Items tagged “tumour”

Hemangioblastomas are tumors of vascular origin and occur both sporadically and in patients with von Hippel Lindau disease. They are WHO grade 1 tumors, which can occur in the central nervous system or elsewhere in the body, including kidneys, liver, and pancreas. These tumors generally present...

Osteoid osteomas are benign bone-forming tumors that typically occur in children (particularly adolescents). They have a characteristic lucent nidus <1.5 or 2 cm and surrounding osteosclerotic reaction, which classically causes night pain that is relieved by the use of NSAIDs. Epidemiology Ost...

Ovarian tumors are relatively common and account for ~6% of female malignancies. This article focuses on the general classification of ovarian tumors. For specific tumor features, please refer to the relevant subarticles. Pathology Subtypes Primary ovarian tumors Surface epithelial-stromal o...

Optic pathway gliomas are relatively uncommon tumors, with a variable clinical course and usually seen in the setting of neurofibromatosis type I (NF1). Histologically the majority are pilocytic astrocytomas. They are characterized by imaging by an enlarged optic nerve seen either on CT or MRI....