Trichorrhexis nodosa: Difference between revisions

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'''Tomographic reconstruction''' is a type of multidimensional technique used in [[image processing]] to create a 3D model of an object from a series of 2D images. This technique is commonly used in [[medical imaging]] technologies such as [[computed tomography]] (CT) and [[magnetic resonance imaging]] (MRI).
{{SI}}
 
{{Infobox medical condition
== Overview ==
| name            = Trichorrhexis nodosa
 
| image          = [[File:Tricho-hepato-enteric_syndrome_(1).jpg]]
Tomographic reconstruction involves the process of obtaining a tomogram (a two-dimensional image of a slice through an object) via tomography. Tomography as a method is used in diverse fields such as [[radiology]], [[archaeology]], [[oceanography]], [[astrophysics]], [[quantum information]], and [[materials science]].
| caption        = Trichorrhexis nodosa in a patient with tricho-hepato-enteric syndrome
 
| synonyms        = [[Knotted hair]]
== Process ==
| field          = [[Dermatology]]
 
| symptoms        = [[Hair breakage]], [[hair fragility]]
The process of tomographic reconstruction involves several steps. First, a series of 2D images are taken around a single axis of rotation. These images are then used to reconstruct a 3D model of the object. This is achieved through a mathematical procedure known as the [[Radon transform]] and its inverse.
| complications  = [[Hair loss]]
 
| onset          = Childhood or adulthood
== Applications ==
| duration        = Chronic
 
| causes          = [[Genetic disorder]], [[physical trauma]], [[chemical exposure]]
Tomographic reconstruction is widely used in medical imaging. It is a fundamental part of CT scans, which use X-rays to create detailed images of the body. It is also used in MRI scans, which use magnetic fields and radio waves to create images of the body. Other applications include [[electron tomography]], [[seismic tomography]], and [[optical tomography]].
| risks          = [[Excessive hair styling]], [[chemical treatments]]
 
| diagnosis      = [[Clinical examination]], [[trichoscopy]]
== Challenges ==
| differential    = [[Monilethrix]], [[pili torti]], [[trichothiodystrophy]]
 
| treatment      = [[Avoidance of trauma]], [[gentle hair care]], [[moisturizing treatments]]
Despite its wide applications, tomographic reconstruction faces several challenges. These include the need for a large number of images, the requirement for precise alignment of the images, and the computational complexity of the reconstruction process.
| prognosis      = Good with proper care
 
| frequency      = Common
== See also ==
}}
 
{{Short description|A hair shaft disorder}}
* [[Computed tomography]]
'''Trichorrhexis nodosa''' is a condition that affects the hair shaft, leading to hair breakage and the appearance of white nodules along the hair strand. It is a common cause of hair fragility and can be either acquired or congenital.
* [[Magnetic resonance imaging]]
==Presentation==
* [[Radon transform]]
Trichorrhexis nodosa is characterized by the presence of nodes or swellings along the hair shaft. These nodes are weak points where the hair is prone to breakage. The condition can affect any hair-bearing area of the body, but it is most commonly observed on the scalp.
* [[Image processing]]
===Symptoms===
 
Individuals with trichorrhexis nodosa may notice:
== References ==
* Brittle hair that breaks easily
 
* White nodules along the hair shaft
<references />
* Hair that appears frizzy or lacks shine
 
===Causes===
Trichorrhexis nodosa can be caused by:
* [[Physical trauma]] to the hair, such as excessive brushing or styling
* Chemical damage from hair treatments like bleaching or perming
* Genetic factors, in the case of congenital trichorrhexis nodosa
==Diagnosis==
Diagnosis of trichorrhexis nodosa is typically made through clinical examination and microscopic analysis of the hair. Under a microscope, the hair shaft will show characteristic nodes and fractures.
==Management==
Management of trichorrhexis nodosa involves addressing the underlying cause and minimizing further damage to the hair. Recommendations may include:
* Reducing physical and chemical trauma to the hair
* Using gentle hair care products
* Ensuring adequate nutrition to support hair health
==Related conditions==
Trichorrhexis nodosa can be associated with other conditions, such as:
* [[Tricho-hepato-enteric syndrome]]
==See also==
* [[Hair shaft disorders]]
* [[Hair care]]
==References==
{{Reflist}}
==External links==
* [https://www.dermnetnz.org/topics/trichorrhexis-nodosa DermNet NZ: Trichorrhexis Nodosa]
[[Category:Hair diseases]]
{{stub}}
{{stub}}
[[Category:Medical imaging]]
[[Category:Image processing]]
[[Category:Radiology]]
[[Category:Tomography]]

Latest revision as of 23:20, 6 April 2025

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD medical weight loss NYC and sleep center NYC

Trichorrhexis nodosa
Synonyms Knotted hair
Pronounce N/A
Specialty N/A
Symptoms Hair breakage, hair fragility
Complications Hair loss
Onset Childhood or adulthood
Duration Chronic
Types N/A
Causes Genetic disorder, physical trauma, chemical exposure
Risks Excessive hair styling, chemical treatments
Diagnosis Clinical examination, trichoscopy
Differential diagnosis Monilethrix, pili torti, trichothiodystrophy
Prevention N/A
Treatment Avoidance of trauma, gentle hair care, moisturizing treatments
Medication N/A
Prognosis Good with proper care
Frequency Common
Deaths N/A


A hair shaft disorder


Trichorrhexis nodosa is a condition that affects the hair shaft, leading to hair breakage and the appearance of white nodules along the hair strand. It is a common cause of hair fragility and can be either acquired or congenital.

Presentation[edit]

Trichorrhexis nodosa is characterized by the presence of nodes or swellings along the hair shaft. These nodes are weak points where the hair is prone to breakage. The condition can affect any hair-bearing area of the body, but it is most commonly observed on the scalp.

Symptoms[edit]

Individuals with trichorrhexis nodosa may notice:

  • Brittle hair that breaks easily
  • White nodules along the hair shaft
  • Hair that appears frizzy or lacks shine

Causes[edit]

Trichorrhexis nodosa can be caused by:

  • Physical trauma to the hair, such as excessive brushing or styling
  • Chemical damage from hair treatments like bleaching or perming
  • Genetic factors, in the case of congenital trichorrhexis nodosa

Diagnosis[edit]

Diagnosis of trichorrhexis nodosa is typically made through clinical examination and microscopic analysis of the hair. Under a microscope, the hair shaft will show characteristic nodes and fractures.

Management[edit]

Management of trichorrhexis nodosa involves addressing the underlying cause and minimizing further damage to the hair. Recommendations may include:

  • Reducing physical and chemical trauma to the hair
  • Using gentle hair care products
  • Ensuring adequate nutrition to support hair health

Related conditions[edit]

Trichorrhexis nodosa can be associated with other conditions, such as:

See also[edit]

References[edit]

<references group="" responsive="1"></references>


External links[edit]

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