Ultrasound Diagnosis Two Cases of Multiple Primary Malignancies Neoplasms: Thyroid Carcinoma, Breast Carcinoma, and Non‐Hodgkin Lymphoma

Multiple primary malignant neoplasms (MPMNs) refer to the simultaneous or sequential presence of two or more malignant tumors in a single individual, with the clear exclusion of the possibility of metastasis between these tumors. The combination of thyroid carcinoma, breast carcinoma, and non-Hodgkin lymphoma is a rare manifestation of MPMNs, and accurate identification and diagnosis of these cases hold significant clinical importance. Due to its high resolution, affordability, and capability for superficial examination, ultrasound is often the preferred method for evaluating the thyroid, breast, and lymph nodes. Currently, ultrasound can provide accurate assessments of the nature of nodules in these areas through two-dimensional imaging combined with fine-needle aspiration biopsy. This study will present the ultrasound findings and the results of ultrasound-guided needle aspiration biopsies from two cases of MPMNs involving thyroid cancer, breast cancer, and non-Hodgkin lymphoma.