Pleomorphic adenomas (benign mixed tumors) are the most common tumors of glandular origin in the head and neck and are one of the few benign neoplasms that can undergo malignant transformation.(1) Mixed tumors that are seemingly benign at the microscopic level but metastasize have been termed metastasizing mixed tumors (MZMTs). The entity of metastasizing benign mixed tumors has been reported s...

Background & Aims: Early detection and reliable differentiation of benign and malignant liver tumors could lead to improved cure rate and costs. Ultrasound image (US) is a convenient medical imaging method for interpreting liver tumors. Visual inspection of ultrasound images sometimes is combined with error and needs biopsy to confirm whether a tumor would be benign or malignant. The aim of thi...

Osteochondroma, also known as osteocartilaginous exostosis or just exostosis, was initially described in 1843 by Reid [1]; it is a common benign tumor of the bone accounting for 10% to 15% of all bone tumors and 20% to 50% of all benign bone tumors [2]. These lesions are the most common benign tumors of the appendicular skeleton, located in the metaphyseal region of long bones, particularly the...

Ewing's sarcoma of the calcaneum is rare. Radiological features of this tumor can be misinterpreted as other benign bone tumors due to its rarity. The overall prognosis of Ewing's sarcoma of calcaneum is inferior compared to other sites of this tumor. Hence, these tumors should have extensive radiological evaluation and histological confirmation as misdiagnosis and treatment delays will have de...

Aims At the histological level, the differential diagnosis of osteoblastic bone tumors is characterized by several problems that cannot be solved by conventional histological methods, including immunohistology. Differentiating aneurysmal bone cyst from telangiectatic osteosarcoma or giant cell tumor from giant cell-containing highly malignant osteosarcoma are only two examples reflecting the co...

Malignant bone tumors in children occur rarely. Estimated annual incidence is 7 cases per 1.000.000 children under the age of 16. Due to its rare occurrence and often unspecific signs and symptoms, a lot of physicians do not consider this diagnosis early enough. Therefore it is not surprising that the majority of patients are referred to the pediatric oncologist when the disease is already in a...

OBJECTIVE The purpose of this study was to present the MRI and CT findings of solitary spinal bone lesions (SSBLs) with the aims of aiding the differential diagnoses of malignant tumors and benign lesions, and proposing a diagnostic strategy for obscure SSBLs. METHODS The authors retrospectively reviewed the imaging findings of 19 patients with an obscure SSBL on MRI at our hospital from Janu...