Trichorrhexis nodosa: Difference between revisions

Revision as of 16:13, 9 February 2025

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

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

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

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

Related pages

References

External links

DermNet NZ: Trichorrhexis Nodosa

@@ Line 1: / Line 1: @@
-'''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).
+{{Short description|A hair shaft disorder}}
+{{Use dmy dates|date=October 2023}}
-== Overview ==
+'''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.
-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]].
+==Presentation==
+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.
-== Process ==
+===Symptoms===
+Individuals with trichorrhexis nodosa may notice:
+* Brittle hair that breaks easily
+* White nodules along the hair shaft
+* Hair that appears frizzy or lacks shine
-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.
+===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
-== Applications ==
+==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.
-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]].
+==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
-== Challenges ==
+==Related conditions==
+Trichorrhexis nodosa can be associated with other conditions, such as:
+* [[Tricho-hepato-enteric syndrome]]
-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.
+==Related pages==
+* [[Hair shaft disorders]]
+* [[Hair care]]
-== See also ==
+==References==
+{{Reflist}}
-* [[Computed tomography]]
+==External links==
-* [[Magnetic resonance imaging]]
+* [https://www.dermnetnz.org/topics/trichorrhexis-nodosa DermNet NZ: Trichorrhexis Nodosa]
-* [[Radon transform]]
-* [[Image processing]]
-== References ==
+[[Category:Hair diseases]]
-<references />
+[[File:Tricho-hepato-enteric_syndrome_(1).jpg|thumb|right|Hair shaft abnormalities in tricho-hepato-enteric syndrome, which can include trichorrhexis nodosa.]]
-{{stub}}
-[[Category:Medical imaging]]
-[[Category:Image processing]]
-[[Category:Radiology]]
-[[Category:Tomography]]