Items tagged “tumour”

9 results found

Hemangioblastoma (central nervous system)

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

Osteoid osteoma

Osteoid osteomas are benign bone-forming tumors that typically occur in children (particularly adolescents). They have a characteristic lucent nidus <2 cm and a surrounding solid periosteal reaction which classically causes night pain that is relieved by the use of salicylate analgesia, e.g. asp...

Ovarian tumors

Ovarian tumors are relatively common and account for ~6% of female malignancies. This article focuses on the general classification of ovarian tumors. For specific features, refer to the subarticles. Pathology Subtypes Primary ovarian tumors Surface epithelial-stromal ovarian tumors (60-70%)...

Optic pathway glioma

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...

Transitional cell carcinoma (urinary tract)

Transitional cell carcinoma (TCC), also called urothelial cell carcinoma (UCC), is the most common primary malignancy of the urinary tract and may be found along its entire length, from the renal pelvis to the bladder.  As imaging findings and treatment vary according to where along the urinary...

Leiomyoma of the urinary bladder

Leiomyoma of the urinary bladder is a rare benign mesenchymal tumor of the bladder. The most common presenting complaints are urinary voiding symptoms such as obstruction and irritation.  It exhibits characteristics similar to those of uterine leiomyomas on ultrasound, CT and MRI. Usually chara...

Endometrioid carcinoma of the ovary

Endometrioid carcinomas of the ovary are a sub-type of epithelial ovarian tumors. The vast majority are malignant and invasive. On imaging, they are usually characterized as complex nonspecific solid-cystic masses and found associated with endometriosis.  Epidemiology Endometrioid carcinomas a...

Choroid plexus carcinoma

Choroid plexus carcinomas are malignant neoplasms arising from the choroid plexus. They are classified as a WHO grade III tumor and while there is considerable overlap in imaging characteristics it carries significantly poorer prognosis than both WHO grade II atypical choroid plexus papilloma, a...

Intracranial tumors (summary)

This is a basic article for medical students and other non-radiologists Intracranial tumors comprise a heterogeneous group of tumors. In adult patients, the majority represent metastatic disease with a smaller proportion being primary brain tumors. Metastasis to the brain occurs, most commonly,...

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