Tumor de GIST, presentación no habitual / GIST tumor: an unusual presentation

RESUMEN El tumor estromal gastrointestinal representa el 3% de las neoplasias gastrointestinales; es el tumor mesenquimático más frecuente. Afecta a hombres mayores de 50 años. El 80% son benignos, la mayoría afectan el estómago e intestino delgado. La incidencia de localización extragastrointestinal es desconocida. Paciente masculino de 56 años, tabaquista, obeso, con hipertensión arterial (HTA) y diabético (DBT), anticoagulado, consulta por dolor en fosa ilíaca derecha, posterior a esfuerzo físico. Se realiza tomografía computarizada (TC) donde se visualiza lesión de aspecto expansivo intraperitoneal que muestra realce periférico. Se decide conducta quirúrgica. Se halla un tumor mesentérico. En su presentación, estos tumores hasta en un 60% suelen ser asintomáticos por lo que resultan solo un hallazgo imagenológico; es indispensable, pues, su sospecha clínica y fundamentalmente el aporte de la inmunohistoquímica para la definición de la patología. El CD 117 es el principal marcador. Su tratamiento de preferencia es siempre quirúrgico, acompañado de tratamientos quimioterápicos.

ABSTRACT Gastrointestinal stromal tumors (GISTs) account for < 3% of gastrointestinal neoplasms and are the most common mesenchymal tumors. They are more common in men > 50 years. They are benign in 80% of the cases and usually occur in the stomach and small intestine. The incidence of extragastrointestinal GISTs is unknown. A 56-year-old male patient sought medical care for abdominal pain in the right iliac fossa that appeared after exercising. The patient was a current smoker, obese, had a history of hypertension (HTN) and diabetes (DBT) and was receiving anticoagulants. A computed tomography (CT) scan showed an expansive mass within the peritoneum with peripheral enhancement. Surgical management was decided. During the procedure, a tumor was found in the mesentery. Up to 60% of these tumors are usually asymptomatic and are incidentally found in imaging tests; therefore, clinical suspicion and, most importantly immunohistochemistry, are essential for the diagnosis. CD117 is the main marker. Surgery is the treatment of choice for GISTs and chemotherapy is also indicated.

El paraganglioma como tumor mesentérico infrecuente / Mesenteric paraganglioma: a rare tumor

RESUMEN Los paragangliomas son tumores originados en las células neuroendocrinas que forman el sistema nervioso autónomo. Se consideran benignos aunque pueden desarrollar malignidad, por lo que su tra tamiento es quirúrgico. La presentación de paraganglioma de ubicación mesentérica es muy inusual.

ABSTRACT Paragangliomas are rare neuroendocrine tumors that arise in the autonomic nervous system. Although these tumors are considered benign, they must be removed by surgery due to their potential malig nant transformation. Mesenteric paragangliomas are extremely rare.

Mesenteric desmoid tumor after Roux-en-Y gastric bypass: a case report

We report the case of a 37-year-old woman investigated for left flank pain 1 year after bariatric surgery (Roux-en-Y gastric bypass). Abdominal computed tomography (CT) revealed a solid intra-abdominal lesion measuring 9.3 × 9.4 × 10.4 cm, compressing adjacent structures with no signs of invasion. Ileocolectomy with partial mesenteric resection was performed. A histopathological and immunohistochemical analysis confirmed the diagnosis of mesenteric desmoid tumor.(AU)

Mesenteric Leiomyosarcoma Mistaken as Subserosal Fibroid: A Rare Case Report.

Mesenteric leiomyosarcoma is a rare entity. It is usually seen in middle-aged individuals. The tumor usually remains asymptomatic for longer duration until it acquires a big size. Surgical removal is the main modality of treatment. Common symptoms of the patients are usually pain or distension abdomen. Pre-operative diagnosis is usually difficult. Ultrasonography and computed tomography scan can help in the diagnosis. In this case, the tumor was mistaken for subserosal fibroid but intraoperatively turned out a mesenteric mass with retroperitoneal extension. On histopathological examination, it was a leiomyosarcoma. Reoccurrence can occur. Early diagnosis and wide surgical resection can improve the prognosis of the patient.

Primary peritoneal serous papillary carcinoma presenting as a large mesenteric mass mistaken for ovarian cancer: a case of primary peritoneal carcinoma

Peritoneal origin serous papillary carcinoma is an uncommon primary malignancy occurring in the abdominal or pelvic peritoneum lining. It is characterized by peritoneal carcinomatosis with massive ascites, uninvolved or minimally involved ovary, and is histologically indistinguishable from ovarian serous tumors. Better recognition of this phenomenon in recent years has contributed to an increasing diagnostic frequency. We describe a rare case of peritoneal origin serous papillary carcinoma with unusual clinical presentations involving a solitary primary tumor originating from the peritoneal lining of the sigmoid colonal mesentery, without pelvic lymph node involvement or distant metastasis. Because of the location and morphological similarity, it was misdiagnosed as an ovarian malignancy. We aim to assist in the diagnosis of this disease with the following case report, thereby improving the management of patients with this condition.

Linfangioma mesentérico / Mesentery lymphangioma

El linfangioma representa el 6 por ciento de los tumores benignos, y su localización más frecuente es la región cervical, seguida de la axila en el 95 por ciento de los casos. Solo un 5 por ciento tiene localización en otro sitio. Dentro de estos, los abdominales representan entre el 2 y el 5 por ciento , y los más frecuentes son los del mesenterio. Se presenta el caso de una paciente de 45 años con el diagnóstico de metrorragia disfuncional, que a pesar del tratamiento hormonal, aumentó en intensidad. Se le practicó un legrado diagnóstico, cuyo resultado fue hiperplasia adenomatosa con ligera atipia, y se le indicó una histerectomía abdominal, que se realizó sin dificultad. En el transcurso de esta intervención se llevó a cabo la extirpación de un tumor del mesenterio del yeyuno, cuyo diagnóstico histológico definitivo fue linfangioma mesentérico(AU)

The lymphangioma accounts for the 6 percent of the benign tumors and its more frequent location is the cervical region, followed by the axilla in the 95 percent of cases. Only the 5 percent is located in other site including the abdominal ones accounting for the 2 and the 5 percent and the more frequent are those of mesentery. This is the case of a patient aged 45 diagnosed with dysfunctional metrorrhagia that despite the hormonal treatment increased its intensity. A diagnostic curettage was made whose result was an adenomatous hyperplasia with a slight atypia prescribing an abdominal hysterectomy carried out without problem. During this intervention a yeyunal mesenteric tumor was removed with a definitive histological diagnosis of mesenteric lymphangioma(AU)

Mesenteric Castleman's Disease

We report here a rare case of mesenteric Castleman's disease presenting as a mesenteric mass. A 13-year-old female child was admitted to our hospital complaining of intermittent vague abdominal pain. She had hypochromic anemia, thrombocytosis and an elevated erythrocyte sedimentation rate (ESR). Ultrasonography and computed tomography indicated an intra- abdominal mass might represent a lymphoma or gastrointestinal stromal tumor or leiomyoma, but the definitive preoperative diagnosis couldn't be confirmed. The surgical resection of the mass revealed the mesenteric hyaline vascular- type Castleman's disease.