Patterns of initial distant metastases in 151 patients undergoing surveillance for treated Merkel cell carcinoma
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View abstract on PubMed
Summary
This summary is machine-generated.Merkel cell carcinoma (MCC) metastasis patterns depend on primary tumor site, impacting survival. Full-body imaging may improve early detection of distant spread in MCC patients.
Area Of Science
- Oncology
- Dermatology
- Medical Imaging
Background
- Merkel cell carcinoma (MCC) frequently recurs and metastasizes distantly.
- Current surveillance imaging guidelines lack evidence-based support.
- Understanding metastatic patterns is crucial for early detection and improved patient outcomes.
Purpose Of The Study
- To investigate the relationship between primary tumor site and initial distant metastasis in MCC.
- To analyze the impact of primary tumor site on time to metastasis, overall survival (OS), and MCC-specific death (MSD).
- To inform evidence-based surveillance strategies for MCC.
Main Methods
- Retrospective analysis of 151 patients with Stage I-III MCC who progressed to Stage IV.
- Fisher's exact test used to compare metastasis patterns based on primary tumor site.
- Calculation of time to metastasis, OS, and MSD from diagnosis and initial distant metastasis.
Main Results
- 58.9% of patients had a single initial distant metastatic site; 41.1% had multiple sites.
- Upper limb primary tumors were associated with fewer lymph node and liver metastases (p=0.02, p=0.04).
- Liver (7.0 months) and bone metastases (8.9 months) significantly shortened OS; multiple metastatic sites increased MSD risk.
Conclusions
- Initial distant metastasis sites are linked to primary tumor location and survival.
- The frequent occurrence of multiple metastatic sites suggests the need for comprehensive imaging.
- Full-body cross-sectional imaging may enhance early detection of metastatic Merkel cell carcinoma.
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