Comparison of the efficacy of irsogladine maleate and famotidine for the healing of gastric ulcers after Helicobacter pylori eradication therapy: a randomized, controlled, prospective study.

OBJECTIVE: Helicobacter pylori eradication therapy alone cannot heal gastric ulcers in Japanese patients. Irsogladine has previously been shown to accelerate the healing of gastric ulcers after H. pylori eradication therapy. And we previously reported that histamine H(2) receptor antagonists inhibit gastric ulcer relapse after H. pylori eradication therapy. We therefore compared the efficacy of irsogladine with famotidine as appropriate treatments for ulcers after eradication therapy. METHODS: Gastric ulcer patients with H. pylori infection (n = 119) were randomized to treatment with irsogladine 4 mg/day (n = 60) or famotidine 40 mg/day (n = 59) following 1-week H. pylori eradication therapy. After treatment, assessments of gastric ulcer healing were performed. RESULTS: The ulcer healing rates in patients receiving irsogladine and famotidine were 85.2% (46/54) and 79.6% (43/54), respectively, and were not significantly different (p = 0.4484). In the famotidine group, the healing rate was significantly lower in patients who drink alcohol than in those who do not (60.0% vs. 91.2%; p = 0.0119). However, in the irsogladine group the healing rate did not differ between patients who drink alcohol and those who do not. Furthermore, the healing rate in smokers was significantly higher in the irsogladine group (88.0%) than in the famotidine group (59.1%) (p = 0.0233). CONCLUSIONS: Irsogladine and famotidine are both acceptable in treatment after H. pylori eradication therapy in gastric ulcer patients. Findings also suggest that irsogladine is more beneficial than famotidine in patients who drink alcohol and smoke.

Pulmonary myoepithelial carcinoma resembling matrix-producing carcinoma of the breast: case report and review of the literature.

We report a case of pulmonary myoepithelial carcinoma with extensive myxohyaline stroma, resembling matrix-producing carcinoma of the breast. A 76-year-old Japanese man presented with a nodular lesion in the left lung (S8), and underwent partial resection of the left lower lobe. Microscopically, the resected tumor was relatively well circumscribed with central hypocellular myxohyaline and peripheral hypercellular area. In the central area, eosinophilic and clear polygonal cells proliferated in a cord-like or reticulated pattern with extensive myxohyaline stroma, while the peripheral area was composed of solid lobules of different shapes and sizes with occasional comedonecrosis. The tumor cells were markedly atypical with frequent mitotic figures. Vascular and lymphatic invasion was evident with regional lymph node metastasis. No squamous or glandular differentiation was evident in the tumor. Immunohistochemical staining implied myoepithelial differentiation. The patient developed multiple brain metastases, and died of the disease 11 months after the surgery. In this report, we discuss the histopathologic uniqueness of the present case together with a review of the literature.

Pancreatic injury successfully treated with endoscopic stenting for major pancreatic duct disruption.

We present a 43-year-old Japanese man with major pancreatic duct disruption caused by blunt pancreatic head damage. Computed tomography (CT) revealed pancreatic head injury, and endoscopic retrograde pancreatography showed pancreatic duct disruption at the injury site along with contrast media leakage. We placed a pancreatic stent for 3 months, after which closure of the pancreatic duct fistula was confirmed. CT on the 9th hospital day showed acute pancreatic fluid collections, but these had disappeared at the 3 month follow-up CT. The patient has remained asymptomatic at follow-up for 3 years.

Evaluation of esophageal function in patients with gastroesophageal reflux disease using transnasal endoscopy.

BACKGROUND AND AIMS: To investigate the utility of a new method of carrying out esophageal manometry using a narrow gauge manometry catheter via a transnasal endoscope. METHODS: The Frequency Scale for the Symptoms of gastroesophageal reflux disease (GERD) (FSSG), a GERD-specific questionnaire, was given to 45 subjects. Subjects underwent transnasal endoscopy with three dry and three wet (3 mL water) swallows. Direct observations of the primary peristaltic wave and peristaltic pressure measurement were conducted simultaneously. RESULTS: Endoscopic observation of lower esophageal motility associated with swallowing revealed dilatation of the esophageal lumen after swallowing, followed by contraction in association with the primary peristaltic wave. The peristaltic pressure was significantly lower with increased FSSG scores for dry swallows (r = -0.347, P = 0.0212), but no significant correlation was seen for wet swallows. CONCLUSIONS: The significant negative correlation between reflux symptoms and peristaltic pressure in dry swallows was thought to be that reduced pressure immediately rostral to the lower esophageal sphincter leads to decreased clearance following gastric acid reflux, playing a large part in the onset of symptoms.

Sitafloxacin activity against Helicobacter pylori isolates, including those with gyrA mutations.

Sitafloxacin showed MICs of less than or equal to 0.5 microg/ml against 105 isolates of Helicobacter pylori, including 44 isolates with mutations in the gyrA gene. The highest MICs for garenoxacin and levofloxacin were 8 and 64 times, respectively, higher than the highest MICs observed for sitafloxacin.

Helicobacter pylori and NSAID-induced gastric ulcer in a Japanese population.

A recent meta-analysis by Huang et al. clarified that Helicobacter pylori infection and nonsteroidal antiinflammatory drugs (NSAIDs) are important factors for peptic ulcer. The results showed that the risk for ulcer in NSAID(+)/H. pylori(+) patients was 61.1 fold higher when compared with NSAID(-)/H. pylori(-) patients. Some gastric ulcers detected in patients on NSAID therapy may actually be caused by H. pylori, but it is difficult to differentiate NSAID-induced gastric ulcer from H. pylori-induced gastric ulcer. Several studies have investigated the effects of H. pylori eradication on ulcer healing. One study reported that H. pylori eradication actually lowered the healing rate of gastric ulcers. Because there have been no studies finding that H. pylori eradication facilitates healing, H. pylori eradication is not recommended for NSAID users. Concerning the efficacy of H. pylori eradication in the prevention of NSAID-induced gastric ulcer, a meta-analysis concluded that among all patients on NSAID therapy, H. pylori eradication lowered the prevalence of ulcer, which was particularly marked in NSAID-naïve patients. When compared with those of proton pump inhibitors (PPIs), the preventative effects of H. pylori eradication were inferior. In Japan, national health insurance does not cover procedures that prevent or lower the risk for NSAID-induced ulcer. When administering NSAID to patients with risk factors, it is desirable to administer antiulcer agents.

Merkel cell carcinoma co-existent with sebaceous carcinoma of the eyelid.

Merkel cell carcinoma is occasionally associated with other types of cutaneous malignancies including squamous cell carcinoma, basal cell carcinoma and lentigo maligna. We report a case of Merkel cell carcinoma co-existent with sebaceous carcinoma in the right upper eyelid of a 61-year-old Japanese man. Histopathologically, the resected tumor consisted of three nodules located in the tarsal plate, showing two distinct histopathological types. Two nodules were Merkel cell carcinoma and located in the proximal part of the palpebral conjunctiva. The third was sebaceous carcinoma located in the distal transitional zone between the epidermis and the conjunctiva. No features of transition between these two components were noted. Metastatic deposits were identified in the regional lymph nodes, which solely consisted of Merkel cell carcinoma without sebaceous carcinoma. This is the first report of such co-existent lesions.

A case of sebaceoma with extensive apocrine differentiation.

Apocrine differentiation is a rare event in sebaceoma, and only 3 cases have been reported. We report a case of sebaceoma with extensive apocrine differentiation on the scalp in a 73-year-old Japanese woman. The resected tumor was located entirely within the dermis and subcutis as a well-circumscribed, lobulated, solid, and partially cystic mass, measuring 35 mm at the largest diameter. Histopathologically, it was composed of uniform basaloid cells with clusters of sebocytes, squamous islands of ductal structures, and apocrine cells with apparent decapitation secretion. Nuclear atypia of all types of cells was inconspicuous, and mitotic figures were infrequent. We considered the lesion to be a sebaceoma with apocrine differentiation.

Mutational analysis of Wnt signaling molecules in ameloblastoma with aberrant nuclear expression of beta-catenin.

BACKGROUND: To clarify the genetic background of ameloblastoma, expression of beta-catenin, and mutational status of genes involved in Wnt signaling pathway were investigated. METHODS: We analyzed beta-catenin and cyclin D1 in 18 cases of ameloblastoma by immunohistochemical staining, and searched for mutations in CTNNB1 (gene for beta-catenin), APC, AXIN1, and AXIN2 by polymerase chain reaction (PCR) and direct sequencing method. RESULT: We detected membranous and occasionally cytoplasmic expression of beta-catenin in 16 of 18 cases (89%), and nuclear expression of beta-catenin principally in the peripheral columnar cells in 11 of 18 cases (61%). In nine of the 18 cases (50%), we detected the expression of cyclin D1 principally in the peripheral columnar cells. However, there was no correlation between nuclear expressions of beta-catenin and cyclin D1. No missense mutations were found in CTNNB1, APC, AXIN1, and AXIN2 in all cases except for silent mutation and already-known single nucleotide polymorphism. CONCLUSION: Mutations in CTNNB1, APC, AXIN1, and AXIN2 are not implicated in nuclear accumulation of beta-catenin, and that the expression of cyclin D1 is accelerated independently of beta-catenin in ameloblastomas. Other Wnt signaling members or alternative pathways involved in the degradation of beta-catenin should be subject of further investigation.

Human intestinal spirochetosis in Japan; its incidence, clinicopathologic features, and genotypic identification.

Human intestinal spirochetosis is a common condition in Western countries, but is not well recognized in Japan. To demonstrate the incidence and clinicopathologic findings of human intestinal spirochetosis in Japan, we retrospectively investigated biopsy, and endoscopically or surgically resected specimens of the large intestine. Among a series of 2556 samples, 11 cases of human intestinal spirochetosis were detected (0.4%). Together with additional nine cases sporadically found, 20 cases of human intestinal spirochetosis were subjected to molecular detection of two strains of spirochetes (Brachyspira aalborgi and Brachyspira pilosicoli) by amplifying species-specific portion of 16S ribosomal RNA and NADH oxydase gene by polymerase chain reaction. B. aalborgi was detected in all cases examined, three of which revealed dual infection of both species. Our results suggest that human intestinal spirochetosis infection is relatively rare, and B. aalborgi is the most prevalent species in Japan. Most of human intestinal spirochetosis were asymptomatic, although symptomatic in exceptional cases. In addition, we emphasize a usefulness of immunostaining with anti-Treponema pallidum and anti-Mycobacterium bovis polyclonal antibodies for detecting the spirochetes.

A case of cutaneous myoepithelial carcinoma.

BACKGROUND: Cutaneous myoepithelioma, both benign and malignant, is a rare neoplasm composed of neoplastic myoepithelial cells showing diverse histopathological features, and criteria for discriminating benign or malignant have not been fully clarified. PATIENT: We present a case of cutaneous myoepithelial carcinoma in a 62-year-old woman presenting a solid mass in the right back. RESULTS: Resected tumor was located in the whole dermis and subcutis. Histopathologically, two different growth patterns were noted: a small-nested or trabecular pattern in the superficial part and a large nodular pattern with extensive central necrosis in the deep part. Tumor cells were all epithelioid, although plasmacytoid and glycogen-rich clear cells were also observed within the large nodules of the deep part. Immunohistochemically, the cells were positive for both epithelial and myogenic markers, suggesting myoepithelial origin. Lymphatic invasion and lymph node metastasis were evident despite inconspicuous atypia and low mitotic rate. CONCLUSION: The final diagnosis was cutaneous myoepithelial carcinoma. At present, it seems to be difficult to predict the behavior of myoepithelioma of the skin and soft tissue, although atypia and high mitotic rate are reported to be associated with local recurrence and metastasis.

Carcinosarcoma ex recurrent pleomorphic adenoma of the submandibular gland.

We report a case of carcinosarcoma ex recurrent pleomorphic adenoma in the submandibular region of a 56-year-old Japanese man. He presented with a 2-year history of a rapidly growing mass in the submandibular region. He reported undergoing excision of a nodule in the same region 10 years earlier. Incisional biopsy confirmed the diagnosis of pleomorphic adenoma. The lesion was excised surgically. The resected tumor measured 40 x 20 mm and was composed of two large nodules and multiple small satellite nodules in the subcutaneous tissue. Histopathologically, one large nodule was carcinosarcoma while the other large nodules and small satellite nodules were pleomorphic adenoma. The former large nodule showed a variegated pattern with carcinomatous components (poorly differentiated adenocarcinoma, salivary duct carcinoma, squamous cell carcinoma and undifferentiated carcinoma) and sarcomatous components (spindle cell sarcoma, chondrosarcoma, liposarcoma and rhabdomyosarcoma). Based on the clinical history and histopathology, we consider the lesion to have originated from recurrent pleomorphic adenoma.

Solitary fibrous tumor of the thyroid gland: report of two cases and review of the literature.

Presented herein are the first two Japanese cases of solitary fibrous tumor (SFT) of the thyroid gland. The patients were 64- and 41-year-old men, who underwent hemithyroidectomy for thyroid tumors. Histopathologically, the tumors were well circumscribed, and were composed of spindle cells, collagen bundles and entrapped thyroid follicles. Spindle cells and collagen bundles were mostly in a patternless arrangement with an admixture of hypo- and hypercellular areas. Proliferating spindle cells were bland, slender, and occasionally wavy without any atypia and increased mitotic figures. Immunohistochemically, they were strongly positive for CD34, CD99, and bcl-2, but negative for epithelial membrane antigen, keratin, thyroglobulin, calcitonin, thyroid transcription factor-1, alpha-smooth muscle actin, desmin, S-100 protein and CD117. Based on these findings, the two patients were diagnosed as having thyroid SFT. Neither local recurrence nor metastasis has been observed in 5 years in patient 1 or in 4 years in patient 2. Thyroid SFT is extremely rare, and only 20 cases have been reported in the English-language literature including hemangiopericytoma. Although recurrence or metastasis has not been described in any reported cases, the clinical behavior of SFT is still undetermined, therefore long-term follow up seems necessary at present.

Florid cystic endosalpingiosis of the spleen.

A case of endosalpingiosis appearing as a huge multilocular cyst in the spleen of a 31-year-old woman is reported. The cystic lumens were smooth, and lined by fallopian tubal epithelium containing ciliated and secretory cells. The epithelial lining showed neither atypia nor foci of papillary proliferation, with only 3-5% MIB-1 labeling index. The epithelial lining was histochemically negative for mucin, but positive for MUC1 and progesterone receptor. Despite the appearance of a tumor-like mass, it was diagnosed as florid cystic endosalpingiosis as there was a normal tube-like epithelium. Regarding etiology, it was considered to derive from the secondary müllerian system of the splenic capsule.

Duodenal gangliocytic paraganglioma treated with endoscopic hemostasis and resection.

Gangliocytic paragangliomas are exceedingly rare tumors that arise in close proximity to the papilla of Vater. There are few reports of the endoscopic resection of duodenal gangliocytic paraganglioma. A 61-year-old woman was admitted with a complaint of melena. Endoscopic examination revealed a pedunculated submucosal tumor with erosion in the third portion of the duodenum. Hemostasis, using a gold probe, was performed. Nine days later, we successfully resected the tumor, using endoscopic polypectomy. To determine the depth of tumor invasion, endoscopic ultrasonography was used. The size of the tumor was 3.0 x 2.5 x 1.0 cm. A total of 25 cases of duodenal gangliocytic paraganglioma have been reported in Japan. Generally, this tumor is considered benign. However, resection was performed in many patients because preoperative diagnosis was impossible. In Japan, no previous studies have reported using endoscopic hemostasis, to our knowledge. Our patient is the fourth in Japan to be treated by endoscopic resection. We report on our patient, with a review of the literature.