Laparoscopic Non-clamping Tumor Enucleation of Renal Hilum Schwannoma in a Single Kidney: A Case Report

Abstract

A 56-year-old woman underwent laparoscopic right nephrectomy due to pyonephrosis associated with right ureteral stones. Moreover, the patient developed a brain stem hemorrhage and became bedridden. At the time of nephrectomy, a renal tumor, with a size of 24 × 24 × 20 mm, was observed in the left renal hilum; the tumor did not show contrast enhancement on computed tomography. After 3 years, the tumor gradually grew to a size of 45 × 35 × 34 mm, and therefore, laparoscopic non-clamping tumor enucleation was performed. Pathological examination confirmed a diagnosis of renal schwannoma.

A case of renal schwannoma

“…Of these, 4 were diagnosed as malignant. 2 , 3 , 4 It has been reported that schwannomas that meet the following conditions should be considered malignant: (1) tumor diameter greater than 5 cm, (2) cell atypia, nuclear division, or infiltrative growth, (3) intratumoral hemorrhage or necrosis, and (4) Ki-67 positivity 5–65%, which increases the likelihood of malignancy. 5 In the present case, none of the above conditions apply, and malignancy is unlikely.…”

Renal Schwannoma: A Rare Case Report and Literature Review

“…Schwannomas typically arise in the head, neck, and upper extremities. While retroperitoneal involvement is uncommon, renal schwannomas are extremely rare, with very few cases documented in the literature [4].…”

Robot-Assisted Laparoscopic Renal Schwannoma Excision

“…The first reported laparoscopic excision of a retroperitoneal schwannoma tumors was described in the 1990s. Hanashima et al reported laparoscopic tumor enucleation of a renal hilar tumor in a solitary kidney, 4 which further described the feasibility of a minimally invasive approach to renal schwannomas. To our knowledge, our presented case is the first to incorporate the da Vinci ® surgical system for excision of renal schwannoma.…”