Anterior knee schwannoma

Abstract

Peripheral nerve tumors are relatively uncommon with schwannomas being the most common type. Schwannomas are usually benign encapsulated tumors composed of neoplastic Schwann cells that generally do not transform to malignancy. Many are discovered incidentally as solitary tumors. The cause is unknown. Most occur spontaneously, while some develop in association with genetic disorders such as neurofibromatosis type 2 or schwannomatosis. Schwannomas can occur anywhere in the body. They affect all ages, with peaking incidence between ages 20 and 50 years, without predilection to sex or race. Many are asymptomatic; however, presenting signs and symptoms, such as paresthesia and pain, are due to mass effect and direct nerve invasion. Diagnosing includes combinations of thorough physical examination, imaging modalities such as magnetic resonance imaging and surgical biopsy. Treatment depends on factors such as location of the tumor and severity of symptoms. Asymptomatic patients are treated conservatively while symptomatic patients undergo surgical resection with favorable prognosis.

Schwannoma en la región anterior de rodilla: caso clínico y revisión de la literatura

“…Este caso es particularmente relevante, porque la literatura refiere que son pocos los casos de schwannoma en rodilla 5 . En este caso presentado se trata de un paciente de sexo masculino, aunque la literatura menciona que no hay diferencia significativa en cuanto al sexo 6,7 .…”

“…No hay datos exactos sobre la prevalencia de los schwannomas periféricos, debido a que su ocurrencia es infrecuente, y la identificación de un schwannoma en la región anterior de la rodilla es particularmente rara 5 .…”

About a Rare Case of Chronic Ankle Pain: Unusual Localization of the schwannoma

“…As a complication, it may cause nerve damage, soft tissue or boney deformity. The main differentials diagnosis are ganglion cysts, lipomas and lipofibromatous hamartomas are usually easily compressible and soft to touch, whereas neoplastic tumors, like schwannomas, are firm to touch [6] Diagnosis can be suggested on US, CT, and MRI examina-a b Figure 3. Histological section showed that the tumors cells are regular spindle-shaped palisades (HEx200)…”

An Overview of Central Nervous System Tumours

“…They arise from the surface of neural elements in the body or within the brain, causing significant local problems on the nerves, blood vessels and adjacent structure of the bone [155]. Schwannomas can arise from the peripheral, spinal, and cranial nerves [155,156]. They are the most common type of peripheral nerve and neurogenic tumours.…”

“…Schwannomas mainly occur in adults and equally in males and females. Although the exact cause is unknown, multiple schwannomas are known to develop from genetic disorders such as neurofibromatosis type 2, schwannomatosis, and Carney complex [156]. Schwannomas are usually solitary, slow growing, and encapsulated neoplasm generally represented as painless swellings for several years before diagnosis which may lead to difficulties in clinical diagnosis and treatment [159].…”