mucinous cystadenocarcinoma

mucinous cystadenocarcinoma

Appendix
A malignant mucinous (epithelial) tumour that is usually well-differentiated (so much so that it may be difficult to differentiate from appendicial adenoma with dilation, wall-thinning and rupture) and characterised by evidence of wall invasion, peritoneal extension (often initially presenting with pseudomyxoma peritonei) and late nodal metastases; it is staged using the TNM system. 10% of appendiceal adenocarcinomas present with a simultaneous colorectal carcinoma, and some are signet ring cell carcinomas.

Ovary
A malignancy thought to arise from ovarian epithelium, which comprises 5% of ovarian cancers.
 
Clinical findings
Symptoms may be nonspecific (e.g., abdominal pain, abdominal mass, bloating, back pain, urinary urgency, constipation, exhaustion) or specific (e.g., pelvic pain, abnormal vaginal bleeding, involuntary weight loss and ascites, a sign of advanced disease).
References in periodicals archive ?
It is hypothesized that mucinous cystadenomas and MCTLMPs represent a continuum of lesion which may eventually degenerate into mucinous cystadenocarcinoma.
Imaging findings of urachal mucinous cystadenocarcinoma associated with pseudomyxoma peritonei.
Mucoceles can be divided into 3 categories: (1) retention mucocele with normal/hyperplastic appendiceal mucosa; (2) mucinous cystadenoma with neoplastic epithelium similar to that seen in villous adenomas and adenomatous polyps; and (3) mucinous cystadenocarcinoma with neoplastic epithelium similar to that seen in adenocarcinoma of the colon.
All 9 pancreatic adenocarcinoma specimens were positive, 1 mucinous cystadenocarcinoma specimen was negative, and the adjacent normal specimen was negative as were the two chronic pancreatitis specimens.
Primary retroperitoneal mucinous cystadenocarcinoma associated with pregnancy.
The most common tumors in this category are serous and mucinous cystadenocarcinoma.
Histology showed mucinous cystadenocarcinoma of the prostate with extracellular mucin involving more than 50% of the specimen which was also PSA positive.
General case of the day: Mucinous cystadenocarcinoma of the appendix.
Histology revealed a mucinous cystadenocarcinoma of non-prostatic origin (Fig 2).
In the most recent WHO classification published in 2004, (17) pulmonary adenocarcinomas were divided into acinar, papillary, bronchioloalveolar, solid adenocarcinoma with mucin production, and mixed subtypes, as well as several variants (fetal adenocarcinoma, mucinous or colloid carcinoma, mucinous cystadenocarcinoma, signet ring adenocarcinoma, and clear cell carcinoma).
This includes 13 cases of primary intratesticular mucinous, of which 6 were borderline tumours (including 1 termed an "ossified tumour of low malignant potential"), 4 were cystadenomas, and 3 were either mucinous cystadenocarcinoma or mucinous carcinoma.