

Anahtar Kavram

Interpretation of esophageal biopsy findings to distinguish high-grade dysplasia from adenocarcinoma based on basement membrane integrity.
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Pathology and Biopsy Interpretation

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