..., including benign, borderline, and malignant varieties, tend to be unilateral ( 7 – 11 ). Microscopic Brenner tumorlets, however, may be bilateral. Brenner tumors and borderline Brenner tumors are clinically benign ( 12 – 15 ). Clinical information regarding malignant Brenner tumors is sparse, although...

.... Microtumors are not associated with a clinical syndrome due to hormone secretion. Synonyms include neuroendocrine microadenoma and islet cell tumorlet (archaic). General Features. Pancreatic neuroendocrine microtumors are defined based on their size but otherwise resemble PanNETs...

... of the cervix and tumorlets of sex-cord stromal tumor with annular tubules of the ovary in Peutz-Jeghers syndrome . J Gynecol Oncol   2013 ; 24 : 92 - 5 . 144. Kondo   T , Hashi   A , Murata   SI , et al   Gastric mucin is expressed in a subset of endocervical tunnel clusters: type A tunnel...

...), diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) is defined as a multifocal hyperplasia of pulmonary neuroendocrine cells associated with tumorlets. It is considered a preinvasive condition that may develop into carcinoid tumors. DIPNECH is often accompanied by mild chronic...

.... Hemangioblastomas are composed of capillary-sized vascular channels surrounding stromal cells ( fig. 9-32 , left). The stromal cells are vacuolated. A small cluster of angiomesenchymal cells, tumorlet cells ( fig. 9-32 , right), are present in both ocular and cerebellar hemangioblastomas. Definition...