Cutaneous Intravascular Hematolymphoid Entities: A Review

Area of Science:

• Hematology
• Oncology
• Pathology

Background:

• Intravascular lymphomas are rare neoplastic conditions characterized by lymphoid cells within vascular lumens.
• These lymphomas primarily originate from B-cells but can also present with NK/T-cell or CD30+ immunophenotypes.
• Distinguishing intravascular lymphomas from benign conditions is crucial for accurate diagnosis and treatment.

Purpose of the Study:

• To review the clinical, histopathologic, and molecular features of intravascular lymphomas.
• To differentiate intravascular lymphomas from benign conditions, including intralymphatic histiocytosis and intravascular atypical CD30+ T-cell proliferation.
• To provide a comprehensive overview of these rare vascular-based lymphoid neoplasms.

Main Methods:

• Review of existing literature on intravascular lymphomas and related conditions.
• Analysis of clinical presentations, histopathologic findings, and molecular data.
• Comparison of malignant intravascular lymphomas with benign proliferations.

Main Results:

• Intravascular lymphomas predominantly involve B-cells but can exhibit other immunophenotypes.
• Histologic differential diagnoses include intralymphatic histiocytosis and benign atypical CD30+ T-cell proliferation.
• Key differentiating features across clinical, histopathologic, and molecular domains are discussed.

Conclusions:

• Accurate diagnosis of intravascular lymphomas requires careful integration of clinical, histopathologic, and molecular findings.
• Distinguishing these rare lymphomas from benign mimics is essential for appropriate patient management.
• Further research into the specific subtypes and molecular underpinnings of intravascular lymphomas is warranted.