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The topology of the septa, especially around the rim, results in the various suture patterns found. [5] The septal curvature in nautiloids and ammonoids also differ in that the septa curves towards the opening in nautiloids, and away from the opening in ammоnoids. [6] Regions of the suture line and variants in suture patterns Ammonite clean cut
Adult Baculites ranged in size from about 7 centimetres (2.8 in) (Baculites larsoni) up to 2 metres (6.6 ft) in length. As with other ammonites , the shell consisted of a series of camerae, or chambers, that were connected to the animal by a narrow tube called a siphuncle by which gas content and thereby buoyancy could be regulated in the same ...
Suture granuloma, with multinucleated giant cells surrounding (grey) suture material. Foreign bodies indicate a foreign body granuloma. Specific forms of multinucleated giant cells include the Touton giant cell, which contains a ring of nuclei surrounding a central homogeneous cytoplasm, with foamy cytoplasm surrounding the nuclei.
Poison ivy. What it looks like: Poison ivy is a type of allergic contact dermatitis that is caused by the oil (urushiol oil) in the poison ivy plant, explains Karan Lal, D.O., M.S., F.A.A.D ...
Granuloma annulare (GA) is a rare, [1] sometimes chronic skin condition which presents as reddish bumps on the skin arranged in a circle or ring. [2] It can initially occur at any age, though two-thirds of patients are under 30 years old, and it is seen most often in children and young adults. Females are two times as likely to have it as males ...
In a study from Switzerland, Grover's disease was diagnosed in just 24 of more than 30,000 skin biopsies. [4] Grover's disease is mainly seen in males over the age of forty. [13] Grover's disease affects chiefly white adults in the fifth decade or later, and appears to be around 1.6 to 2.1 times more common in men than in women.
Livedo reticularis is a common skin finding consisting of a mottled reticulated vascular pattern that appears as a lace-like purplish discoloration of the skin. [1] The discoloration is caused by reduction in blood flow through the arterioles that supply the cutaneous capillaries, resulting in deoxygenated blood showing as blue discoloration ().
The Casoni test is a skin test used in the diagnosis of hydatid disease.The test involves the intradermal injection of 0.25 ml of sterilised fluid from hydatid cysts/human cyst and sterilised by Seitz filtration into one forearm, with an equal volume of saline injected into the other forearm.