Fat cysts

Compared to its use in product manufacturing, the use of formaldehyde in the medical fields is relatively small. Consumption in this area averages approximately 1.5% of the total production volume (WHO 1989). Some of the earlier, minor, medicinal applications for formaldehyde included its use during vasectomies, as a foot antiperspirant or as a preservative in such products, as a treatment for athlete s foot, and as a sterilant for echinococcus cysts prior to their surgical removal (lARC 1982). In veterinary medicine, formaldehyde has been used therapeutically as an antiseptic and as a fumigant. It has also been used to treat tympany, diarrhea, mastitis, pneumonia, and internal bleeding in animals (Windholz et al. 1983). In animal nutrition, formaldehyde is used to protect dietary protein in ruminants. It is used as a food additive to improve the handling characteristics of animal fat and oilseed cattle food mixtures (WHO 1989). 

Cyst formation was observed at the site of injection in mice subcutaneously administered 0.1 ml of fat-soluble extract of annatto three times a week for 17 months (van Esch et al. 1959). 

Besides utilization for food and feed, fats and oils are one backbone for green industrial chemistry and key components of bio-refinery concepts. Vegetable oils and their by-products, cysts, shells, hulls and parings as well as waste and... 

In the vast majority (88%), dermoid cysts are uni-lociflar cystic lesions filled with sebaceous material. A protuberance, the Rokitansky nodule, or dermoid plug, projects into the cavity and is the hallmark of dermoids (Fig. 9.17). It contains a variety of tissues, often including fat and calcifications, which represent teeth or abortive bone. Fat is detected in over 90%,... 

A minority of dermoid cysts will demonstrate no fat or only small foci of fat within the wall or the Rokitansky nodule (Fig. 9.28) [73]. Yamashita et al. reported that 15% of mature teratomas did not show fat within the cystic cavity. Approximately half of these cases displayed small amounts of fat within the wall of the dermoid or the dermoid plug. In 8% of henign teratomas, no fat could be detected [73]. 

Proteinaceous tissue (abscess, complex cyst, synovial fluid) Intermediate Fat, fatty marrow... 

Findings of low importance are considered benign and unlikely to require further medical treatment or additional work-up. Examples include vascular calcifications, granulomas, diverticu-losis, simple solid organ cysts, small to mediumsized hiatal hernias, and abdominal wall hernias containing fat. 

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