[Duodenal type folicular lymphoma: case report and literature review]. / Linfoma folicular tipo duodenal: reporte de caso y revisión de la literatura.

Duodenal type follicular lymphoma is a rare malignancy accounting for less than 4% of primary non-Hodgkin lymphomas of the gastrointestinal tract and it is a new entity that was recently described in the new update WHO 2016. Data regarding long-term outcome are currently lacking, and for that reason, a consensus on the management of this disease has not been established and treatment. We report a case of a 57-year-old female patient diagnosed with duodenal- type follicular lymphoma grade 3a who was treated with R-CHOP. The aim of this study is to add more data for a greater characterization of the entity and thus select the best management for each case.

[Performance and prognosis assessment of the solid pseudopapillary tumors of the pancreas]. / Evaluación del comportamiento y pronóstico de los tumores sólidos pseudopapilares del pancreas.

INTRODUCTION: Solid pseudopapillary tumors (SPT) of the pancreas are rare neoplasms of low malignant potential that typically affect young women. These are slow-growing lesions and very often reach large size. RESULTS: Between June 2003 and July 2013 24 patients were submitted to surgery. Twenty three (96%) were females with a median age of 32.4 ± 13.2 years old (range 11 to 69 years old). The mean tumor size was 91.3 ± 49 mm (range 30 to 200 mm). The type of procedure performed was duodenopancreatectomy in 9 cases, middle pancreatectomy in 4, distal pancreatectomy in 8, duodenum preserving pancreatectomy in 2 and diagnostic laparoscopy in 1. SPT had a benign anatomopathology and behaviour in 17 cases, while 3 had a carcinoma pattern and 4 developed distant metastases. Median follow up was 58 months (range 5 to 128 months). Recurrence occurred in 4 patients (16.6%) as liver metastases in 2 and carcinomatosis in 2. The overall survival rate at 5 and 10 years was 94% and 63%, respectively. CONCLUSION. SPT are uncommon neoplasms which are mostly benign. However, up to 20% may display a malignant behavior. More studies are needed to investigate predicting factors of malignant potential. The overall survival is high, even after resection of metastases.

[Colonic intussusception by leiomyosarcoma]. / Intususcepción colónica por leiomiosarcoma.

We report the case of female patient, 34 years old, occupation Secretary. BACKGROUND: Polycystic ovary and chronic anemia. No family history of cancer. The patient reported three weeks abdominal pain, fever, bloody loose stools, nausea and vomiting. Abdominal pain is located in flank and right lower quadrant, is colicky, intensity 5 / 10, associated with abdominal distension. On physical examination, vital functions indicated T 38.6 ° FC 98 x min, FR 18 x min, BP 120/80, was awake, she looked pale, in generally fair condition, lucid and oriented. The abdomen was distended, the increased bowel sounds, tympanic to percussion, with tenderness in the right abdomen (more intense in the right iliac fossa), palpable mass is not defined edges lower right quadrant of about 6cm. CLINICAL DIAGNOSIS: abdominal pain syndrome (appendicular mass, intestinal obstruction, intussusceptions). In examinations auxiliars highlighted in 9.1 g of hemoglobin with decreased corpuscular constants. Reviewed by history "rectal bleeding", DRE: yellow stool, no trace of blood, so that colonoscopy was deferred. Reassessed at 24 hours, we decide surgery with a presumptive diagnosis of intestinal obstruction, intussusception. In surgery, we identified a transverse colon tumor (with colo-colonic intussusception) and 10cm of colon was resected and meso tumor: TT anastomosis was performed in transverse colon. The lesion was a tumor of the middle region of the transverse colon, proliferative fibroid appearance, which almost completely obstructed the intestinal lumen, measuring about 7x5cm. The study of pathology with immunohistochemistry indicated that the tumor corresponded to leiomyosarcoma of the colon. Was discharged in good condition. The rarity of this type of malignancy and this type of presentation led us to make this report.

[Gastrointestinal stromal tumors: clinicopathologic and survival evaluation in Rebagliati Hospital]. / Tumores estromales gastrointestinales: evaluación clinicopatológica y sobrevida en el Hospital Rebagliati.

OBJECTIVE: To determine the clinical, radiological, histopathological manifestations and survival of patients with gastrointestinal stromal tumor (GIST) in the National Hospital Edgardo Rebagliati Martins (HNERM) from Lima, Perú. MATERIAL AND METHODS: This is a descriptive and retrospective study, which was based on the medical records of 103 patients with confirmed GIST with immunohistochemical. All the patients were evaluated and treated at the HNERM, from January 2002 until December 2010. RESULTS: In 103 patients between 30 and 88 years the average age was 64 years. The tumor was more frequent in females (52%). The mean disease duration was 7 months. The most frequent form of presentation was gastrointestinal bleeding (48.3%). The diagnosis was made more by endoscopy (50.5%). The prevalence of GISTs by organs was more frequent in stomach (56.3%). The average size of the tumors was 98 mm, 49% had a size between 50 mm and 100 mm, the largest tumor was 260 mm. Tumor stage more frequent was localized (70:9%). GIST associated with another cancer was 9.7% of patients. The predominant histologic pattern was fusiform (73.8%). The 84.5% had low mitotic index. Immunohistochemistry showed expression KIT (CD 117) was 94.17%, CD34 77.5%, Vimentin 96.6%, NSE 84.9%, alpha actin 52.7%, CD56 44.4%, S-100 32.3% and Actin 20%. The tomographic characteristic more frequent was heterogeneous tumor (43.6%).The distribution according to risk classification was: very low risk 3.9%, low risk 28.2, intermediate risk 37.7% and high risk 30.1%. Complete surgical resection was performed in 87.4% of patients and 4.9% of patients received imatinib. The cumulative overall survival at 5 years was 31.07%. In bivariate analysis statistical association was found between surviving with: no presence of cancer associated p = 0.004, CD 34 p = 0.01, low mitotic index p = 0.00 and received surgical treatment p = 0.000. In multivariate analysis one found statistical association of longer survival with smaller tumor size p = 0.015 (CI -3.67, -0.41), localized tumor stage p = 0.036 (CI -5.83, -0.19), lower mitotic index p = 0.038 (CI -0.86, 0.02), asymptomatic patient p=0.009 (CI 1.25, 8.62), no tumor recurrence p = 0.01 (CI -8.49, -1.17), and no metastasis p = 0.001 (CI 2.66, 10.62). CONCLUSIONS: The results of our study were similar to what was reported in international literature. Factors that were associated with longer survival were receiving surgical treatment, patients with smaller tumor size, tumor stage localized, low mitotic index, asymptomatic patient, not tumor recurrence, not metastasis and no cancer associated.

[Relationship between histologic type and location of gastric adenocarcinoma in the Rebagliati Hospital]. / Relación entre tipo histológico y la localización del adenocarcinoma gástrico en el Hospital Rebagliati.

INTRODUCTION: There is epidemiologic evidence that suggest the relation between the histological type and location of gastric adenocarcinoma. Knowing that there is a predominance of Helicobacter pylori infection in the antral region and this is considered an environmental factor; make us suppose that there is a relation among intestinal type and distal location. OBJECTIVE: The aim of this study is to investigate the relation among histological type and location of gastric cancer, using the Lauren classification and the Japanese Gastric Cancer Association classification. METHOD: During the period between January 1st 2007 and December 31th 2010, 460 patients with the proven diagnostic of adenocarcinoma were admitted for surgical treatment at the gastric cancer specialized ward of Rebagliati National Hospital, Lima, Peru. RESULTS: Female was more frequent in diffuse type (39% vs. 33%; p: 0,153), the mean age among intestinal type is greater than diffuse type (70,7 vs. 62,6 años; p<0,001). There is association among poorly differentiated with upper location (22% vs. 12,7%; p = 0,009), signet cell with middle location (50% vs. 32,5%; p: 0,006), tubular type with distal location (57,6% vs. 42,8%; p: 0,002), intestinal type with distal location (58,3% vs. 44,1%; p: 0,004), and diffuse type with upper location (19,3% vs. 12,5%; p: 0,049). CONCLUSION: Adenocarcinomas histologically differentiated or intestinal type are associated with distal location. Poorly differentiated type and signet ring cell type are associated with upper and middle location respectively.

[Celiac disease and intestinal obstruction by T cell lymphoma]. / Enfermedad celiaca y obstrucción intestinal por linfoma de células T.

A male patient, 55 years old, born in Ayacucho, with Spanish ancestors, was hospitalized through emergency referring abdominal pain, and 10 kilograms weight loss. Six months before he was diagnosed as having irritable bowel syndrome. His previous diseases were rheumatoid arthritis and intolerance to lactose. Laboratory results were: Hb 12 gr./dL, white cells 5200 per mm3, albumin 2.7 gr./dL, erythrocyte sedimentation rate 32 mm/hr., and tumor markers were negative. Radiographic study of the small bowel showed barium fragmentation, and a focal dilation in distal jejunum. Chest X-ray and CT scan of thorax, abdomen and pelvis were normal. Colonoscopy was normal for colonic mucosa, but in ileum it showed an irregular mucosa, little nodules and fewer folds than usual. Biopsy from ileum demonstrated unspecific inflammation. Upper endoscopy showed gastritis, a duodenum scar ulcer and an irregular mosaic pattern pink and white. Duodenum biopsy demonstrated short villi, chronic inflammation and an increase in the number of intraepithelial lymphocytes, all these was consistent with celiac disease Marsh 3. Antibodies anti-endomisium and anti-transglutaminase were positive. After some days he developed signs of bowel obstruction and was operated.

Endoscopy Ultra- Sonography -guided biliary drainage in the surgical -endoscopy era.

BACKGROUND: US-guided hepatico - gastrostomy, choledocho-duodenostomy and choledocho-antrostomy are advanced procedures on biliary and pancreatic endoscopy and together make up the echo-guided biliary drainage. Hepatico - gastrostomy is indicated in cases of hiliar obstruction, while the procedure of choice is choledocho - duodenostomy in distal lesions. Both procedures must be done only after unsuccessful ERCP. AIMS: To clarify to the readers about indication of these procedures, they must be made under a multidisciplinary view while sharing information with the patient or legal guardian. METHODS: All series cases report and selected cohort studies were selected according to the DDTS system in which key words were EUS biliary drainage, choledocho-duodenostomy, hepatico-gastrostomy, EUS, palliation and pancreatic biliary advanced cancer. RESULTS: Separately it was stated definition on the EUS biliary drainage procedures and it includes the techniques details and critical analysis. CONCLUSION: Hepatico- gastrostomy and Choledocho- duodenostomy are feasible when performed by endoscopists with expertise in bilio pancreatic endoscopy and advanced echo-endoscopy and should be performed currently under rigorous protocol in educational institutions.

[Early gastric cancer surgically treated at Rebagliati Hospital: study of 76 cases during 5 years]. / Cáncer gástrico temprano operado en el Hospital Rebagliati: estudio de 76 casos en el quinquenio 2004-2008.

This report describes the characteristics of early gastric cancer surgically treated in the Gastric Cancer Unit at Rebagliati National Hospital between January 2004 and December 2008. Mean age was 68 years; males, distal location, submucosa infiltration and intestinal histological type predominate in these patients. Lymph node involvement was 13%.

[Colonic histoplasmosis as a diagnostic manifestation of AIDS]. / Histoplasmosis colónica como manifestación diagnóstica de SIDA.

We report the case of 48 year old female patient without a history of significance importance.(refuses blood transfusion). She complaint of diarrhea of four months of duration and weight loss of 8 kg. she added episodes of hematochezia and severe anemia requiring transfusion. An intrahemorrhagic colonoscopy was performed detecting three ulcerated lesions. First at 10 cm from the anus, one in transverse colon distal, another similar ulcer in the proximal transverse The biopsies showed ulcer granulation tissue, abundant macrophages with intracytoplasmic structures consistent with histoplasmosis. Tests showed no tuberculosis or intestinal parasitosis. HIV testing (ELISA and Western Blot) were positive. The CD4 (78 cells) and extrapulmonary histoplasmosis were the criteria defined stage AIDS. The extrapulmonary histoplasmosis defines stage IV in immunosuppressed patients with HIV. Lower gastrointestinal bleeding colonic ulcer secondary to Histoplasma is a rare form presentation as a diagnostic manifestation of AIDS.

Spontaneous regression of a breast carcinoma: a case report.

Spontaneous regression of malignant tumors is a rare event. It is defined as partial or total disappearance of a proven malignant tumor without adequate medical treatment. The causes of this phenomenon are various. Nevertheless, malignant tumors do regress occasionally for no apparent reason, as evidenced by many clinical observations. We report a case of a 68-year-old woman, who was presented with a several-month history of a painless firm lump, initially of 1 cm in diameter and growing to a large solid regular tumor of 2.5 x 2.5 cm in size, in the upper outer quadrant of her right breast. Preoperative histopathological diagnosis revealed ductal invasive carcinoma. Later on, while awaiting surgical treatment, she suffered an arm injury requiring a 1-month delay of surgery. After recovery, on the date of surgery the tumor disappeared, and, in addition, it was not found in tissue specimens obtained from quadrantectomy. After 78 months of follow-up there was no evidence of relapse. In this report, we discuss clinical and histopathological findings, patient management and possible mechanisms of cancer regression.

Effect of Ki-67 assessment in the distribution of breast cancer subtypes: Evaluation in a cohort of Latin American patients.

Breast cancer (BC) is a heterogeneous disease composed of four main subtypes with distinct clinical and epidemiological features. Although several reports have described the distribution of BC subtypes in Latin America, the majority of them have not included the cellular marker, Ki-67, in the immunohistochemical (IHC) panel. The aim of the present study was to describe the distribution of BC subtypes in a cohort of Latin American women using an IHC panel with Ki-67. A prospective cohort of 580 patients in three centers of Peru (the Hospital Nacional Edgardo Rebagliatti Martins, the Hospital Nacional Guillermo Almenara Irigoyen, the Hospital Nacional Alberto Sabogal, Lima) and one in Uruguay (Instituto Nacional del Cáncer, Montevideo) were evaluated. BC phenotypes were classified according to an IHC panel: Estrogen receptor (ER), progesterone receptor (PgR), HER2 and Ki-67. Silver in situ hybridization was used when the HER2 status, as determined by IHC, was equivocal. The associations between the BC phenotypes and their clinicopathological features were evaluated. ER was positive in 65% of the cases (n=377), and PgR in 50% (n=203). In total, 79.1% (n=459) were HER2-negative, 19.8% (n=115) were HER2-positive and 1% (n=6) had an equivocal status. With respect to Ki-67, 44.7% of the patients exhibited staining in >14% of the tumor cells (n=259). The distribution of subtypes was as follows: Luminal A, 31.9% (n=183); luminal B, 35% (n=201); HER2, 12.1% (n=70); and triple-negative, 20.9% (n=120). When Ki-67 was not included in the panel, the frequency of luminal A was 41.1% and luminal B, 25.8% (9.2% of the cases were misclassified). Ki-67 was most highly expressed in triple-negative and HER2 tumors. Inclusion of Ki-67 in the IHC panel to assign subtypes revealed a higher frequency of luminal B tumors than was reported previously for Latin American women with BC, whereas the distribution of triple-negative and HER2 tumors were similar to that previously reported. In conclusion, these results demonstrated that excluding Ki-67 from the panel of IHC markers may lead to an underestimation of the rates of luminal B tumors.

Large B-cell lymphoma arising in cardiac myxoma or intracardiac fibrinous mass: a localized lymphoma usually associated with Epstein-Barr virus?

Primary cardiac neoplasms are rare. However, among them, cardiac myxoma is the most common tumor. In contrast, primary cardiac lymphoma within a cardiac myxoma is extremely rare and might be difficult to diagnose because of non-specific clinical manifestations. We report the case of a previously healthy 52-year-old man who presented with acute onset of transient dysarthria and left hemiplegia. A transthoracic echocardiography showed a 6×2.5-cm solid mass in the left atrium, which was subsequently resected. Histological, immunohistochemical, and molecular analyses revealed an EBV-associated CD30-positive large B-cell lymphoma with anaplastic morphology within a cardiac myxoma and fibrinous material. Staging studies showed no evidence of lymphoma elsewhere. The patient achieved complete remission and is alive 42 months after diagnosis, and did not receive chemotherapy. We discuss the clinical and pathologic features of lymphoma arising in cardiac myxoma or in intra-atrial fibrinoid mass and the potential role of IL-6 in its pathogenesis.

First report of a human case of polycystic echinococcosis due to Echinococcus vogeli from neotropical area of Peru, South America.

We report a human case of polycystic hidatidosis due to Echinococcus vogeli from Contamana (Department of Loreto) village located in the central jungle of Peru. The patient is a 44 year-old lady, teacher, who carried a painless liver mass since a year ago. She was submitted to abdominal surgery and the liver mass was removed and showed multiple cysts containing colorless liquid as is showed in the polycystic hidatidosis. The morphology and measure of the hooks obtained from the liquid contained in the cysts are from Echinococcus vogeli. It is the first report of this parasitism in Perú.

A primary cardiac osteosarcoma: Case report and review of the literature.

Primary cardiac osteosarcoma is a rare and aggressive neoplasm that can be difficult to diagnose. We report a case of a previously healthy 49-year-old woman who presented with dyspnea, atrial flutter, and heart failure. A mass was visualized in her left atrium by echocardiography and cardiac computed tomography, and the diagnosis of cardiac myxoma was raised. The patient subsequently underwent surgical resection of the mass and atrial reconstruction. Surprisingly, histological and immunohistological analyses revealed the mass to be an osteosarcoma. The patient received chemotherapy and radiotherapy. Eight months later, she has shown evidence of local recurrence. We briefly discuss primary osteosarcomas in the cardiac cavity and their management. .

[Clinical, endoscopic and histologic profile of the Gastrointestinal Stromal Tumours in the Rebagliati Hospital]. / Perfil Clínico, Endoscópico e Histológico de los Tumores Estromales Gastrointestinales en el Hospital Rebagliati.

INTRODUCTION: Gastrointestinal Stromal Tumors (GIST) are lesions which origin from Intersticial Cells of Cajal that may be asymptomatic or cause complications like digestive bleeding or malignant transformation. AIM: To determine the clinical, endoscopic and histological profile, as well as the main demographic features of patients with GIST in Hospital Edgardo Rebagliati (Lima-Perú) from January 2002 to December 2004. METHODS: Descriptive, transversal and retrospective study in which we reviewed clinical and anatomopathological archives from 34 patients with GIST during the above mentioned period. The collected data were placed on a sheet of recollection. RESULTS: There was male predominance (58.82%).The most affected age group was 71-80 years old (26.47%). The average age was 64.7 years old. The most frequent clinical presentation was abdominal pain (47.06%) followed by melena (44.12%). Diagnosis was made by endoscopic method in 58.82%. The main histological type was spindle (47.06%). There was high risk of malignancy in 50% and the most often involved site was stomach (61.77%). Endoscopicall the characteristic image was a submucosal tumor with ulceration, the average size was 6.44 cm. There was significant statistical relation (p<0.05) between endoscopic method and melena. CONCLUSION: Patients with GIST in HNERM are mostly men, older than 60 years that come with abdominal pain and melena, being endoscopy the best method to diagnose if patients present melena. Predominating histology was fusiform.

[Malignant peritoneal mesothelioma]. / Mesotelioma Peritoneal Maligno.

The peritoneal mesothelioma is a rare pathology with unspecific symptoms reason to be a difficult diagnosis. We report a case of a 58 year old man with diabetes mellitus type 2, arterial hypertension and smoking; without precedent of asbestos exposure. The patient presented a one month history characterized by progressive increase of the abdominal volume and sensation of fullness; three weeks later they added breathlessness and hyporexia. The patient was in regular general condition; he was not presenting hepatic stigmas, edema or adenomegalies. The examination of thorax and cardiovascular it was normal. The abdomen distended by ascites, not painful, liver and spleen not examined. Laboratory: Hemoglobin 11,9 gr/dl, WBC 6840/mm3 Bands 1 %, lymphocytes 10 %, platelets 620000/mm3, PT 12 seconds, PTT 34 seconds, glucose 158 mg/dl, BUN 20,5 mg/ dl, creatinine 1,2 mg/dl, proteins 6,1 gr/dl, albumin 2,6 gr/dl. LDH 316 U/l, beta2microglobulin 2,2 mg/l (0.83-1.15 mg/l). HBV and HCV negative. Ca 19.9, CEA, AFP and PSA negative. Hemocultive negative. Ascitic fluid: ADA 20,3 U/l, serum-ascitic albumin gradient (SAAG) 1,1. Leukocytes 2237 cells/mm3, PMN 6 %, lymphocytes 90 %, mesothelial cells 4 %, proteins 4,6 gr/dl, albumin 2,34 gr/dl, glucose 44 mg/dl, LDH 1918 U/l. Gram and cultive: negatives. BAAR and cultive: negative . Cytology: mesothelial cells with changes of type reagent, Block cell for tumour cells: negative. Abdominal US: increased peritoneum and abundant ascitic fluid. Thoracic-abdominal CT: left side pleural effusion, severe ascites with thick epyplon. Upper GI endoscopy: moderate gastritis. Colonoscopy: two small sessile polyps in sigmoid colon. The finds of the laparoscopy were interpreted like carcinomatosis or peritoneal tuberculosis. The report of the peritoneal biopsy was informed as suggestive of undifferentiated carcinoma; the reappraisal with inmunohystochemic (calretinin +,cytokeratin +, vimentin +) indicated malignant peritoneal mesothelioma, type epithelial. The evolution was torpid. The patient was transferred to the Service of Oncology where they initiated chemotherapy with Cysplatin (CDDP) and died 20 days later. The malignant mesothelioma peritoneal is a unfrequent entity, with limited therapeutic options; generally detected late, with a palliative treatment.

Epstein-Barr virus as a prognostic factor in de novo nodal diffuse large B-cell lymphoma.

Although the International Prognostic Index (IPI) score is a valuable prognostic tool in diffuse large B-cell lymphoma (DLBCL), other risk-stratifying factors may be of value. The aim of this study was to define the prognostic value of EBV expression in de novo nodal DLBCL. Seventy-four cases were selected between January 2002 and December 2007. Clinical data were reviewed and tissue samples were evaluated for expression of CD20, CD10, bcl-6, MUM1, and EBV-encoded RNA (EBER). Of 74 evaluated cases, 53 cases (72%) were of non-germinal center-like subtype and 11 cases (15%) were positive for EBER. In a univariate analysis of the 57 patients who received chemotherapy, factors associated with survival were EBV status, performance status, LDH level, and IPI score. Using a multivariate analysis, a prognostic model was developed using IPI score and EBV status, which showed statistical significance. Our study supports EBV status as a powerful prognostic factor in de novo nodal DLBCL. Prospective studies should be carried to validate this hypothesis.

[Corticosteroid refractory colonic Crohn disease with successful remission with infliximab]. / Remisión de Crohn colónico refractario a corticoides con Infliximab.

We review the case of a 14 year old patient complaining of 5 months of bloody and mucous diarrhea, abdominal pain, fever and 10 kg weight loss. At the beginning she received cotrimoxazole and then chloramphenicol with no success. With the suspicious of tuberculosis she was treated for a month with the corresponding drugs with no clinical improvement. Colonoscopy revealed the presence of punch - like ulcers, deep linear ones cobblestoning and skip lesions. The histological analysis showed severe distortion the colonic mucosa, ulcers, granulation tissue, lymphoid follicles and a trend towards the formation of granulomatous lesions. The clinical, endoscopic and histological features were consistent with Crohn disease. The activity index for it was greater than 450. The patient received 60 mg bid hydrocortisone but switched to 20 mg bid methylprednisolone at day 10th. After 10 days and because she was doing worst refractoriness to corticoids was considered and 5 mg / kg Infliximab was started. At the third day of treatment symptoms improved dramatically and one week later was almost asymptomatic. Similar dosage of Infliximab was repeated at weeks 2, 6 and 8. Currently the patient is being treated with 75 mg azathioprine as maintenance therapy.

Intususcepción colónica por leiomiosarcoma / Colonic intussusception by leiomyosarcoma

Reportamos el caso de una paciente mujer de 34 años, secretaria, con historia de anemia crónica y ovario poliquístico; sin historia familiar de cáncer. La paciente refería desde tres semanas antes del ingreso: náusea, vómito, dolor abdominal, fiebre y deposiciones sueltas con sangre. El dolor abdominal estaba localizado en flanco y fosa iliaca derecha, era tipo cólico, de intensidad 5/10 y asociado a distensión abdominal. En el examen clínico las funciones vitales indicaban T 38,6 °, FC 98 x min, FR 18 x min y PA 120/80; estaba despierta, lucida, pálida, en regular estado general. El abdomen estaba distendido, los ruidos hidroaéreos aumentados, timpánico a la percusión y con dolor a la palpación en hemiabdomen derecho (más intenso y con rebote positivo en fosa iliaca derecha); se palpaba masa de bordes no definidos en cuadrante inferior derecho, de aproximadamente 6cm. Diagnóstico clínico: Síndrome doloroso abdominal (¿plastrón apendicular, obstrucción intestinal: intususcepción?). En los exámenes auxiliares resaltaba la hemoglobina en 9,1 gr, con las constantes corpusculares disminuidas. El tacto rectal fue negativo, por lo que la colonoscopia fue diferida. Reevaluada a las 24 horas se decide cirugía. Se identificó una tumoración de colon transverso (con intususcepción colo-colónica), se resecó 10cm de colon y meso de tumoración; se realizó anastomosis T-T de colon transverso. La lesión era una tumoración proliferativa de 7x5 cm, que obstruía la luz del intestino casi totalmente. El estudio de anatomía patológica con inmunohistoquímica indicó que la lesión invaginada correspondía a un leiomiosarcoma de colon. Salió de alta en buenas condiciones. La rareza de éste tipo de neoplasia maligna de colon y lo esporádico de este tipo de presentación, nos indujo a realizar el presente reporte.

We report the case of female patient, 34 years old, occupation Secretary. Background: Polycystic ovary and chronic anemia. No family history of cancer. The patient reported three weeks abdominal pain, fever, bloody loose stools, nausea and vomiting. Abdominal pain is located in flank and right lower quadrant, is colicky, intensity 5 / 10, associated with abdominal distension. On physical examination, vital functions indicated T 38.6 ° FC 98 x min, FR 18 x min, BP 120/80, was awake, she looked pale, in generally fair condition, lucid and oriented. The abdomen was distended, the increased bowel sounds, tympanic to percussion, with tenderness in the right abdomen (more intense in the right iliac fossa), palpable mass is not defined edges lower right quadrant of about 6cm. Clinical diagnosis: abdominal pain syndrome (appendicular mass, intestinal obstruction, intussusceptions). In examinations auxiliars highlighted in 9.1 g of hemoglobin with decreased corpuscular constants. Reviewed by history “rectal bleeding”, DRE: yellow stool, no trace of blood, so that colonoscopy was deferred. Reassessed at 24 hours, we decide surgery with a presumptive diagnosis of intestinal obstruction, intussusception. In surgery, we identified a transverse colon tumor (with colo-colonic intussusception) and 10cm of colon was resected and meso tumor: TT anastomosis was performed in transverse colon. The lesion was a tumor of the middle region of the transverse colon, proliferative fibroid appearance, which almost completely obstructed the intestinal lumen, measuring about 7x5cm. The study of pathology with immunohistochemistry indicated that the tumor corresponded to leiomyosarcoma of the colon. Was discharged in good condition. The rarity of this type of malignancy and this type of presentation led us to make this report.

[Primary colorectal lymphoma of diffuse large B-cells: an experience at a general hospital]. / Linfoma de células grandes B difuso primario colorectal: experiencia en un hospital general.

Primary colorectal lymphoma is a very rare disease. Primary colorectal lymphoma of diffuse large B-cells is a more frequent subtype representing 1% of all colon diseases. In a retrospective study, the clinical characteristics and treatment course of primary colorectal lymphoma of diffuse large B-cells between 1997 and 2003 were reviewed. According to Dawson's criteria, fourteen cases were identified. The average age was 65 and the ratio of men to women was 1:3. The most frequent signs and symptoms were abdominal pain (78%), diarrhea (49%) and abdominal tumor (35%). The most frequently involved regions were the cecum (42%), ascending colon (21%) and rectum (21%). Six were in Stage I, four in Stage II and four in Stage III. The 5-year survival per stage was 26, 11 and 5 months, respectively. Primary colorectal lymphoma of diffuse large B-cells usually affects the right part of the colon in an aggressive manner.