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Corkscrew and cigarette-ash-shaped hairs in tinea capitis are caused by internal hair degradation and external resistance.

Two genes, Tabby and Ticked, determine cat coat patterns.

The document concludes that compulsive hair disorders, like trichotillomania, are complex and require careful diagnosis and treatment from both psychiatric and dermatological perspectives.

A girl's severely tangled hair couldn't be fixed and had to be cut due to a rare condition called plica neuropathica.

Gap junctions help control feather pattern formation by enabling cell communication.

Hair's strength and flexibility come from its protein structure and molecular interactions.

Trichoscopy is a useful tool for diagnosing different hair and scalp diseases by their unique visual features.

Two mouse mutants have defective hair cuticle cross-linking.

Human hair has different protein structures in its cuticle and cortex.

The study found specific hair and scalp patterns for different types of hair loss in Koreans, noting racial differences affect diagnosis.

Sheep have 17 keratin genes, similar to humans, but with different expression patterns affecting wool and hair.

Hair casts may be caused by repetitive hair pulling or styling and are often misdiagnosed.

Understanding how keratin structures in hair are arranged and interact is key for creating methods to extract and purify them.

A new method using visual aids to diagnose hair diseases was effective after brief training.

Trichoscopy is useful for diagnosing and monitoring hair and scalp conditions over time.

Gene expression, especially Dkk4, is key to cat color patterns.

Lizard claws have hair-like keratins similar to those in mammals.

Early shedding of the inner root sheath in noninflamed hair follicles is a relatively specific sign of Central Centrifugal Cicatricial Alopecia.

The report found a new type of hair loss in African-American women that affects more areas of the scalp than previously thought.

Trichoscopy is a useful tool for examining and monitoring hair and scalp conditions.

The malignant pilomatricoma showed strong epithelial keratin expression, suggesting it may not calcify.

Some mutant mice have hair with abnormal cross-linking, mainly in the cuticle, not affecting other hair parts.

A 4-year-old boy has a rare type of hair loss in a line pattern on his scalp.

Two cases of hairy elbows syndrome were described, with normal skin texture and symmetrical hair growth.

Pattern hair loss is the most common type of alopecia.

Hair matrix cysts are rare skin nodules with unique features, often needing surgical removal.

A specific hair diffraction pattern may indicate breast cancer if tested with the correct method.

The book helps doctors better understand and treat hair disorders due to gaps in their training.