Review and description of the anatomical varieties of presentation of the semilunar ganglion.

The classically decrypted form of the semilunar ganglion is not the anatomical presentation most frequently found. This happens because of the amount of ganglions merged as a conglomerate, separated ganglions united by nerve cords, or as a unique form of presentation, variation called “solar ganglion”. (Galli). They are found at the height of the first lumbar vertebra, exchanging conjugated branches at their superior medial ends. (Galli). According to Walther, de right ganglion is more voluminous than the left one, and even may came to supplant it, interconnected by nerve fibers of an inch thin. The same author describes it with a medial portion, called main adrenal ganglion, more voluminous, and a lateral portion, littler, called renosplanchnic ganglion. Bouchet-Couilleret, divide it into a medial part, close to the celiac trunk, which receives the right vagus nerve and forms the yuxtaceliac ganglion, and a lateral part, which receives the mayor splanchnic nerve and forms the adreno-splanchnic ganglion. According to the authors, they have an irregular form, are voluminous, of 20mm long and are oblique towards anterior and medial.The understanding o the variation of the semilunar ganglion results useful for understanding several clinical syndromes and is vital for a correct interpretation of images several diagnoses techniques can provide nowadays.To evaluate the form of the semilunar ganglion, and its anatomical variations, according to data found in cadaveric dissections, providing our series.The paperwork design is of descriptive type. 12 cadaveric pieces was used, 10 of them was fetus, 6 males, and 4 females, and 2 adults, both males. They were fixed with formaldehyde (10%), and intravascular injected with a colored Unispert latex refill. For dissection and microdissection, classical instrumental was used, using optical magnification elements (2x and 5x) for microdissection. The dissected material was photographically documented, panoramically and focalized. Data were recorded in tables.The classical semilunar form of the ganglion was found in 40% of the pieces. In 35% of the cases, the ganglion was found as an irregular conglomerate form. In 22% of the dissections, a multifilamentous pattern of the ganglion was found. In 3% of the cases a biganglionar form was seen. (Two bodies linked by nerve bundles) of Galli’s description. The symmetry of both semilunar ganglions was almost never seen (asymmetry).Even when a non classic morphology of the ganglion would not come associated with any functional pathology, the right identification of this ganglionar