One hundred and thirty nine canine perineal tumours were histologically evaluated. The vast majority (134 tumours = 96.4%) appeared to originate from the characteristic glandular structures of this region. They were classified as well differentiated perianal gland tumours (58.3%), as moderately or poorly differentiated perianal gland tumours (21.6%) and as carcinomas without perianal gland diff...

GLANDS of the skin or integument of birds are frequently assumed to be limited to the uropygeal glands (Pycraft, 1910; GrassY, 1950; and others). Nevertheless, if one includes with integument those areas that are histologically skin-like but form unions with mucous membranes or deeper structures, additional glands must be considered. One set of these little-known glands is that found in the int...

Several species of terrestrial carnivores (Mammalia: Carnivora) have bold contrasting color patterns that, in some species, apparently signal possession of noxious anal gland secretions, or even physical strength and great ferocity; yet the evolutionary drivers of both placement and patterning of these contrasting pelage colors on the body, and the ecological selection pressures underlying them...

Tumours of the perianal region occur frequently in dogs (Bennett et al. 2002), with benign adenomas comprising 5896% of tumours at this site (Turek & Withrow 2013). In some cases these may transform to become malignant perianal adenocarcinomas, and these need to be distinguished from adenocarcinomas which derive from the apocrine secretory epithelium within the wall of the anal sacs (Polton & B...

Fistula in ano commonly develops as a chronic sequela to an asymptomatic or symptomatic abscess in an anal canal gland, i.e. cryptoglandular in origin [1]. It occurs in upto one third of patients who undergo drainage of an anorectal abscess [2]. Complex, recurring fistulas could develop secondary to trauma, infection, radiation or chronic granulomatous infections (tuberculosis, actinomycosis) [3].

We describe the immature stages and shelter building behavior of Falga jeconia ombra Evans, 1955 from eastern Ecuador. Chusquea scandens (Poaceae, Bambusoidea) is the larval food plant. Larvae in all stadia build shelters and forcibly eject frass with the aid of an anal comb. Later instars possess an eversible prothoracic "neck" gland. Larvae are associated with moving water.

The occurrence of heterotopic tissue in the large bowel is relatively rare. The most common type of tissue in such heterotopia is gastric mucosa, but rare cases of pancreatic and salivary tissue are also reported in literature. All cases of salivary choristomas reported in literature arose in the rectum–anal canal region [1–5]. Here we report a submucosal salivary gland choristoma in the sigma ...

Progress that has been made in research on the chemical aspects of mammalian semiochemistry over the past decade is discussed on the basis of examples from the most topical problem areas. The chemical characterization of the volatile organic constituents of the urine, anal gland secretions and exocrine gland secretions of rodents, carnivores, proboscids, artiodactyls and primates, and their pos...