Stains And IHCs

Question 1

Melanocytic neoplasms

Answer 1

Melan-A Red, Fontana Massons, cytokeratin, vimentin

Question 2

B-cell LSA

Answer 2

PAX-5, CD20, CD79a

Question 3

T-cell LSA

Answer 3

CD-3

Question 4

Epithelial neoplasms

Answer 4

Pancytokeratin

Question 5

Mesenchymal neoplasms

Answer 5

Vimentin

Question 6

Hemangiosarcoma

Answer 6

CD-31, Factor VIII

Question 7

Transitional cell carcinoma

Answer 7

Uroplakin

Question 8

Islet cell tumors

Answer 8

Insulin

Question 9

Neuroendocrine

Answer 9

Synaptophysin, Chromagranin

Question 10

Thyroid follicular tumor

Answer 10

Thyroglobulin, TTF-1

Question 11

Thyroid c-cell tumor

Answer 11

Calcitonin, TTF-1

Question 12

Parathyroid tumor

Answer 12

Parathyroid

Question 13

Keratinized squamous epithelium

Answer 13

CK1

Question 14

Cornea

Answer 14

CK3

Question 15

Nonkeratinized epithelia

Answer 15

CK4, 13

Question 16

Basal cells of glandular and squamous epithelium, myoepithelium, mesothelium

Answer 16

CK5, 14, 17

Question 17

Squamous epithelium

Answer 17

CK6, 16

Question 18

Simple epithelium, superficial squamous epithelium

Answer 18

CK7, 8, 18, 19

Question 19

Simple epithelium of GI tract, Merkel cells, urothelium

Answer 19

CK20

Question 20

Mesothelioma

Answer 20

Keratin, vimentin

Question 21

Synovial cell sarcoma

Answer 21

Cytokeratin, vimentin

Question 22

Carcinosaroma

Answer 22

Cytokeratin, vimentin

Question 23

PNST

Answer 23

S-100, GFAP

Question 24

Smooth muscle tumor

Answer 24

Actin, Desmin, SMA

Question 25

Skeletal or cardiac muscle tumor

Answer 25

Actin, Desmin, Myoglobin, PTAH

Question 26

Plasma cell tumor

Answer 26

MUM-1, light chains

Question 27

Histiocytic tumor

Answer 27

CD68, IBA-1, Lysozyme

Question 28

Mast cell tumor

Answer 28

CD117 (CKIT), Giemsa, Toluidine blue, Luna, PAS, CD 25

Question 29

Myoepithelium

Answer 29

P63

Question 30

Myofibroblasts and myoepithelium

Answer 30

Calponin

Question 31

GIST

Answer 31

CD117 (CKIT)

Question 32

Nephroblastoma

Answer 32

WT-1

Question 33

Neuroblastoma

Answer 33

NFP

Question 34

Pulmonary adenocarcinoma

Answer 34

TTF-1

Question 35

Clara cells

Answer 35

TTF-1

Question 36

Natural killer cells

Answer 36

CD56

Question 37

Hemosiderin

Answer 37

Prussian Blue

Question 38

Collagen-blue staining

Answer 38

Masson’s trichrome

Question 39

NK cells

Answer 39

CD161

Question 40

Goblet cells

Answer 40

CK20

Question 41

Rhabdomyosarcoma

Answer 41

PTAH, myoglobin, actin, myosin, myogenin, myod1

Question 42

Adipose tissue

Answer 42

Oil Red O & Sudan Black

Question 43

Osteoid

Answer 43

Von Kossa

Question 44

Osteoclasts

Answer 44

TRAP

Question 45

Mucin

Answer 45

Alcian Blue

Question 46

Elastic fibers

Answer 46

Van giesen

Question 47

Equine melanoma

Answer 47

PNL2, not MelanA!