Paragangliomas are neoplasms of neural crest origin. In the head and neck, they uncommonly involve the larynx. The distinction between paragangliomas and other neuroendocrine tumors can be difficult. Precise diagnosis is important in order to optimize patient treatment. Diagnosis relies mostly on histopathologic examination followed by immunohistochemistry. Here we report a 77-year-old woman wi...

osteosarcoma (os) is a malignant mesenchymal tumor, which rarely occurs in the maxilla. although variable histologic and radiographic features of os have been reported previously, in the majority of the cases painful swelling of the jaw is mentioned as the first clinical presentation. furthermore, early diagnosis and wide surgical resection of the tumor are the most important determinant factor...

introduction: sialadenoma papilliferum (sp) is a rare benign tumor, which originates from the minor salivary gland. it occurs at sites that have minor salivary glands, such as the palate, retromolar pads, buccal mucosa, and lips. the most common location for tumor development is on the hard palate. a differential diagnosis consists of ruling out other salivary gland tumors. transoral robotic su...

abstract background solid pseudo-papillary tumor of the pancreas (sptp) is a rare disease with a low malignant potential. though it shows low malignant potential 10% to 15% of the cases show aggressive behavior with metastatic involvement of the liver. the symptoms include abdominal discomfort and abdominal pain. it is very rare in early years of age. this is the case of a 10 year old girl with...

aim : to create an orthotopic hepatoma model with local metastasis monitored with ultrasound could be created as a platform for testing new treatments.   background : hepatoma accounts for 25% of liver tumors in children with poor overall survival. intraabdominal metastasis are present in 35% of patients at time of diagnosis.  we hypothesized that an orthotopic tumor model with local metastasis...

Chordomas are rare tumors from primitive notochord. They are usually located at sacrococcygeal region when it affects the spine. We present a case of giant chordoma in the thoracolumbar spine in Peru. A 43-year-old woman came to the hospital in Huanuco due to back pain and sensorymotor alterations in the lower limbs. Imaging confirmed an unresectable tumor involving the spine. Two years later, ...

superficial acral fibromyxoma are rare soft tissue tumors predominantly involving hands and feet of adults. there are only a few reported cases of this benign neoplasm, but no fnac diagnosis of this tumor is reported in the literature. a forty-eight year old female presented with a 5 x 3.5 cm globular, firm swelling over the right fifth toe. fine needle aspiration cytology (fnac) of the lesion ...