Sponsors   Medical Terminology Daily (MTD) is a blog prepared by Clinical Anatomy Associates, Inc. as a service to the medical community, medical students, and the medical industry. We will post a workweek daily medical or surgical term, its meaning and usage, as well as biographical notes on anatomists, surgeons, and researchers through the ages. Be warned that some of the images used depict human anatomical specimens.

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A Moment in History 
Hippocrates of Cos
Hippocrates of Cos
(460 BC - 370 BC) 

A Greek physician, Hippocrates was born on the Greek island of Cos (Kos) c. 460BC. Considered the "Father of Medicine" he removed Medicine from the realms of superstition and magic. He was the first to record medical writings and is considered the first one to use and maintain proper medical terminology. There are many writing attributed to Hipocrates, but there is no assurance that these were actually written by Hippocrates himself. Hippocrates changed the art of medical diagnosis by replacing supernatural precepts with observation-based methodology. Natural, rather than supernatural causes, would from here on explain all disease processes, what was known as Rational Medicine.

He is known for having set the oath that governs medical principles, the Hippocratic Oath, although there are many authors that contend that this oath was written long time after he died.

Sources: 1. "Hippocrates himself" JAMA. 1968;204(12):1138-1139 2. "Hippocrates: father of medicine" Tan, S Y (01/01/2002). Singapore medical journal(0037-5675), 43(1), p.5.
Original image courtesy of  www.nih.gov


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Corona Mortis

Important for inguinal hernia anatomy and surgery, this term is Latin from [corona] meaning "crown' and [mortis] meaning "death'; the "crown or circle of death". The corona mortis (blue arrow) refers to an anatomical variation1, a vascular anastomosis between the obturator and the external iliac vascular systems that passes over Cooper's pectineal ligament and posterior to the lacunar (Gimbernat's) ligament. 

In some cases, the corona mortis is the actual obturator artery that arises from the inferior epigastric artery instead of the internal iliac artery. It can also arise from the external iliac artery. In both cases, it has been called an "aberrant obturator artery". This could be a misnomer, as this anatomical variation can be present in up to 25% of the cases. When present, the corona mortis  can be injured when a surgeon looks to enlarge the femoral ring by opening the lacunar ligament. This vascular structure could even be endangered in a laparoscopic procedure for inguinal of femoral hernia repair and a staple or tack is driven blindly into the pectineal (Cooper's) ligament.

Corona Mortis (A)Image property of: CAA.Inc.Artist: M. Zuptich

Berberoglu states that "although these tiny anastomoses... have been described in classical anatomy textbooks, these texts neglect to mention that theses anastomoses can be life-threatening".

In some rare cases, the corona mortis (aberrant obturator artery) coexists with the normal obturator artery.  Although called a [corona], this anatomical structure is an incomplete circle. In the image, the [corona mortis] is labeled "A".

Sources:
1. Rusu et al: "Anatomical considerations on the corona mortis" Surg Radiol Anat (2010) 32:17–24
2. Berberoglu et al: "An anatomic study in seven cadavers and an endoscopic study in 28 patients" Surg Endosc (2001) 15:72-75