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Flashcards in Soft tissue tumors Deck (65)
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1

____ is a benign tumor of adipose tissue.

lipoma

2

What is needed to really the difference between lipoma and liposarcoma?

Histology

3

What is the characteristic cell of liposarcoma?

lipoblast- bizarre nucleus and vesicles of lipid in cytoplasm

4

____ is the most common benign soft tissue tumor in adults.

lipoma

5

_____ is the most common malignant soft tissue tumor in adults.

liposarcoma

6

What are the 2 types of reactive proliferations

nodular fasciitis and myositis ossificans

7

____ is a rapidly growing, small benign fibrous proliferation on the subcutis, usually encountered as a small mass.

nodular fasciitis

8

Who is nodular fasciitis most prevalent in? What is characteristic about the history?

Young adults-- rapid growth

9

Where does nodular fasciitis commonly appear?

arms, esp flexor aspects of forearms, subdermal fat

10

Where and when does mysotitis ossificans occur?

lower limb, blunt trauma

11

_____ is reactive bone formation in muscle as a result of injury.

myositis ossificans

12

What is seen with mysositis ossificans histologically? How is it differentiated from malignancy?

woven bone in granulation tissue. Bone will be well formed at periphery but immature at center. Malignancy will lack this maturation

13

What is encompassed in superficial fibromatoses?

small lesions of the hand (palmar, Dupuytren contraction, knuckle pads, infantile digital fibromatoses)
Feet (planter/Ledderhose)
Penis (penile/ Peyronie)

14

What is the most common superficial fibromatoses?

palmar

15

Age group, uni or bilateral, and sex of palmar fibromatoses

increases over 40, men (until over 80), frequently bilateral

16

Age group, and uni or bilateral of plantar fibromatosis

younger age group, bilateral

17

What characterizes infantile digital fibromatosis?

peculiar inclusion like condensations of cytoplasmic actin

18

Penile fibromatoses are often associated with what?

other superifcial fibromatoses

19

What fingers are most commonly afftected by Dupuytrens?

ring and pinky

20

T of F Dupuytrens progresses slowly and is usually painless.

T

21

What happens to the palmar aponeurosis in Dupuytrens contracture

becomes hyperplastic and undergoes contracture

22

What is encompassed in deep fibromatosis?

aggressive fibromatosis, musculoaponeurotic fibromatosis, desmoid tumors

23

Describe the deep fibromatosis seen in the pediatric population.

female, most are extra-abdominal

24

Describe the deep fibromatosis in pt in late 20s.

female, most are of abdominal wall

25

Describe deep fibromatosis of later adult years

no sex presdis., fewer abdominal tumors

26

T of F Deep fibromatosis tumors are large and local control can prove difficult, but despite their capacity for local aggression, deep fibromatosis do not metastasize.

T

27

What is seen with deep fibromatosis histologically?

bland fibroblast prolif, NOT monoclonal

28

____ is a tumor of mesenchymal cell origin that is composed of malignant fibroblasts in a collagen background

fibrosarcoma

29

Where does fibrosacroma of bone usually happen?

metaphysis of long bones in lower extremities like femur and tibia and pelvis.

30

Age and sex of fibrosarcoma of bone

men, 4th decade painful