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Metastasis

Metastasis

Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
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Metastatic Non-Small Cell Lung Cancer Mimicking Metaplastic Breast Cancer: A Case Report.

Tanmayi S Pai¹, Blake McKinley¹, Robert Seby¹

¹Mayo Clinic, Jacksonville, FL.

JCO Precision Oncology

|June 21, 2024

Summary

Next-generation sequencing (NGS) aided in diagnosing a non-small cell lung cancer (NSCLC) case initially suspected to be metaplastic breast cancer. This molecular profiling facilitated appropriate treatment selection for the patient.

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Area of Science:

Oncology
Genomics
Diagnostic Pathology

Background:

Metaplastic breast cancer (MBC) is a rare and aggressive subtype of breast cancer.
Non-small cell lung cancer (NSCLC) can present with diverse histological patterns, sometimes mimicking other malignancies.
Accurate diagnosis is critical for appropriate therapeutic strategies in both conditions.

Observation:

A patient presented with clinical and radiological findings initially suggestive of metaplastic breast cancer.
Histopathological examination revealed features that prompted further investigation.
Next-generation sequencing (NGS) was employed to clarify the diagnosis and guide treatment.

Findings:

NGS analysis identified a primary non-small cell lung cancer (NSCLC) diagnosis.
Molecular profiling revealed specific actionable mutations within the tumor.
The findings excluded a diagnosis of metaplastic breast cancer.

Implications:

NGS is a valuable tool for differentiating rare and aggressive cancers with overlapping presentations.
Molecular profiling enables personalized treatment selection for NSCLC patients.
This case highlights the importance of advanced diagnostics in complex oncological cases.