Transpyloric prolapse of a pedunculated polypoid gastric carcinoma

A patient with transpyloric prolapse of a pedunculated polypoid gastric carcinoma is reported. Only three previous cases have been reported in the international literatures. However, in Japan, 33 cases of prolapsed gastric carcinoma have been reported during the past 30 years. Prolapsed gastric carcinoma should be included in the differential diagnosis of localized intraluminal filling defects in the duodenal bulb. Endoscopy and biopsy are essential for correct diagnosis.     

Transpyloric prolapse of a pedunculated polypoid gastric carcinoma

A patient with transpyloric prolapse of a pedunculated polypoid gastric carcinoma is reported. Only three previous cases have been reported in the international literatures. However, in Japan, 33 cases of prolapsed gastric carcinoma have been reported during the past 30 years. Prolapsed gastric carcinoma should be included in the differential diagnosis of localized intraluminal filling defects in the duodenal bulb. Endoscopy and biopsy are essential for correct diagnosis.     

Autoamputation of a giant colonic lipoma

Most colonic lipomas are asymptomatic and need no treatment, whereas lesions larger than 2 cm can cause acute abdominal pain, changes in bowel habits, gastrointestinal bleeding, intussusception or bowel obstruction. Autoamputation of polypoid lesions in the gastrointestinal tract is indeed a rare phenomenon, and its precise mechanism remains unknown. It presumably occurs due to ischemic necrosis of the polyp by peristalsis-induced torsion or tension. Here, we report a case of autoamputation of a giant colonic lipoma in a 48-year-old man. In our case, colonoscopic examination showed a huge autoamputated mass in the rectum and a remnant long stalk in the transverse colon. The autoamputated mass in the rectum was completely removed after fragmentation using an electrosurgical snare, and the remnant long stalk located in the transverse colon was also resected safely by endoscopic snare polypectomy. To our knowledge, these endoscopic treatments for removal of an autoamputated mass and a remnant long stalk of colonic lipoma have not been reported previously.     

A large fibrous polyp of the gallbladder mimicking a polypoid carcinoma

Fibrous polyp of the gallbladder is a rare variant of benign gallbladder polyp. Differentiation between a benign polyp and polypoid carcinoma of the gallbladder is often difficult when the polyp is more than 1cm in diameter. We report a rare case of a large fibrous polyp of the gallbladder mimicking a carcinoma. A 44-year-old Korean woman who presented with abdominal pain was diagnosed with a large gallbladder polyp, measuring 1.26cm in diameter, by abdominal ultrasonography. The lesion was echogenic with a nodular surface on ultrasonography, and showed contrast enhancement on computed tomography. Neither evidence of infiltration into the gallbladder wall nor lymph node enlargement was shown. The resected gallbladder showed a 1.2 × 0.8-cm-sized polyp with a nodular surface. Histologically, it showed a leaf-like configuration and loose or cellular connective stroma containing scattered duct-like structures, varying-sized vessels, and patchy infiltration of chronic inflammatory cells. Stromal cells were immunoreactive for vimentin and smooth-muscle actin and negative for S-100 protein and desmin. Large fibrous polyps of the gallbladder should be considered in the differential diagnosis of benign and malignant polypoid lesions of the gallbladder.     

Radiation-induced carcinoma of the rectum

Carcinomas and sarcomas are known to develop after radiation therapy. A complete review of the literature regarding appearance of carcinoma of the rectum following radiation therapy to the pelvis was undertaken. The average interval between irradiation and diagnosis of the rectal cancer was 15.2 years, the range being from one year, two months to 33 years. We present a case of carcinoma of the rectum arising as two separate primaries 46 years after irradiation for an epidermoid carcinoma of the cervix. There were many pathologic changes related to the radiation therapy.     

Small-cell carcinoma of the rectum

Small-cell carcinoma of the rectum is an infrequent pathologic finding, and its precise incidence is unknown. Its incidence is less than 0.2 percent among all colorectal cancers. This tumor manifests highly aggressive behavior. The treatment of choice is combination chemotherapy similar to that used for small-cell carcinoma of the lung, but in small localized tumors surgery plus chemotherapy is an alternative. We present two cases of small-cell carcinoma of the lower rectum and a review of the literature.     

Small-cell carcinoma of the rectum

Small-cell carcinoma of the rectum is a rare tumor. We treated a patient with small-cell carcinoma of the rectum with radiation and multidrug regimen being used for small-cell carcinoma of the lung. Within two months of chemotherapy, the primary lesion, as evaluated by rectoscopy, biopsy, and CT scan, had resolved completely. The patient was in complete remission for 12 months after initiation of chemotherapy and died of widespread metastases. At autopsy, no residual tumor was found in the rectum. This case stresses the importance of ultrastructural study in the differential diagnosis of small-cell cancer of the rectum and the fact that this tumor can be treated in the same fashion as for small-cell carcinoma of the lung with multidrug chemotherapy and radiation therapy to achieve local control.     

Small-cell carcinoma of the rectum

Three cases of small-cell carcinoma of the rectum are presented. Our conclusions are as follows: small-cell carcinoma and carcinoid tumor of the rectum might have a common origin; indications for surgical intervention for small-cell carcinoma of the rectum should be considered seriously; small-cell carcinoma of the rectum should be classified as an aggressive type of rectal tumor that metastasizes easily to distant organs.     

Diminutive cancers of the colon and rectum: comparison between flat and polypoid cancers

A comparative study of polypoid and flat colorectal cancers less than 20 mm in size was made. A review of the characteristics of 56 polypoid cancers and 29 flat cancers treated between April 1989 and January 1996 was performed. Both groups of cancers showed similar age and location distribution. Polypoid cancers were more likely to be well differentiated (38%) than were flat cancers (17%) (P<0.05). Flat cancers were more likely to have reached the serosa (52% vs 12%; P<0.01) and also demonstrated a higher frequency of lymph node involvement (41% vs p 9%) (P<0.01) when compared to polypoid cancers. Flat colorectal cancers belong to a distinct subset which demonstrates greater biological aggressiveness than polypoid cancers of equivalent size. Accepted: 5 June 1998     

Transpyloric prolapse of polypoid gastric carcinoma.

Four patients with discrete intraluminal filling defects in the duodenal bulb secondary to transpyloric prolapse of polypoid gastric carcinoma are reported. The lesions were pedunculated in 2 cases and sessile in the remaining 2. The clinical, radiological,and pathological findings are discussed. Prolapsed gastric carcinoma should be included in the differential diagnosis of localized intraluminal filling defects in the duodenal bulb and endoscopy and biopsy performed in patients with appropriate clinical and radiological findings.     

Primary squamous carcinoma of the rectum

Squamous cell carcinoma of the colorectum is a rare pathologic curiosity. Since the first report by Schmidtman in 1919, only 69 cases have been reported in the English medical literature. The mean age at presentation is 52 years, and the disease presents itself equally in men and women. The rectum accounts for slightly less than one half of all cases. Survival appears to correlate with nodal status and findings of visceral metastases at presentation. Most tumors can be identified easily by physical examination and/or barium enema. Therapy is limited largely to surgical resection, although attempts at irradiation and chemotherapy have been made. At this time, the etiology of this disease process is unknown, but a likely explanation revolves around replacement of damaged epithelium by cells which undergo anaplasia due to repeated trauma. In addition to this review of the literature, the authors wish to add one additional report of a patient treated successfully by a multimodality approach.     

Squamous cell carcinoma of the rectum

Summary A case of squamous cell carcinoma of the rectum is reported. This case is of interest because of its unusual histologic type and because it was discovered at a stage in which its pathogenesis could be readily determined. The views expressed are those of the authors and do not necessarily reflect those of the Navy Department or the Naval Service as a whole.