1. Presentation 2: dermat/o, melan/o, derma, and onych/o
Medical terminology
By Loredana T. Lungu

2. Dermatology
Dermatology is the branch of medicine dealing with
the skin and its diseases, a unique specialty with both
medical and surgical aspects.

3. Dermatologist
A dermatologist takes care of diseases, in the widest
sense, and some cosmetic problems of the skin,
scalp, hair, and nails

4. Melanoma
Melanoma is the most dangerous type of skin cancer. It is the
leading cause of death from skin disease.
It involves cells called melanocytes, which produce a skin pigment
called melanin. Melanin is responsible for skin and hair color.
Melanoma can also involve the colored part of the eye.

5. Melanoma

6. Melanoma of the eye

7. Melanoma

8. Melanosis coli
Melanosis coli is a condition usually associated with
chronic laxative use in which dark pigment is
deposited in the lamina propria (one of the lining
layers) of the large intestine (colon). The pigment
deposition results in a characteristic dark brown to
black discoloration of the lining of the large intestine.

9. Melanosis coli in the caecum

10. Dermatitis
Dermatitis is a general term that describes an inflammation of the
skin. There are different types of dermatitis, including seborrheic
dermatitis and atopic dermatitis (eczema). Although the disorder
can have many causes and occur in many forms, it usually
involves swollen, reddened and itchy skin.

11. Seborrheic Dermatitis

12. Atopic dermatitis

13. Contact dermatitis

14. Onycomycosis
Onychomycosis ,also known as “dermatophytic
onychomycosis”, “ringworm of the nail,” and “tinea
unguium”,means fungal infection of the nail. It is the most
common disease of the nails and constitutes about a half of all
nail abnormalities.

15. Onycomycosis

16. Onychophagia
Onychophagia or nail biting is a common oral compulsive habit
in children and adults.

17. Onychophagia

18. Onychoschizia
Onychoschizia, commonly known as nail splitting but also known
as onychoschisis or lamellar dystrophy, is a condition that causes
horizontal splits within the nail plate.

19. Onychoschizia