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Related Concept Videos

Accessory Structures of the Skin: Nails01:05

Accessory Structures of the Skin: Nails

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Nails are one of the important accessory structures of the skin. They are hard, protective structures that cover the dorsal surface of the distal phalanges of fingers and toes. Nails are composed of specialized keratinized cells and serve various functions, including protection, sensation, and manual dexterity.
The main components of a nail include the following.
Nail Plate: The nail plate is the visible portion of the nail that extends beyond the fingertips or toes. It is a hard, translucent...
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Skin Cancer01:30

Skin Cancer

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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...
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Skin Diseases and Disorders01:23

Skin Diseases and Disorders

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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
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Papillary Dermis01:11

Papillary Dermis

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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
The papillary layer is made of loose, areolar connective tissue, which means the collagen...
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Diabetic Foot Ulcer01:31

Diabetic Foot Ulcer

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Definition A diabetic foot ulcer (DFU) is a chronic, non-healing wound that develops in individuals with diabetes. It typically occurs on pressure-bearing areas such as the heel, metatarsal heads, or hallux, and carries a high risk of infection and amputation.Pathophysiology • The development of DFUs can be explained by four interconnected mechanisms: neuropathy, ischemia, infection, and impaired wound healing. • Neuropathy is the most common factor. Sensory...
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Reticular Dermis01:15

Reticular Dermis

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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
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Related Experiment Video

Updated: Apr 26, 2026

Non-Invasive Visualization of Nailbed Microvascular Morphology in Mice Using Capillaroscopy
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Non-Invasive Visualization of Nailbed Microvascular Morphology in Mice Using Capillaroscopy

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Nail bed onychomatricoma.

Lei Wang1, Tianwen Gao, Gang Wang

  • 1Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xian, China.

Journal of Cutaneous Pathology
|July 22, 2014
PubMed
Summary

Onychomatricoma, a rare nail tumor, can arise from the nail bed, not just the matrix. Fungal infection may occur secondarily in affected nail areas.

Area of Science:

  • Dermatopathology
  • Oncology

Background:

  • Onychomatricoma is an uncommon neoplasm originating from the nail matrix.
  • Rare cases have been documented to arise from the proximal nailfold.

Observation:

  • A 51-year-old male presented with melanonychia affecting the distal nail plate.
  • Histopathological analysis revealed onychomatricoma predominantly in the nail bed.
  • The nail matrix was largely uninvolved in the tumor's presentation.

Findings:

  • Onychomatricoma can develop in epithelial tissues surrounding the nail unit, such as the nail bed.
  • A concurrent fungal infection was identified in a localized region of the distal nail plate.

Implications:

  • This case expands the known origins of onychomatricoma to include the nail bed.
Keywords:
fungusnail bednail matrixonychomatricoma

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  • Fungal infection might be a secondary complication associated with onychomatricoma.