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At least 361 records · Page 20Linked to original sources
PubMed1985

Primary malignant lymphoma of the appendix.

A 70-year-old Japanese woman with primary malignant lymphoma in the appendix was treated. The diagnosis was established after surgery. Histologically, the tumor was malignant lymphoma, lymphocytic, well differentiated, according to the Rappaport's classification which is a good prognostic type of extranodal malignant lymphoma. The patient was treated by ileocecal resection and without radiochemotherapy. The 36-month follow-up revealed neither evidence of recurrence nor metastases.

Aged↗
PubMed1984

Intussusception of the appendix.

Two cases of intussusception of the appendix are reported--one caused by adenocarcinoma and adenomatous polyp and the other by an endometrioma. Appendiceal intussusception and adenocarcinoma are both uncommon entities and this is the first report of the two occurring concomitantly. Due to variable symptoms, the correct diagnosis of appendiceal intussusception has rarely been made preoperatively. Classification, symptoms, radiographic appearance, and differential diagnosis are discussed, and the authors suggest a new classification for intussusception of the appendix.

Adenocarcinoma↗
PubMed1984

Metastatic carcinoid tumor of the appendix. Report of a case and review of the literature.

A case of regional metastatic carcinoid of the appendix is presented and the literature reviewed for indications for right colectomy. Five cases of lymph-node metastasis from primary appendiceal carcinoids less than 2 cm in diameter have been reported. There is no reported case of systemic metastasis occurring after appendectomy for a carcinoid with a diameter of less than 2 cm. Perineural involvement, lymphatic invasion, mesoappendiceal invasion, histologic appearance, and location of the tumor in the appendix seem to be unreliable predictors of clinically significant regional node involvement. It is concluded that a right colectomy is indicated only in patients with carcinoid tumors of the appendix 2 cm or more in diameter, or with residual tumor at the margin of resection.

Adult↗
PubMed1987

Adenocarcinoid of the appendix presenting with metastases to the liver.

A case of hepatomegalia due to multiple metastases of unknown origin to the liver is described. At autopsy the primary tumor, an adenocarcinoid tumor of the appendix, was identified along with multiple metastases to the lymph nodes and widespread peritoneal carcinoidosis. Hepatic metastases from an appendiceal adenocarcinoid tumor has not been described previously. In the liver and lymph nodes the tumor had an insular growth pattern and was composed predominantly of cells of carcinoid type, whereas the carcinoidosis was composed almost entirely of signet-ring cells. It is suggested that differentiation of the metastases of appendiceal adenocarcinoids is modulated by factors in the recipient organ.

Aged↗
PubMed1988

Adenocarcinoid of the vermiform appendix. A clinicopathologic study of 20 cases.

Adenocarcinoid of the appendix is a tumor that shares the histologic features of both carcinoids and adenocarcinomas. The metastatic ability of the tumor is uncertain. Twenty consecutive cases of adenocarcinoids were compared with 88 cases of conventional appendiceal carcinoids. Metastatic tumor spread was found in six of 20 cases of adenocarcinoids, but in none of the conventional carcinoids. Metastasizing tumors were characterized by a moderate to severe nuclear atypia and a high mitotic count. These features were present in only two of the nonmetastasizing tumors, one of which was treated by hemicolectomy. Adenocarcinoids showing moderate or severe nuclear atypia, a mitotic count of two or more mitoses/10 high power fields, or spread beyond the appendix should be treated by hemicolectomy. If these features are not present, simple appendectomy is adequate.

Adenocarcinoma↗
PubMed1985

Adenocarcinoma of the appendix.

Three cases of adenocarcinoma of the appendix are reported. All three patients presented with acute appendicitis and the tumors were diagnosed only on histologic examination of the excised appendix. The first patient subsequently had a right hemicolectomy and was proven to have a Dukes' B tumor. The second patient probably had a Dukes' B also, but no further surgery was performed because of advanced presenile dementia. Advanced disease was found in the third patient. Analysis of 145 cases reported over the last ten years suggests that, unless the tumor is in Dukes' A stage, right hemicolectomy should be carried out if the patient is fit for radical surgery. The overall prognosis appears to be the same as that for carcinoma of the colon.

Adenocarcinoma↗
PubMed1986

Pseudomyxoma peritonei. A localized, benign variant of appendiceal origin.

A case of a huge, self-contained cyst of pseudomyxoma peritonei arising from the rupture of a benign cystadenoma of the appendix is reported. Curative surgical removal involved both small bowel and right colon resection. The pathologic spectrum of the appendiceal mucoceles, from mucosal hyperplasia to benign cystadenoma and malignant cystadenocarcinoma, is presented. The variants of pseudomyxoma peritonei (benign-malignant, localized-diffuse) are discussed and correlated with the appendiceal lesions. Clinicopathologic relationships and treatment options also are covered.

Appendiceal Neoplasms↗
PubMed1977

Malignant appendiceal carcinoid with intussusception of the base manifesting as a cecal tumor: report of a case.

A case of an appendiceal carcinoid tumor with regional lymph-node metastases is presented. The size of the tumor was remarkable, as the appendix was infiltrated throughout its length. The proximal part of the appendix was intussuscepted into the cecum. Preoperatively, the lesion was diagnosed as a polypoid tumor of the cecum. A primary right hemicolectomy was carried out.

Adult↗
PubMed1980

Carcinoma of colon and appendix related to fecal stasis.

It is widely accepted that carcinoma of the large bowel is common in the Western world because we eat a low-residue diet which causes fecal stasis. The part of the large bowel with the most stasis is the appendix, which has similar mucosa; but the incidence of carcinoma per unit area of appendicular mucosa is four times less than carcinoma per unit area of large bowel. Therefore, fecal stasis is probably not important in the etiology of carcinoma of the appendix.

Appendiceal Neoplasms↗
PubMedDate not supplied

An unusual malformation of the vermiform appendix simulating endometriosis: a case report with discussion of differential diagnosis.

A 48-year-old nulliparous woman with a long history of pelvic endometriosis underwent a gynecologic operation, and a swollen and indurated appendix was removed because of suspected endometriosis. Pathologic examination revealed no endometriosis, but examination of the distal appendix showed structural disorganization of its entire wall, with lack of proper differentiation of its normal coats and irregular overgrowth of fibroadipose, fibromuscular, and neural elements. Differential diagnoses, including endometriosis, carcinoid tumor and neurofibromatosis, are discussed.

Appendiceal Neoplasms↗
PubMedDate not supplied

Mucocele of the appendix: diagnosis and surgical management.

Cystadenomas of the appendix are an unusual clinical entity. Despite a recognized constellation of findings, the diagnosis is not usually made prior to surgical exploration. A 65-year-old man is reported in whom preoperative evaluation, including sonography and angiography, resulted in the correct diagnosis confirmed at surgery. The appropriate use of newer diagnostic modalities will establish the preoperative diagnosis and facilitate surgical intervention. Appendectomy is curative for this condition, as neither regional nor distant lymph node metastases or hematogenous spread have been reported. When symptoms due to pseudomyxoma peritoneai occur, a continued aggressive surgical approach is justified.

Aged↗
PubMed1979

Primary epithelial tumors of the appendix and a reappraisal of the appendiceal "mucocele".

A 28-year review of the records at Hines V.A. Medical Center revealed 17 primary epithelial tumors of the appendix. Five of these tumors were benign and 12 malignant. It is suggested that the term mucocele be abandoned, because it represents the end result rather than a definite pathologic entity. The majority of benign tumors and carcinoid tumors of the appendix are discovered incidentally to other procedures. The majority of adenocarcinomas cause symptoms and signs of appendicitis. Simple appendectomy is sufficient treatment of all benign tumors of the appendix, and for all carcinoids that show no gross local metastases and are less than 2 cm in diameter. Simple appendectomy followed by right hemicolectomy or initial right hemicolectomy is the treatment of choice for all carcinoids of the appendix that show gross local metastases and are 2 cm or more in diameter and for all adenocarcinomas of the appendix, whether mucinous or colonic, in the absence of distant metastasis. A new classification for primary epithelial tumors of the appendix is suggested.

Adenocarcinoma↗