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A cystic nephroma, also known as multilocular cystic nephroma, mixed epithelial stromal tumour (MEST) and renal epithelial stromal tumour (REST), [1] is a type of rare benign kidney tumour. Symptoms [ edit ]
Papillae vs pseudopapillae: True papillae are outgrowths of epithelium, surrounding fibrovascular cores of stroma and at least one blood vessel. In contrast, pseudopapillae (such as in solid pseudopapillary tumours) are nests of proliferating cells that eventually grow to become almost back-to-back, with cells in the centers of nests disintegrating, leaving rims of cells lining the periphery ...
Call–Exner bodies marked with black circles in an intermediate-high magnification micrograph of a granulosa cell tumour, a type of sex cord stromal tumour. H&E stain. H&E stain. Call–Exner bodies , giving a follicle-like appearance, are small eosinophilic fluid-filled punched out spaces between granulosa cells . [ 1 ]
These ovarian tumors are usually multi-septated, cystic masses with thin walls. They also contain varying amounts of solid tissue which consists of proliferating stromal tissue, papillae, or malignant tumor cells. Benign mucinous cystadenomas compose 80% of mucinous ovarian tumors [2] and 20–25% of benign ovarian tumors overall. The peak ...
Serous cystadenoma of the pancreas, serous microcystic adenoma: Micrograph showing a pancreatic serous cystadenoma. H&E stain. Specialty: General surgery, gastroenterology: Symptoms: Usually asymptomatic: Usual onset: 50–60 years of age: Risk factors: Female gender: Treatment: Surgical resection (if symptomatic) Deaths: 0.1% [1]
The prognosis of phyllodes tumor is good with an overall 87% 10-year survival rate. [5] After wide-margin surgical excision, 98.7% of benign phyllodes tumors and 80% of borderline were cured. [25] In rare cases where the tumor has metastasized, the prognosis is poor. [5] This most commonly occurs in cases of malignant grade phyllodes tumor. [5]
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms of the gastrointestinal tract. GISTs arise in the smooth muscle pacemaker interstitial cell of Cajal, or similar cells. [2] They are defined as tumors whose behavior is driven by mutations in the KIT gene (85%), [2] PDGFRA gene (10%), [2] or BRAF kinase (rare).
Brenner tumours are an uncommon subtype of the surface epithelial-stromal tumour group of ovarian neoplasms. The majority are benign, but some can be malignant. [1] They are most frequently found incidentally on pelvic examination or at laparotomy. [2] Brenner tumours very rarely can occur in other locations, including the testes. [3]