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The International Classification of Headache Disorders ( ICHD) is a detailed hierarchical classification of all headache -related disorders published by the International Headache Society. [ 1] It is considered the official classification of headaches by the World Health Organization, and, in 1992, was incorporated into the 10th edition of ...
Occipital neuralgia. Occipital neuralgia (ON) is a painful condition affecting the posterior head in the distributions of the greater occipital nerve (GON), lesser occipital nerve (LON), third occipital nerve (TON), or a combination of the three. It is paroxysmal, lasting from seconds to minutes, and often consists of lancinating pain that ...
A cerebrospinal fluid leak ( CSF leak or CSFL) is a medical condition where the cerebrospinal fluid (CSF) that surrounds the brain and spinal cord leaks out of one or more holes or tears in the dura mater. [ 1] A CSF leak is classed as either spontaneous (primary), having no known cause ( sCSF leak ), or nonspontaneous (secondary) where it is ...
This is a shortened version of the twelfth chapter of the ICD-9: Diseases of the Skin and Subcutaneous Tissue. It covers ICD codes 680 to 709. The full chapter can be found on pages 379 to 393 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1.
An upper respiratory tract infection ( URTI) is an illness caused by an acute infection, which involves the upper respiratory tract, including the nose, sinuses, pharynx, larynx or trachea. [ 3][ 4] This commonly includes nasal obstruction, sore throat, tonsillitis, pharyngitis, laryngitis, sinusitis, otitis media, and the common cold. [ 5]: 28 ...
320.4 * Tuberculous meningitis ( 013.0 †) 320.5 * Meningococcal meningitis ( 036.0 †) 320.7 * Meningitis in other bacterial diseases classified elsewhere. 320.8 Meningitis due to other specified bacteria. 320.9 Meningitis due to unspecified bacterium. 321 * Meningitis due to other organisms.
Chronic paroxysmal hemicrania. Chronic paroxysmal hemicrania ( CPH) is a severe debilitating unilateral headache usually affecting the area around the eye. It normally consists of multiple severe, yet short, headache attacks affecting only one side of the cranium. Retrospective surveys indicated that paroxysmal hemicrania was more common in ...
A thunderclap headache is a headache that is severe and has a sudden onset. It is defined as a severe headache that takes seconds to minutes to reach maximum intensity. [1] [2] Although approximately 75% are attributed to "primary" headaches—headache disorder, non-specific headache, idiopathic thunderclap headache, or uncertain headache disorder—the remainder are secondary to other causes ...