ABSITE Review - Plastics

Question 1

What are the antigen presenting cells in the skin?

Answer 1

Langerhans cells

Question 2

What type of UV radiation is responsible for chronic sun damage?

Answer 2

UV B

Question 3

What are the risk factors for melanoma?

Answer 3

Dysplastic, atypical or large congenital nevi
Familial BK mole syndrome
Xeroderma pigmentosum
Fair complexion, easy sunburn, intermittent sunburns, previous skin cancers, previous XRT

Question 4

What is the MC melanoma site for men and women?

Answer 4

Men - back

Women - legs

Question 5

Melanoma originates from…

Answer 5

neural crest cells (melanocytes) in basal layer epidermis

Question 6

What is the MC location for distant melanoma metastases?

Answer 6

Lung

Question 7

What is the MC metastases to small bowel?

Answer 7

Melanoma

Question 8

What is the MC type of melanoma?

Answer 8

Superficial spreading melanoma

Question 9

WHat is the most aggressive type of melanoma?

Answer 9

Nodular

Question 10

When you perform a SLN biopsy in melanoma?

Answer 10

When melanoma > 1mm deep

Question 11

What are the Clark’s levels for melanoma?

Answer 11

I - epidermis BM intact
II - papillary dermis through BM
III - Junctional dermis between papillary and reticularis dermis
IV - Reticular dermis
V - Fat

Question 12

What are the margins needed for melanoma resection depending on size?

Answer 12

1cm margin
1-4mm –> 2cm margin
>4mm –> 2-3cm margin

Question 13

What is the MC skin cancer in USA?

Answer 13

Basal cell carcinoma

Question 14

What are the clinical and pathologuc characteristic of basal cell carcinoma?

Answer 14

Clinical - Pearly appereance, rolled borders

Pathology - peripheral palisading of nuclei and stromal retraction

Question 15

T/F: SCC metastisize more often than BCC

Answer 15

TRUE

Question 16

What are risk factors for SCC?

Answer 16

actinic keratoses, xeroderma pigmentosum, Bowen’s disease, atrophic epidermis, arsenics, hydrocarbons, chlorophenols, nitrates, HPV, immunosuppresion, sun exposure, fair skin, XRT exposure, previous skin CA

Question 17

What are the two MC soft tissue sarcomas?

Answer 17

#1 - malignant fibrous histiosarcoma
#2 - liposarcoma

Question 18

What are the criteria for excisional vs incisional biopsy?

Answer 18

Excisional biospy if mass 4cm (may need to eventually resect biopsy skin site if biopsy shows sarcoma)

Question 19

What kind of metastasis is more common in sarcomas?

Answer 19

Hematogenous to Lung

Question 20

What are the margins needed for sarcoma resection?

Answer 20

3cm margins and at least 1 uninvolved fascial plane

Question 21

Which sarcomas may benefit from preop XRT and chemotherapy?

Answer 21

Tumors > 10cm

Question 22

What is the MC sarcoma in children?

Answer 22

Rhabdomyosarcoma

Question 23

What is the MC location for a desmoid tumor?

Answer 23

Anterior abd wall

Question 24

When a desmoid tumor can occur?

Answer 24

During or after pregnancy; can also occur after trauma or surgery

Question 25

In hidradenitis, there is an infection of?

Answer 25

Apocrine sweat glands