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Related Experiment Videos

Perivascular Ki-1 + lesions.

N Sioutos1, M E Kadin

  • 1Department of Pathology, Beth Israel Hospital, Boston, MA 02215.

International Journal of Hematology
|June 1, 1992
PubMed
Summary

This study identifies a rare morphologic finding, prominent perivascular cuffing, in Ki-1 positive lymphoproliferative disorders. This feature can mimic other tumors, highlighting the need for careful histologic evaluation in diagnosing these conditions.

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Area of Science:

  • Hematology
  • Oncology
  • Pathology

Background:

  • Ki-1 positive lymphoproliferative disorders encompass a range of lymphoid neoplasms.
  • Accurate diagnosis relies on a combination of histologic and immunophenotypic assessments.
  • Recognizing diverse morphologic presentations is crucial for effective patient management.

Observation:

  • Three male patients with Ki-1 positive lymphoproliferative disorders presented with prominent perivascular cuffing of tumor cells.
  • This unique morphologic feature involved small and medium-sized vessels.
  • One case demonstrated a pseudoglandular pattern, initially raising suspicion for adenocarcinoma.

Findings:

  • The observed perivascular cuffing, though infrequent (3/116 cases), is a significant architectural finding in Ki-1 positive lymphoproliferative disorders.
  • This feature can lead to diagnostic confusion with epithelial or mesenchymal tumors.
  • The study documents cases of Ki-1 positive anaplastic large cell lymphoma (ALCL) and lymphomatoid papulosis (LyP) with this characteristic.

Implications:

  • The findings suggest that perivascular cuffing should be considered in the differential diagnosis of Ki-1 positive lymphoproliferative disorders.
  • Including this feature in diagnostic criteria may improve the accuracy of identifying these lymphoid neoplasms.
  • Enhanced awareness of this architectural pattern can prevent misdiagnosis and guide appropriate therapeutic strategies.

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