What are the differential diagnosis for longitudinal melanochyia?
- A
- B
- C
- D
- E
A: Melanotic macula of the nail unit
B: Nail matrix nevus
C: Onychomycosis
D: Subungual Hematoma
E: Subungual Melanoma
What are the ABCDEF for subungual malenoma?
A: peak incidence?
B: breadth greater than?
C:
D:
E:
F:
A: Age: Peak incidence: 5th to 7th decade of life,
African-American > Native American > Asian
B: Brown-Black band with breadth greater than 3mm
Border irregular/blurred
C: Change in nail band morpology despite tx
D: Digit involved Thumb> Hallux>index finger > multiple digits dominant hand
E: Extension of the the brown-black pigment of the nail bed, nail matrix and/or nail plate onto the adjacant cuticle or proximal and lateral nail folds
F: Family or personal history
What are some local and regional causes of melanonychia?
1.?
2.?
3.?
4.?
1. Trauma (acute or chronic): Multiple bands
2. Poor fitting shoes
3. Radiation therapy
4. Ultraviolet light
What are some of the systemic causes of melannychia?
1. ?
2. ?
3. ?
4. ?
5. ?
1. Addison Disease
2. Cushing Syndrome
3. Hyperthyroidism
4. Acquired immunodificiency syndrome
5. Malnutrition/ Vitamin B deficincy
