Age of occurrence in the patient, the location of the cyst, the edges of cystic contours, and the impact that the cyst has on adjacent structures must all be considered for proper diagnosis. Radiology
Several lesions can appear similarly in radiographic appearance. Intraoral X-rays or a 3-D cone beam scan of the affected area can be used to obtain radiological images and confirm diagnosis of cysts in the periapical area. Circular or ovoid radiolucency surrounding the root tip of approximately 1-1.5 cm in diameter is indicative of the presence of a periapical cyst. The border of the cyst is seen as a narrow opaque margin contiguous with the lamina dura. In cysts that are actively enlarging, peripheral areas of the margin may not be present. Periapical cysts have a characteristic  unilocular shape on radiographs. There is also a severe border of cortication between the cyst and surrounding bone. Pseudocysts, on the other hand, have a fluid filled cavity but are not lined by epithelium, therefore they have a less severe and more blurred border between the fluid and bony surroundings. Histopathology
In light microscopy, periapical cysts show:
Stratified squamous epithelium of variable thickness, except when originating in a maxillary sinus where there is respiratory epithelium (pseudostratified ciliated columnar epithelium). A fibrous capsule of varying thickness, with chronic inflammatory cells, wherein a plasma cells may be abundantThey sometimes have the following features:
Rushton hyaline bodies, which are amorphic, eosinophilic, linear to crescent-shaped bodies in the cyst epithelium, present in 10% of periapical cysts.
Macronychia is a genus of satellite flies in the family Sarcophagidae. There are at least 20 described species in Macronychia. Species
These 21 species belong to the genus Macronychia:

Data sources: i = ITIS, c = Catalogue of Life, g = GBIF, b = Bugguide.net

References


== Further reading ==