Schwannomatosis of the sciatic nerve: a case report

Plexiform schwannomas of the sciatic nerve: a case report and review of the literature

“…There were 8 males and 15 females, with an average age of 44 years.Among the 23 patients, 22 patients complained of pain, and 5 of them had paraesthesia at the same time.The average duration of symptoms in these patients was 20.05 months before diagnosis.Only half of the patients' tumors can be detected by palpation.Of the 11 patients whose tumors were not detected on the body surface, 8 were positive for tinel sign, and the rest were unknown.Only 4 patients had multiple schwannomas.The largest tumor was 13.9 cm in length and the smallest was 1 cm, with an average diameter of 4.27 cm. We report a rare case of plexiform neurilemmoma in the sciatic nerve,which has only been reported once before [22] .Erdoğan found 7 schwannomas on the left thigh of a 22-year-old man, whose morphological and histological examination were similar to those in this case [22] .The young man, like the woman in this case, received treatment for the lumbar spine for more than a year before correct diagnosis.Previous studies have shown that there is no difference in the incidence of schwannomas between men and women [1,25] .However, our statistics show that women are more likely to develop sciatic schwannomas.Patients with sciatic schwannoma mainly take pain as the rst symptom, and sometimes have sensory disorders.Schwannomas are usually small and solitary, so when located in the thigh, the detection rate of palpation is low [25] .We believe that schwannoma on the sciatic nerve is obviously misleading.For patients who complain of pain in the sciatic innervation area, doctors tend to consider the possibility of lumbar disease. Therefore, it usually takes more than 1 year from the onset of symptoms to the correct diagnosis.Although the incidence of sciatic schwannoma is very low, it should also attract the attention of doctors, and careful physical examination is necessary.When schwannoma can not be found by palpation, tinel sign and MRI are important examination methods.The tinel sign of schwannoma is usually positive.…”

Plexiform schwannomas of the sciatic nerve:a case report and review of the literature

“…When the sciatic schwannomas cannot be detected by physical examination, a positive Tinel's sign is an important diagnostic indicator. In terms of tumor morphology, most schwannomas grow in isolation, with few having more than three [ 5 , 10 , 32 ]. Sciatic schwannomas are usually small, with an average diameter of 5.29 cm.…”

“…We searched the pubmed database using the keyword [(schwannoma*) AND (Sciatic)] from January 1, 2001 to December 1, 2022. Finally, 31 case reports were selected, with a total of 33 patients diagnosed with sciatic schwannoma [ [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] ] ( Table 1 ). There were 13 males and 20 females, with an average age of 45.3 years.…”

Laparoscopic excision for intrapelvic schwannoma of the sciatic nerve: A case report

“…Although the sciatic nerve is the largest nerve of the human body, schwannomas localized in the sciatic nerve are very rare, <1% (7,8). During surgery, the sciatic nerve is usually exposed through a posterior median approach outside the pelvis.…”