Masa palpable en muslo con antecedente traumático Translated title: Palpable mass in thigh with trauma antecedent

Schwannomas are peripheral nerve sheath tumors. Schwannomas arising in the sciatic nerve are considered a rare condition. Their symptomatology usually mimics sciatic pain due to a herniated disc, which can delay the diagnosis. We report the case of a patient with chronic sciatica in whom Magnetic Resonance Imaging (MRI) examination of the right thigh revealed a tumor of the sciatic nerve. Excision of the tumor was easily performed without neural lesioning. Histopathological examination revealed the tumor to be a schwannoma. No neurologic deficit was noted postoperatively which confirms the good prognosis of this tumor.

Forty-eight B-scan ultrasound examinations were performed on 25 patients with hematomas. Hematomas are usually spherical or ovoid within the abdomen, and lentiform within the pleural space or abdominal wall. They generally decrease in size with time, and usually have irregular walls. Hematomas contain a variable amount of internal echoes during the first month, and then gradually become anechoic. The sonographic appearance is not specific; an abscess may have a similar appearance. An old, anechoic hematoma may contain a gelatinous material which cannot be aspirated.