Primary retroperitoneal mucinous cystadenoma

Mucinous cystadenomas and carcinomas of the ovary are well-established and common tumors. However, Primary retroperitoneal mucinous cystadenomas (PRMCs) are very rare. We present a 50-year-old woman referred to our institution with history of intermittent abdominal pain and palpable mass in her left flank. On CT-scan an unilocular cystic mass with thin wall measuring 171 × 155 × 108 mm in the retroperitoneum was shown. Patient underwent surgical excision of the tumor. The histopathology examination showed a cystic mass with a fibrous wall and an epithelium composed of a single layer of columnar cells with mucin vacuoles compatible with PRMC.     

A case of retroperitoneal mucinous cystadenoma treated successfully by laparoscopic excision

A case of retroperitoneal mucinous cystadenoma treated laparoscopically is reported. A 26-year-old woman, who complained of abdominal fullness, was referred to us after a large intra-abdominal mass was discovered at her local hospital. Ultrasound and computed tomography showed a fluid-filled mass, 9 cm in diameter, in the left retroperitoneal space. Laparoscopic surgery was performed. We found a smooth and thin-walled cystic tumor that displaced the descending colon to the right and arose from the retroperitoneum, loosely adhering to the psoas muscle. We successfully extirpated the tumor laparoscopically. The surgical specimen consisted of a multilocular, red to yellowish-gray, cystic mass with a smooth, glistening external surface, and inner lining. The mass was filled with thin, yellowish fluid. The histologic diagnosis was benign mucinous cystadenoma. The postoperative course was uneventful, and the patient remains free of recurrence 15 months after surgery. Retroperitoneal mucinous cystadenoma is a rare entity, and the treatment of choice is surgical excision. Laparoscopic extirpation should be considered for the treatment of selected retroperitoneal cystic lesions.     

Primary retroperitoneal mucinous cystadenoma. A case report and brief review of the literature

Retroperitoneal mucinous cystadenomas are extremely rare tumors found exclusively in women. An additional case of retroperitoneal mucinous cystadenoma histologically confirmed in a 41-year- old woman is reported herein. Computed tomographic (CT) scanning showed a cystic mass, 21 x 16 cm in size, in the right retroperitoneal space. Removal of the cystic tumor was performed without any other additional procedures, and further histological diagnosis was confirmed as primary mucinous cystadenoma of borderline type. Histologic findings suggested that the tumor developed from mucinous metaplasia of the coelomic mesothelium. Clinicopathological features, diagnostic findings, therapeutic options and the outcome are analyzed in this paper having reviewed the cases reported in world literature.     

Laparoscopic resection of a primary retroperitoneal mucinous cystadenoma: Report of a case

(Received for publication on July 4, 1996; accepted on Mar. 4, 1997)     

A case of retroperitoneal mucinous cystadenocarcinoma

A 61-year-old woman was admitted to our hospital for right abdominal mass. Various examinations revealed a retroperitoneal tumor. Open surgery was performed. Pathological findings revealed a mucinous cystadenocarcinoma. We review and discuss 24 cases of retroperitoneal mucinous cystadenocarcinoma reported in Japan.     

Mucin-producing cystadenoma (borderline malignancy) of the renal pelvis and ureter. A case report

The patient was a 63-year-old women who visited our hospital with the chief complaints of swelling, chills, fever and right lumbago. Fifteen years ago, she received surgical exploration for right renal stones at another department of urology. A large, soft and round kidney was palpable from the right upper quadrant of abdomen to the right lower abdomen. The parenchyma of the right kidney was thinned and inside the kidney there was a huge amount of yellowish mucin. The histological diagnosis was mucin-producing cyst-adenoma (borderline malignancy) of the renal pelvis and ureter. Mucin-producing cystadenoma of the renal pelvis and ureter origin was very rare, and only 4 similar cases to our patient were so far reported.     

A case of primary retroperitoneal mucinous cystadenocarcinoma

A 41-year-old Japanese woman was admitted to our hospital for right abdominal mass. Various examinations revealed a retroperitoneal lymphangioma. Tumor resection was performed and pathological diagnosis was a mucinous cystadenocarcinoma. It seems that screening with the tumor markers will be helpful for the diagnosis, because it is very difficult to diagnose a retroperitoneal mucinous cystadenocarcinoma before the operation.     

A mucinous tumor of the mesocolon with features of borderline malignancy

Primary mucinous cystadenoma of the mesocolon is a rare tumor with an uncertain histogenesis. A 38-year-old woman was diagnosed with a 17-cm cystic lesion in the left abdomen, identified as a mucinous cystadenoma of the mesocolon. This type of tumor appears rarely in extraovarian sites. We believe that metaplasia, either celomic or mucinous, is the most likely pathogenic mechanism. On rare occasions, a borderline or invasive component may be present.     

Recurrence of pulmonary mucinous cystic tumor of borderline malignancy

Cystic mucinous tumors of the lung are recently described neoplasms whose histology is different from most lung adenocarcinomas, and represent a spectrum of malignant potential. Little is known of the behavior of the more malignant subtype. We present a cystic mucinous tumor of borderline malignancy that recurred locally following initial limited resection, and was treated with lobectomy.     

Appendix mucinous cystadenoma

Mucous cystadenomas are benign epithelial tumours with great mucous content inside. Despite being non-malignant, they acquired great size, compressing and displacing important structures and organs of the zone, with theirs unlucky outcomes. Surgical exeresis is very difficult, being almost impossible its total exeresis, showing great frequency of relapse. We present an appendix mucous cystadenoma case in a 54 years old patient.     

Laparoscopic management of appendicular mucinous cystadenoma,case report

IntroductionAppendectomy is the most common emergency surgical procedure performed worldwide. Mucinous cystadenoma is a rare benign tumor of the appendix. There is no agreement on the best surgical approach for its management. Recently, laparoscopic approach is being increasingly tried. Careful excision of the tumor is mandatory to avoid content spillage into peritoneum resulting in pseudomyxoma peritonei.Case presentationA middle-age male patient presented to the emergency department complaining of chronic abdominal pain, bleeding per rectum and recurrent attacks of vomiting. Preoperative imaging confirmed presence of cystic lesion in the right lower quadrant. He underwent a diagnostic laparoscopy with resection of appendicular mucocele. The histopathological examination confirmed the diagnosis of appendicular mucinous cystadenoma. He was followed up in the clinic for two years.ConclusionAppendicular mucinous cystadenoma should be considered in differential diagnosis of cystic mass detected in the right lower quadrant of the abdomen on US or CT. Laparoscopic excision of the tumor is safe and feasible with extra care taken to avoid pseudomyxoma peritonei.’     

A case of CA19-9-positive retroperitoneal mucinous adenocarcinoma

We report a case of retroperitoneal mucinous adenocarcinoma in a 44-year-old woman, who was admitted to our hospital complaining of low grade fever. Computed tomography and magnetic resonance imaging demonstrated a cystic tumor located at the lower pole of left kidney with irregular wall, which was enhanced by contrast medium. Open surgery was performed. Macroscopically, the tumor was clearly separated from the left kidney, and diagnosed as retroperitoneal in origin. Histopathological diagnosis was mucinous adenocarcinoma of retroperitoneum and immunohistochemical staining was positive for CA19-9, but not for CA125. The patient had no recurrence for 19 months post-operatively.     

Recurrent pulmonary mucinous cystadenoma.

A pulmonary mucinous cyst adenoma is rare and there has been no report of the recurrence. We report a case of a 56-year-old female who had recurrent pulmonary mucinous cystadenoma. She had previously received a partial resection of the lung for a pulmonary mucinous cystadenoma 20 years ago. On this admission, a chest X-ray and CT scan revealed a large pulmonary mass, and a lung resection was performed. The resected lesion was histologically confirmed as mucinous cystadenoma. At 2 years to date after the second operation, the patient has no recurrence.