Neuroendocrine Tumor Presented With Axillary Mass: A Case Report.

Sicilia Pozo, María de Las Nieves; López-Bermejo García, Fernando; Ruiz Disotuar, Niletys; Alarcón Molero, Lorena; Poblete García, Víctor Manuel · Clin Nucl Med · 2024

case_report · Level V

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Abstract

A 79-year-old man presented with a palpable left axillary mass and ultrasonography findings of conglomerate lymph nodes. The initial clinical suspicion was a lymphoproliferative disorder, but histopathological results revealed a grade 3 neuroendocrine tumor. The mass showed somatostatin receptor overexpression in 99m Tc-HYNIC-TOC scintigraphy and high uptake in 18 F-FDG PET/CT. Bilateral hypermetabolic adrenal nodes suggestive of metastases were also detected. The patient was treated with chemotherapy and immunotherapy, and PET/CT scan showed a partial metabolic response after 4 cycles. According to this case, neuroendocrine tumor should be considered in the differential diagnosis of axillary masses.

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