Oncologic impact of pathologic response on clinical outcome after preoperative chemoradiotherapy in locally advanced rectal cancer

PURPOSE: Downstaging after chemoradiotherapy (CRT) for rectal cancer usually occurs. The present study aimed to evaluate pathologic y-stage (yp-stage) and its influence on local recurrence and systemic recurrence in rectal cancer patients treated with CRT followed by surgical resection. METHODS: We retrospectively analyzed 261 patients underwent preoperative CRT and radical resection for rectal cancer between August 2004 and December 2010. Patients received preoperative CRT consisting of 5-fluorouracil and leucovorin delivered with concurrent pelvic radiation of 45.0-50.4 Gy, followed by radical surgery at 6-8 weeks after CRT. RESULTS: Of the 261 patients, 24 (9.2%) had yp-stage 0, 83 (31.8%) had yp-stage I, 86 (32.9%) had yp-stage II, and 68 (26.1%) had yp-stage III. Patients with yp-stage III had a greater prevalence of preoperative CEA, poorly differentiated tumor, lymphovascular invasion (LVI) and perineural invasion (PNI) than patients with lower yp-stages. We found that yp-stage, preoperative CEA, LVI, PNI and tumor regression grade were significant prognostic factors for both local and systemic recurrence. In multivariate analysis, yp-stage, LVI and PNI were significant factors for local and systemic recurrence. During the median follow-up of 37.5 months, the five-year local recurrence-free survival rate was 100.0%, 95.0%, 89.3%, and 80.6% of yp-stage 0-III, respectively. The five-year systemic recurrence-free survival was 95.8%, 75.3%, 71.4%, and 48.8% of yp-stages 0-III, respectively. CONCLUSION: The yp-stage after preoperative CRT for rectal cancer is closely correlated with local and systemic recurrence-free survival. Therefore, yp-stage should be considered as a prognostic factor for rectal cancer patients having a course of preoperative CRT.

Preoperative predictors of malignant gastric submucosal tumor / 대한외과학회지

PURPOSE: The preoperative prediction of malignant potential in patients with gastric submucosal tumors (SMTs) plays an important role in decisions regarding their surgical management. METHODS: We evaluated the predictors of malignant gastric SMTs in 314 patients with gastric SMTs who underwent surgery in Chonnam National University Hospital. RESULTS: The malignant SMTs were significantly associated with age (odds ratio [OR], 1.067; 95% confidence interval [CI], 1.042 to 1.091; P < 0.0001), presence of central ulceration (OR, 2.690; 95% CI, 1.224 to 5.909; P = 0.014), and tumor size (OR, 1.791; 95% CI, 1.483 to 2.164; P < 0.0001). Receiver operating characteristic curve analysis showed that tumor size was a good predictor of malignant potential. The most relevant predictor of malignant gastric SMT was tumor size with cut-offs of 4.05 and 6.40 cm. CONCLUSION: Our findings indicated that age, central ulceration, and tumor size were significant preoperative predictors of malignant SMTs. We suggest that 4 cm be selected as a threshold value for malignant gastric SMTs. In patients with a gastric SMT larger than 4 cm with ulceration, wide resection of the full thickness of the gastric wall or gastrectomy with adequate margins should be performed because of its malignant potential.

Recurring gastrointestinal stromal tumor with splenic metastasis / 대한외과학회지

Malignant gastrointestinal stromal tumors (GISTs) are rare non-epithelial, mesenchymal neoplasms of the gastrointestinal tract that metastasize or recur in 30% of patients who undergo surgical resection with curative intent. A 59-year-old man visited our hospital for an examination of a palpable mass in the left abdomen. Fourteen months prior to his visit, the patient underwent gastric wedge resection to remove a GIST of the gastric cardia. At the time of surgery, no evidence of metastatic disease was observed and the pathological interpretation was a high-risk GIST. A follow-up computed tomography scan of the abdomen revealed a partially necrotic solid mass (9.8 x 7.6 cm) and enhancing mass in the spleen (2.3 cm). On exploration, multiple masses were found in the liver, greater omentum, and mesentery. Here, we report a case of recurring GIST of the stomach that metastasized to the spleen. To the best of our knowledge, few reports of metastasis to the spleen exist.

Clinicopathologic characteristics of serosa-positive gastric carcinoma in elderly patients / 대한외과학회지

PURPOSE: The relationship between the prognosis and the age of patients with gastric carcinoma is controversial. This study examined the clinicopathologic features of elderly gastric carcinoma patients with serosal invasion. METHODS: We reviewed the hospital records of 136 elderly gastric carcinoma patients with serosal invasion retrospectively to compare the clinicopathologic findings in the elderly (aged > 70 years) and young (aged < 36 years). RESULTS: The 5-year survival rates of elderly and young patients with curative resection did not differ statistically (33.9% vs. 43.3%; P = 0.318). Multivariate analysis showed that two factors were independent, statistically significant parameters associated with survival: histologic type (risk ratio, 1.805; 95% confidence interval [CI], 1.041 to 3.132; P < 0.05) and operative curability (risk ratio, 2.506; 95% CI, 1.371 to 4.581; P < 0.01). CONCLUSION: This study demonstrated that elderly gastric carcinoma patients with serosal invasion do not have a worse prognosis than young patients. The important prognostic factor was whether the patients underwent curative resection.

Laparoscopic Total Mesorectal Excision in a Rectal Cancer Patient with Situs Inversus Totalis

Situs inversus totalis is a rare anomaly in which the abdominal and thoracic cavity structures are opposite their usual positions. A 41-yr-old woman, who had an ulcerating cancer on the rectum, was found as a case of situs inversus totalis. We present an overview of the operative technique for the first documented laparoscopic total mesorectal excision of a rectal cancer in the patient with situs inversus totalis. Careful consideration of the mirror-image anatomy permitted a safe operation using techniques not otherwise different from those used for the general population. Therefore, curative laparoscopic surgery for rectal cancer in this patient is feasible and safe.

Initial Experiences with a Laparoscopic Colorectal Resection: a Comparison of Short-term Outcomes for 50 Early Cases and 51 Late Cases

PURPOSE: The present study aimed to investigate the safety and the feasibility of laparoscopic colorectal surgery performed by a surgeon during a learning period. METHODS: Between April and December 2008, 101 consecutive patients with colorectal cancers underwent laparoscopic surgery by one colorectal surgeon who previously had no experience with laparoscopic colorectal surgery. Standard laparoscopy with a lymphadenectomy using a 5-port technique was performed according to the tumor location. The patients were divided into two chronological groups: 50 cases early in learning period (early cases) and 51 cases later in the learning period (late cases). RESULTS: The operations were 29 right hemicolectomies, 9 left hemicolectomies, 18 anterior resections, 35 low anterior resections, 6 intersphincteric resections, 2 abdominoperineal resections, and 2 Hartmann's operation. There were 7 conversions (6.9%). The median operating time was 205 (range, 95-385) min, and the median blood loss was 258 (50-800) mL. The median times to flatus per anus and to feeding of soft diet were 2 (1-5) and 4 (2-13) days, respectively. The median hospital stay was 9 (6-27) days. There were 21 postoperative complications, including 7 anastomotic complications (3 leakages, 3 abscesses, and 1 stenosis). The median number of lymph nodes harvested was 20 (4-65). The operating time, blood loss, and complication rates were significantly decreased in the late group. CONCLUSION: Our initial experience with laparoscopic colorectal surgery appears to have acceptable perioperative results and short-term oncologic outcomes, which improved with the experience of the surgeon.

Gastric Lymphangioma

A gastric lymphangioma is a rare benign lymphatic vascular tumor that contain chylous or serous material within dilated lymphatic cyst. Its pathogenesis is unknown and in most case is incidentally founded by radiological or endoscopic examination. On gastrofiberscopy a submucosal tumor with normal mucosa is found. Endoscopic ultrasonography has recently become an indispensable tool for differentiating these gastric submucosal tumors. Here a case of gastric lymphangioma is reported in a 71 years old woman who presented with intermittent vomiting and epigastric discomfort for six months. The patients underwent a wedge resection of the stomach, and was discharged with no complications, on the sixth post-operation day.