Multilocular cyst of kidney with embryonic tissue

Multilocular cysts of kidney. A study of 29 patients and review of literature

Multilocular renal cyst is a distinct renal tumor whose gross external appearance and absence of normal renal tissue within the septa of loculi distinguish it clearly from other renal cystic lesions. Interlocular septa may contain either (1) fibrous tissue alone or (2) embryonic tissue separating adjacent loculi. Of 29 patients with multilocular renal cysts, 24 underwent a renal-sparing procedure, and only 5 had radical nephrectomy. None of the histologic specimens showed evidence of immature renal tissue or neoplasia. Patients were followed from three months to eight years (mean, 39 months), and no evidence of local recurrence or metastatic disease was found. Because it is difficult to distinguish multilocular renal cyst from cystic Wilms tumor and multicystic clear cell carcinoma on the basis of imaging studies alone, surgical intervention is the only effective method to differentiate multilocular renal cyst from a malignant lesion of the kidney.

Multilocular renal cyst. Scanning and transmission electron microscopic observations

A multilocular renal cyst in a boy aged one year and four months is presented, with particular attention being paid to the nature of the epithelial lining cells. Light and transmission electron microscopy showed the cyst to be lined by a single layer of flattened or cuboidal epithelial cells of relatively uniform morphology. Neither embryonic elements nor nephroblastomatous foci were noted in the intervening stroma. The scanning electron microscopy showed hitherto undescribed surface morphological features of the epithelial lining cells: They were characterized by the presence of one or, occasionally two centrally positioned long cilia and by variably oriented microvilli. The observations presented here suggested that the lining cells of the cyst most closely resembled the principal cells of the collecting ducts, especially those located in the inner medulla of the kidney. An unexpected finding was the additional occurrence of a giant bullous lesion in the right lung of this patient.

Multilocular cystic nephroma: report of three cases

Multilocular cystic nephroma is an uncommon renal neoplasm which in childhood usually presents as an abdominal mass. The same condition is also described as multilocular kidney and multilocular cystic hamartoma. The clinical presentation, and radiological findings in three cases of multilocular cystic nephroma are described.

Cystic Nephroma in Children. Report of a Case

A case of cystic nephroma is described in a 20-month-old female. The diagnosis of this rare renal pathologic lesion is essentially based on its pathologic features. The treatment consisted of nephrectomy followed by a brief course of chemotherapy. The literature is reviewed with regard to the pathologic features and treatment of this lesion, which has a favorable prognosis.

Multilocular cyst of the kidney: a case report

A 69-year-old female was referred to Roswell Park Memorial Institute for management of a right kidney tumor. Her evaluation included excretory urography, ultrasound, computerized axial tomography (CT scan), and selective renal angiography. Fine needle aspiration cytology was felt to be consistent with primary renal cell carcinoma. In spite of the radiological appearance of a benign lesion, a right radical nephrectomy was performed because of the positive cytology on fine needle aspiration. The pathological diagnosis was a solitary multilocular cyst of the kidney.

Multilocular cystic renal adenocarcinoma: a case report and review of the literature

A case of multilocular cystic renal adenocarcinoma is presented. Although the multilocular renal cyst is an uncommon lesion, nine cases of these lesions associated with adenocarcinoma have been reported in the English literature so far. The related reports are reviewed in addition to three cases in the Japanese literature.