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FingernailAka: Toenail, Onychogryposis, Onychomadesis, Onychoschizia, Onychotillomania, Nail Growth, Hyponychium, Eponychium, Cuticle, Anonychia, Onychodystrophy
- See Also
- Anatomy
- Images
- Germinal matrix
- Root of the nail
- Forms nail plate from base of nail bed
- Distal matrix produces deeper nail plate
- Proximal matrix produces superficial nail plate
- Eponychium
- Skin just proximal to cuticle
- Dorsal fold at proximal surface of nail
- Paronychial edge or Perionychium
- Lateral borders of nail
- Site of hangnails and Paronychia
- Hyponychium
- Area beneath free edge of nail
- Junction where nail bed meets tip of digit skin
- Nail Plate
- Hard and translucent
- Composed of dead keratin
- Surrounded by perionychium
- Nail Bed (Sterile Matrix)
- Adheres to underside nail with squamous epithelium
- Makes nail plate thicker and stronger
- Contains blood vessels and nerves
- Physiology: General
- Nail is keratinized squamous cells
- Forms protective plate
- Enhances fingertip sensation
- Nail acts as counterforce to fingertip
- Two Point Discrimination decreased when nail absent
- Physiology: Nail Growth
- Normal Nail Growth
- Fingernails
- Grow 3 mm per month
- Require 6 months for complete re-growth
- Toenails
- Require 2-3 times as long to re-grow as fingernails
- Fingernails
- Arrested Nail Growth
- Caused by any systemic illness
- Results in deep transverse grooves (Beau's Lines)
- Normal Nail Growth
- Definitions
- Anonychia
- Absent nails
- Chromonychia (see Nail Discoloration)
- Color changes of nails
- Koilonychia
- Spoon-shaped nails
- Onychodystrophy
- Degenerative changes of nail
- Onychogryposis
- Hypertrophic shape changes of nail
- Onycholysis
- Loosening or detachment of nail from nail bed
- Onychomadesis
- Spontaneous separation from nail matrix
- Onychomycosis
- Fungal infections of the nail
- Onychophagia
- Nail biting
- Onychoschizia
- Splitting, horizontal layering of distal nail edge
- Onychotillomania
- Compulsive pulling or picking of nails
- Paronychia
- Inflammation of skin around nails
- Anonychia
Dystrophia unguium (C0221260) | |
|---|---|
| Concepts | Disease or Syndrome (T047) |
| ICD9 | 703.8 |
| English | Dystrophia unguium, Dystrophic nail, Dystrophic nails, Nail dystrophy, Onychodystrophy |
| Spanish | distrofia de unas, onicodistrofia |
| Parent Concepts | Nail Diseases (C0027339) |
| Sources | DXP, MTHICD9, OMIM, SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
Eponychium (C0221994) | |
|---|---|
| Concepts | Body Part, Organ, or Organ Component (T023) |
| English | Eponychium |
| Spanish | eponiquio, eponychium |
| Parent Concepts | Nail part (C1268194), Organ component of skin (C0925982) |
| Sources | SCTSPA, SNOMEDCT, UWDA Derived from the NIH UMLS (Unified Medical Language System) |
Structure of hyponychium (C0221998) | |
|---|---|
| Concepts | Body Part, Organ, or Organ Component (T023) |
| English | Hyponychium, Structure of hyponychium |
| Spanish | estructura del hiponiquio, hiponiquio, hyponychium |
| Parent Concepts | Nail bed structure (C0221997), Organ component of skin (C0925982) |
| Sources | MTH, SCTSPA, SNOMEDCT, UWDA Derived from the NIH UMLS (Unified Medical Language System) |
Structure of nail of finger (C0222001) | |
|---|---|
| Concepts | Body Part, Organ, or Organ Component (T023) |
| MSH | D009262 |
| English | Finger Nail, Fingernail, Fingernails, Nail of finger, Nail plate of finger, Structure of nail of finger |
| Spanish | estructura de la una de un dedo de la mano, una de dedo de la mano |
| Parent Concepts | Body part (C0229962), Nail plate (C0027342), Fingers (C0016129), Structure of nail of digit of hand (C1275973), Skin of dorsal part of finger (C0829707) |
| Sources | HL7V2.5, MSH, MTH, NCI, SCTSPA, SNOMEDCT, UWDA Derived from the NIH UMLS (Unified Medical Language System) |
Structure of nail of toe (C0222007) | |
|---|---|
| Concepts | Body Part, Organ, or Organ Component (T023) |
| MSH | D009262 |
| English | Nail of toe, Nail plate of toe, Structure of nail of toe, Toe Nail, Toenail, Toenails |
| Spanish | estructura de la una del dedo del pie, una del dedo del pie, una del pie |
| Parent Concepts | Body part (C0229962), Nail plate (C0027342), Toes (C0040357), Skin of dorsal part of toe (C0829285) |
| Sources | HL7V2.5, LNC, MSH, MTH, NCI, SCTSPA, SNOMEDCT, UWDA Derived from the NIH UMLS (Unified Medical Language System) |
Onychotillomania (C0233623) | |
|---|---|
| Concepts | Mental or Behavioral Dysfunction (T048) |
| English | Neurotic picking at nails, Onychotillomania |
| Spanish | onicotilomania, tendencia neurotica a querer arrancarse las unas |
| Parent Concepts | Nail Biting (C0027338) |
| Sources | OMIM, SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
Lamellar nail splitting (C0263531) | |
|---|---|
| Concepts | Sign or Symptom (T184) |
| English | Flaking of nails, Horizontal splitting of nail plate, Lamellar nail dystrophy, Lamellar nail splitting, Onychoschizia, Peeling of nails |
| Spanish | desprendimiento horizontal de las capas de la una, onicosquicia, onicosquisis |
| Parent Concepts | Dystrophia unguium (C0221260) |
| Sources | SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
Onychogryposis (C0263537) | |
|---|---|
| Concepts | Disease or Syndrome (T047) |
| ICD9 | 703.8 |
| English | Hook nail, OG - Onychogryphosis, Onychogryphosis, Onychogryposis |
| Spanish | onicogrifosis, una en gancho |
| Parent Concepts | Dystrophia unguium (C0221260), Duplicate concept (C1274013) |
| Sources | COSTAR, MTHICD9, OMIM, SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
Onychomadesis (C0263540) | |
|---|---|
| Concepts | Sign or Symptom (T184) |
| English | Complete loss of nails, Complete nail loss, NAIL LOSS, OHM - Onychomadesis, Onychomadesis, Spontaneous shedding of nail from nail matrix |
| Spanish | defluvium unguium, onicomadesis, perdida completa de las unas |
| Parent Concepts | Nail Diseases (C0027339) |
| Sources | DXP, OMIM, SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
ANONYCHIA (C0265998) | |
|---|---|
| Concepts | Congenital Abnormality (T019) |
| ICD9 | 757.5 |
| English | ANN - Anonychia, ANONYCHIA, ANONYCHIA CONGENITA, Congenital absent nails, HYPONYCHIA CONGENITA |
| Spanish | anoniquia, ausencia congenita de unas |
| Parent Concepts | Amelia (C0002447), Congenital anomaly of nail (C0265997), Perodactylia (C0432045) |
| Sources | MTH, MTHICD9, OMIM, SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
