Cutaneous Drug Reactions are an adverse cutaneous reaction in response to administration of a drug, cutaneous eruptions are the most common negative reactions to medications.
Cushing Disease and Cushing Syndrome are clinical abnormalities associated with chronic exposure to excessive amounts of cortisol (the major adrenocorticoid)
Cushing disease is defined as glucocorticoid excess due to excessive adrenocorticotropic hormone (ACTH) secretion from a pituitary tumor. This is the most common cause of primary Cushing syndrome.
Cubital Tunnel Syndrome is a compression of the ulnar nerve on the medial aspect of the elbow where it enters the cubital tunnel. Often resulting in elbow pain and paresthesias of the forearm, wrist, 4th and 5th fingers.
Cryptorchidism is an incomplete or improper descent of 1 or both testicles; normally, descent is in the 7th–8th month of gestation. The cryptorchid testis may be palpable or nonpalpable.
Cryptococcosis is an infection caused by Cryptococcus neoformans or Cryptococcus gattii, with neoformans being the principal pathogen.
Cryptococcus neoformans is more common in immunocompromised persons, while Cryptococcus gatti causes disease in otherwise healthy persons
Cryoglobulinemia is a state characterized by the presence of cryoglobulins in a patient’s serum.
Cryoglobulins are circulating immunoglobulins that precipitate at cold temperatures (below 37°C) and dissolve on rewarming.
Croup is a subacute viral illness characterized by upper-airway symptoms such as barking cough, stridor, and fever. “Croup” is used to refer to viral laryngotracheitis or laryngotracheobronchitis (LTB), though it is sometimes used for LTB with pneumonitis, bacterial tracheitis, or spasmodic croup.
Crohn Disease is an idiopathic inflammatory disease of the alimentary tract that may present anywhere in the GI tract; most commonly found in the terminal ileum (60%), but may be limited to the colon in 15–20%, proximal small bowel 10%
Costochondritis is an anterior chest wall pain associated with pain and tenderness of the costochondral and costosternal regions
A callus (tyloma) is a diffuse area of hyperkeratosis, usually without a distinct border.
Typically the result of exposure to repetitive forces, including friction and mechanical pressure. Tend to occur on the palms of hands and soles of feet.