C1

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C1

Anatomy
A unique ring-shaped vertebra without a vertebral body and no adjacent disc, which has narrow anterior and posterior arches connected to stout wedge-shaped lateral masses; C1 transitions a rigid skull and a mobile cervical spine, acting like a “washer”, buffering various forces. Transverse atlantal ligament and alar ligaments stabilise C1 on C2; atlantoaxial joint ROM is 40º rotation, 10º flexion and 10º lateral bending.

Breast
A designation used in the UK for FNAC (fine needle aspiration cytology) specimens which cannot be interpreted due to:
(1) Hypocellularity—As a general rule, 6 to 10 epithelial clusters should be present, unless cells are not expected (e.g., fatty fragments) in a lesion that is clinically or radiologically a lipoma. Other situations in which hypocellular lesions should not be labelled C1 include fat necrosis and breast abscesses.
(2) Technical errors in aspiration, spreading or staining the specimen—Examples include blood staining, which makes it difficult to visualise epithelial clusters, crush artefact due to poor spreading of friable cells, over-/understaining, inadequate air drying and poor fixation.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

C1

Atlas Anatomy A unique ring-shaped vertebrae without a vertebral body and no adjacent disc, which has narrow anterior and posterior arches connected to stout wedge-shaped lateral masses; C1 transitions a rigid skull and a mobile cervical spine, acting like a 'washer', buffering various forces; transverse atlantal ligament and alar ligaments stabilize C1 on C2; atlantoaxial joint ROM is 40º rotation, 10º flexion and 10º lateral bending. See C1 fracture.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
squadrons are now outfitted with JSOW C-1, the Navy's first air-to-ground network-enabled weapon capable of attacking stationary-land and moving-maritime targets.
Royal Bank of Canada (TSX:RY) (NYSE:RY) proposed a cash redemption, subject to the approval of the Office of the Superintendent of Financial Institutions (OSFI), of all of the company's issued and outstanding non-cumulative first preferred shares series AB (the series AB shares) on 27 September 2017 and all of its issued and outstanding non-cumulative perpetual first preferred shares series C-1 (the series C-1 shares), on 13 November 2017, the company disclosed on Wednesday.
RBC has accepted 3,717,969 properly tendered Series C-1 Depositary Shares and 3,184,562 properly tendered Series C-2 Depositary Shares.
The company received the funds through the sale of series C-1 preferred stock, together with warrants to purchase common stock, bringing the total amount in the series C-1 financing to USD16.5m.
The C-1 and C-2 located at Chashma are performing very well.
The C-1 utilizes a drive-by-wire steering system, so though it sits like a motorcycle, the driver uses a steering wheel for navigation.
When only quinonic intermediates were present, and when polymerization was inhibited, the C-1 to C-6 aldehydes and carboxylic acids and the C-3 to C-6 ketones increased in concentration, and the C-1 to C-6 alcohols decreased in concentration when compared to the control sample.
"JSOW C-1 is the world's first net-enabled standoff weapon that can engage a moving maritime target," said Phyllis McEnroe, JSOW program director for Raytheon Missile Systems.
JSOW C-1 adds a moving maritime target capability and a two-way strike common weapon datalink to the combat-proven weapon.
Schedule C-1, Section 987 Gain or Loss Information.
The C-1 Division had 187 volunteered papers of which 134 (72%) were posters presented at the 2001 meeting at Charlotte, NC.