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Case Reports
. 2023 Mar 3;15(3):e35730.
doi: 10.7759/cureus.35730. eCollection 2023 Mar.

Peritoneal Carcinomatosis From Malignant Melanoma After Wide Local Excision of a T1a Lesion: A Case Report

Matthew Hager  1 , John Miller  1 , Adam Wegener  1 , James Yon  1
Affiliations
Case Reports

Peritoneal Carcinomatosis From Malignant Melanoma After Wide Local Excision of a T1a Lesion: A Case Report

Matthew Hager et al. Cureus. .

Abstract

Cutaneous melanoma is an aggressive skin cancer with a high propensity for distant metastasis. Peritoneal metastasis from cutaneous malignant melanoma is extremely rare and associated with a low five-year overall survival rate. This report reviews a case of a 78-year-old man with peritoneal carcinomatosis after a wide local excision of a T1a invasive malignant melanoma of the scalp 10 months prior. Although rare, patients with a recent history of melanoma who present with obscure or odd symptoms should be worked up for metastatic disease by their surgeon or medical oncologist. Carcinomatosis can develop, and early treatment with immunotherapy has been shown to improve five-year overall survival and progression-free survival in patients with advanced melanoma.

Keywords: cutaneous malignant melanoma; lactate dehydrogenase; melanoma; metastatic melanoma; peritoneal carcinomatosis; peritoneal metastasis; skin cancer.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Figure 1
Figure 1. CT abdomen and pelvis with omental caking on December 22, 2020
Figure 2
Figure 2. Abdominal ascites and nodularity of the omentum suggestive of peritoneal carcinomatosis seen on chest CT on December 28, 2020
Figure 3
Figure 3. H&E stain of peritoneal biopsy
Figure 4
Figure 4. SOX-10 stain of peritoneal biopsy
See this image and copyright information in PMC

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