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Related Concept Videos

Skin Cancer01:30

Skin Cancer

Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Acne Infection01:27

Acne Infection

Acne is a multifactorial skin condition primarily affecting adolescents and young adults, with a global prevalence estimated to exceed 75% in this demographic. The condition is characterized by the formation of comedones (blackheads and whiteheads), papules, pustules, nodules, and, in severe cases, cysts, particularly in areas rich in sebaceous glands such as the face, neck, chest, and back. The pathogenesis involves increased sebum production, follicular hyperkeratinization, colonization by...
Accessory Structures of the Skin: Sebaceous Glands01:21

Accessory Structures of the Skin: Sebaceous Glands

A sebaceous gland is a type of oil gland found almost all over the skin ( except palms and soles) and helps lubricate and waterproof the skin and hair. Most sebaceous glands are associated with hair follicles. They generate and excrete sebum, a mixture of lipids, onto the skin surface, thereby naturally lubricating the dry and dead layer of keratinized cells of the stratum corneum, keeping it pliable.
These glands that produce the oils on the skin and hair are holocrine glands. The mature...
Papillary Dermis01:11

Papillary Dermis

Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
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Pleiotropy01:33

Pleiotropy

Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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Cushing Syndrome II: Pathophysiology

Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features of the...

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Related Experiment Video

Updated: May 7, 2026

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
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Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia

Published on: August 9, 2024

Bilateral nevus comedonicus syndrome.

Takamichi Ito1, Yasutaka Mitamura, Yayoi Tsuji

  • 1Division of Dermatology, Department of Medicine of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8503, Japan ; †Department of Dermatology, National Hospital Organization Kyushu Medical Center, Fukuoka 810-0065, Japan.

Yonago Acta Medica
|September 14, 2013
PubMed
Summary

This case report details an unusual presentation of bilateral nevus comedonicus syndrome in a 62-year-old man, highlighting diverse systemic complications and treatment resistance.

Keywords:
nevus comedonicusnevus comedonicus syndromeschwannomathyroid tumor

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Combining Reflectance Confocal Microscopy with Optical Coherence Tomography for Noninvasive Diagnosis of Skin Cancers via Image Acquisition
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Last Updated: May 7, 2026

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
06:15

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Combining Reflectance Confocal Microscopy with Optical Coherence Tomography for Noninvasive Diagnosis of Skin Cancers via Image Acquisition
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Combining Reflectance Confocal Microscopy with Optical Coherence Tomography for Noninvasive Diagnosis of Skin Cancers via Image Acquisition

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Area of Science:

  • Dermatology
  • Medical Genetics

Background:

  • Nevus comedonicus is a rare follicular malformation.
  • It can present unilaterally or bilaterally, sometimes associated with systemic conditions (nevus comedonicus syndrome).

Purpose of the Study:

  • To report an unusual case of disseminated bilateral nevus comedonicus with systemic complications.
  • To discuss the diagnostic challenges and appropriate classification for such complex cases.

Main Methods:

  • Case presentation of a 62-year-old Japanese man with a 50-year history of lesions.
  • Clinical examination, histopathologic analysis, and review of patient's extensive medical history.
  • Assessment of treatment response to topical retinoic acid and activated vitamin D3.

Main Results:

  • The patient exhibited widespread, symmetric comedo-like papules following Blaschko's lines.
  • Significant systemic comorbidities included thyroid cancer, pneumothorax, spinal abnormalities, and atrial fibrillation.
  • Topical treatments showed no improvement in the skin lesions.

Conclusions:

  • The patient's condition was diagnosed as bilateral nevus comedonicus syndrome, representing a unique presentation.
  • This case underscores the variability of nevus comedonicus and its potential for extensive systemic involvement.
  • Further research is needed to understand the pathogenesis and optimal management of complex nevus comedonicus syndrome cases.