Contrast-enhanced ultrasonography findings of LAMNs with peritoneal and splenic metastases: a case report and literature review

Low-grade appendiceal mucinous neoplasms (LAMNs) are rare tumors that primarily diagnosed using computed tomography(CT) enhancement and magnetic resonance imaging (MRI). Herein, we report the sonographic features, especially for contrast-enhanced ultrasound (CEUS), of a 70-year-old female with an unusual LAMN metastasizing to peritoneum spleen. The patient had right pelvic mass 2 days prior presentation. Two-dimensional (2D) revealed mixed cystic-solid in lower abdomen spleen parenchyma; CEUS showed heterogeneous both areas, suspected be mass. CT MRI findings concurrent findings. Histopathologically, lesions were confirmed appendix, spleen, specimens obtained during exploratory laparoscopy. No recurrences reported at three years postoperatively. may metastasize abdominal organs, examinations essential diagnosis. This study presents major ultrasonography diagnosis LAMNs.