Ovarian cancers are classified according to the microscopic appearance of their structures (histology or histopathology). Basically, it covers the gross anatomy and the microscopic (histology and cytology) of living beings. HLA-DQ8 haplotypes, negative serology, and normal histology or duodenal lymphocytosis had celiac disease. The study of the human body involves anatomy, physiology, histology and embryology. IPASS studied 1,217 patients with confirmed adenocarcinoma histology who were former or never smokers. Under these two, Sherrington parted with a good foundation in physiology, morphology, histology, and pathology. Thioflavins are dyes used for histology staining and biophysical studies of protein aggregation. The microscopic examination of tissue (histology) gives the definitive diagnosis. Mixed tumors contain elements of more than one of the above classes of tumor histology. These antibody staining methods often require the use of frozen section histology. This can be largely attributed to the decreasing smoking rates, which favors the adenocarcinoma histology. Staff shortages at histology departments are delaying diagnosis and start of treatment for cancer patients. A tissue sample for histology and cultures can also be collected and tested. H&E staining is one of the most commonly used techniques in histology. Cystic hygroma is indistinguishable from cavernous lymphangiomas on histology.