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174 Cards in this Set

  • Front
  • Back
Ornithine Decarboxylase is a marker for what and can be found in which layer of the epidermis?
Found in basal cells
-Marker for proliferative activity
Name 6 things that simulate the cells in the basal layer
1) Trauma 4) Estrogens
2) UV 5) B-agonists
3) EGF 6) Tumor promotors
What 3 things inhibit cells in the basal layer
1) Protein deprivation in psoriatic skin
2) Retinoids
3) Steroids
What 5 proteins are upregulated during hyper proliferative states?
1) K6 4)a3b
2) K16 5) Integrin
3) Ki-67
What disease is due to decreased lamellar granules?
Flegel's Disease
This disease is characterized by uniformly abnormal or absent lamellar granules
Harlequin Ichthyosis
What is the gene defect seen with Harlequin Ichthyosis?
ABCA12
This type of Ichthyosis is caused by steroid sulfatase missing from lamellar granules
X-linked Ichthyosis
Prenatal diagnosis of this disease will show, decreased estrogen levels and non-hydrolyzed sulfated steroids in maternal urine.
X-linked Ichthyosis
Naxos syndrome is associated with what desmosomal protein?
Plakoglobin
Desmoplakin I/II is associated with this disease
Carvajal Syndrome
Envoplakin is one of the antigens in this blistering disorder
Paraneoplastic Pemphigus
All forms of EB Simplex are due to which 3 antigens?
1) K5
2) K14
3) Plectin
EB Simplex-muscular dystrophy is related to a defect in what protein?
Plectin
Junctional EB, Herlitz type (lethal) is cause by defects in what protein?
Laminin 5
Junctional EB, Herlitz type (lethal) is cause by defect in this gene.
LAMB3 gene
Junctional EB, Pyloric atresia is cause by defects in this protein.
a6b4 integrin
DEB, Bart's Syndrome and EB acquisita are all caused by defects in this type of collagen.
Collagen 7
Another name for BPAg1 is...
Desmoplakin
Another name for BPAg2 is...
Type 17 Collagen
Desmoplakin I/II is associated with this disease
Carvajal Syndrome
Envoplakin is one of the antigens in this blistering disorder
Paraneoplastic Pemphigus
All forms of EB Simplex are due to which 3 antigens?
1) K5
2) K14
3) Plectin
EB Simplex-muscular dystrophy is related to a defect in what protein?
Plectin
Junctional EB, Herlitz type (lethal) is cause by defects in what protein?
Laminin 5
Junctional EB, Herlitz type (lethal) is cause by defect in this gene.
LAMB3 gene
Junctional EB, Pyloric atresia is cause by defects in this protein.
a6b4 integrin
DEB, Bart's Syndrome and EB acquisita are all caused by defects in this type of collagen.
Collagen 7
Another name for BPAg1 is...
Desmoplakin
Another name for BPAg2 is...
Type 17 Collagen
The NC16A domain of BPAg2 interacts with which 2 proteins extracellularly?
1) a6b4 integrin
2) Laminin 5
The Lamina Densa is made of which type of collagen?
Type 4 Collagen
The Sublamina Densa is made up of which type of collagen?
Type 7 Collagen
Keratinocytes produce what 2 growth factors for melanocytes?
1) beta-FGF
2) TGF-alpha
Keratinocytes produce these 3 inhibitory factors for melanocytes?
1) IL-1
2) IL-6
3) TGF-beta
Oculocutaneous Albinism (OCA) type 1 is caused by a defect in melanin synthesis due to a defect in what?
Tyrosinase
Oculocutaneous Albinism (OCA) type 2 is caused by a defect in melanin synthesis due to what gene?
P-gene
Oculocutaneous Albinism (OCA) type 3 is caused by a defect in melanin synthesis due to what gene?
TRP-1 gene
Langerhans cells will stain positive to what 5 stains?
1) CD45
2) S-100
3) CD1a
4) Actin
5) Vimentin
Langerhans cells are central to the pathogenic processes of what 4 diseases?
1) Atopic Dermatitis
2) Psoriasis
3) Allergic Contact Dermatitis
4) Infections like Leishmaniasis
Langerhans cells adhere to keratinocytes cells by what?
E-Cadherin
Langerhans cells produce what cytokine?
IL-1
What 4 disease processes involve Langerhans cells?
1) Letterer-Siwe Disease
2) Hand-Schuller-Christian dz
3) Eosinophilic Granuloma
4) Hashimoto-Pritzker Disease
True or False, Langerhans cell cannot be infected with HIV?
False, Langerhans cell CAN be infected by HIV
What 2 finding on EM characterize Langerhans cells?
1) Kidney shaped nucleus
2) Birbeck granules
Name the 5 cell types commonly found in the Dermis
1) Fibroblasts
2) Mast Cells
3) Monocytes
4) Phagocytes
5) Glomus cells
Collagen constitutes what % of the dry weight of skin?
75%
What vitamin is a required cofactor for production of collagen?
Vitamin C
(C= Collagen)
What group of syndromes is characterized by excessive stretchability and fragility of the skin with tendency toward easy scar formation with "fish-mouth" scars?
Ehlers-Danlos Syndrome
What disorder is caused by abnormal cross linking of collagen due to mutated beta-cystathione synthase?
Homocystinuria
This AR disorder is associated with collagen fibrillinogenesis
Tenascin-X
What 6 diseases are caused by defects in Elastin?
1) Cutis Laxa
2) Marfan's Syndrome
3) Congenital Contractural Arachnodactyly
4) Pseudoxanthoma Elasticum
5) Buschke-Ollendorf Syndrome
6) Anetoderma
Cutis Laxa is associated with a defect in what gene?
Fibulin 5 gene
Marfan's syndrome is associated with what elastic fiber disorder?
Decreased Fibrillin 1
Congenital Contractural Arachnodactyly is associated with a mutation in what?
Fibrillin 2
Pseudoxanthoma Elasticum is associated with calcium deposition caused by what gene defect?
ABCC6 Gene defect
Buschke-Ollendorf Syndrome is caused by what gene defect?
LEMD3 gene defect
Decreased desmosine is seen with which Elastin Disease?
Anetoderma
Name the 2 "CD"s that all phagocytic skin macrophages express in the dermis
1) CD11c
2) CD6
B2 integrin binds to what to stimulate phagocytosis in dermal macrophages?
C3b+
What on the surface of macrophages binds to CAM-2?
CD11a which = LFA
What on the surface of macrophages binds to LCAM?
CD11b which = Mac-1
Macrophages kill bad guys as part of the immune system by what 5 processes?
1) Phagocytic
2) Antigen processing & presenting to naive T-cells
3) Microbiocidal
4) Tumoricidal
5) Secretory (cytokines)
Macrophages are microbiocidal through the production and release of what 3 things?
1) Lysozyme
2) Peroxide
3) Superoxide
What are the 3 types of mast cells in the body?
1) T Type (GI and resp. mucosa)
2) TC Type (skin, GI, submucosa
3) C type (skin, lymph nodes)
Where is the greatest density of Mast cells found in the skin?
Papillary Dermis
What 5 diseases are associated with Mast Cells?
1) Mastocytosis
2) Solitary Mastocytoma
3) Diffuse Erythrodermic Mastocytosis
4) TMEP
5) UP
What type of stem cells are Mast cells derived from?
Bone marrow-residing CD34+ stem cells
Proliferation of Mast cells depends on what receptor?
C-kit receptor and its ligand stem-cell factor (SCF)
Mutations in c-kit may result in what 2 diseases?
1) Mastocytosis
2) Piebaldism
What 4 stains are positive for Mast Cells?
1) C-Kit
2) CD34
3) Giemsa
4) Leder
What cells produce and store inflammatory mediators in preformed secretory granules?
Mast Cells
Mast cells produce what IL?
IL-8
IL-8 is a strong chemotactic factor for what cell?
Neutrophils
What are the 3 preformed mediators stored in mast cells?
1) Tryptase
2) Heparin
3) Histamine
Degranulation of Mast cells produces what 4 results?
1) Vascular smooth muscle contraction
2) Increased vascular permeability
3) Tissue Edema
4) Recruitment of inflammatory cells
What type of reaction do mast cells participate in?
1) Immediate-Type Hypersensitivity Reactions
What are the 15 Mast cell mediators?
Tryptase, Chymase, Cathepsin G, Histamin, Heparin, IL-4, IL-V, IL-3, IL-5, GM-CSF, TNF-alpha, CCL3, Leukotrienes C4D4EF, Platelet activating factor
What 2 disease groups are associated with Glomus cells?
1) Glomus Tumor
2) Glomangioma
Name the 5 proteins in the Plakin family.
1) Envoplakin
2) Periplakin
3) Desmoplakin
4) BPAg1
5) Plectin
EB Simplex-Dowling Meara is associated with which 2 keratins?
1) K5
2) K14
Plectin is associated with what inherited disease and what autoimmune disease?
Inherited: EB Simplex- Muscular Dystrophy type
Autoimmune: Paraneoplastic Pemphigus
BPAg2 is associated what inherited dz and what 2 autoimmune dz.'s?
Inherited: GABEB
Autoimmune: EB, CP
a6b4 integrin is associated with what inherited dz and what autoimmune dz?
Inherited: JEB w/ pyloric atreasia
Autoimmune: b4 integrin ocular CP
Laminin 5 is associated with what inherited dz and what autoimmune dz?
Inherited: Junctional EB
Autoimmune: CP
Collagen 7 is associated with what inherited dz and what 2 autoimmune dz?
Inherited: Dystrophic EB- collagenous domain
Autoimmune:
1) EBA -non collagenous domain
2) Bullous LE
Granulation tissue primarily contains what type of collagen?
Type 3 collagen
What do the remaining hair follicles develop during gestations?
4-5 months gestation, they develop in a cephalic to caudal direction
ORS makes what type of keratin?
Trichilemmal keratin
Which of the 3 parts of the IRS keratinizes first?
Henle's Layer
What are the 3 parts of the IRS? Outside --> Inside?
Henle-->Huxley-->Cuticle
What are the 3 parts of the hair shaft Outside --> Inside?
Cuticle-->Cortex-->Medulla
What type of hair disorder is seen with chemo?
Anagen Effluvium
What hair disorder is characterized by abrupt cessation of mitotic activity in rapidly dividing hair matrix cells?
Anagen Effluvium
Mutation in this gene causes hair to be 30-50% longer than usual.
FGF5 gene
Mutations in the Hairless gene and Vitamin D receptor causes what?
Atrichia
These 3 molecules are important for transition from Telogen --> Anagen
1) Sonic Hedgehog gene (SHH)
2) Patched gene (receptor for SHH)
3) Beta-Catenin
Name 7 things that can cause Telogen Effluvium.
1) Stress
2) Endocrine problems
3) Nutritional deficiency
4) Hypervitaminosis A
5) Delivery of baby
6) Fever
7) Drugs
Name 7 diseases that are associated with defects of the hair shaft.
1) Monilethrix
2) Netherton's Syndrome
3) Pili annulati
4) Menkes Disease
5) Uncombable Hair Syndrome
6) Hereditary Mucoepithelial Dysplasia
7) Nanos Syndrome
What disorder is causes the "Beaded Hair" with alternating thick and thin areas?
Monilethrix
Monilethrix is caused by a defect in this hair keratin.
Keratin hHb6
This syndrome is presents with trichorhexis invaginatum or "Bamboo Hair"
Netherton's Syndrome
Defect in what gene causes "Bamboo Hair"?
Serine-Protease Inhibitor Gene or SPINK5 gene
What disorder causes "Banded Hair"?
Pili Annulati
This disease causes twisted hair or "Pili Torti".
Menkes Disease
(Menkes "Kinky" Hair syndrome)
Menkes Disease is caused by a defect in what?
Defect in Copper Transporter
What do kind of hair do you see with Uncombable hair syndrome?
Triangle-shaped hair
What 3 symptoms characterize Hereditary Mucoepithelial Dysplasia?
1) Red Gums
2) KP
3) Episodic hair loss
What disorder causes red gums?
Hereditary Mucoepithelial Dysplasia
Nanos Syndrome is caused by a mutation in what protein?
Plakoglobin
What disease is characterized by Wooly hair, hyperkeratosis of the palms & soles, and cardiac arrhythmias?
Nanos Syndrome
What adnexal gland is under androgenic hormonal control?
Sebaceous Glands
Name the 5, free sebaceous glands (not associated with hair) found on the body.
1) Montgomery's areolar tubercles
2) Fordyce's spots
3) Meibomian Glands
4) Glands of Zeis
5) Tyson's glands
What and where are the Glands of Moll?
Free standing Apocrine glands on the eyelid margin
What is the name for free standing sebaceous glands on the nipple and areola?
Montgomery's areolar tubercles
Where do you find Fordyce's spots? What are they?
Free standing sebaceous glands on the vermillion border of the lips and on the buccal mucosa
Where are Meibomian glands located?
Deep on the eyelids, embedded in the tarsal plate
What are Meibomian glands?
Free-standing modified sebaceous glands that from the most exterior (lipid) layer of the tear film, preventing evaporation
What is a Chalazion?
Inflammation of the Meibomian gland.
Where are the Glands of Zeis located?
Superficial eyelid margin
What are the Glands of Zeis and what function do they serve?
Free-standing sebaceous glands, that also contribute to the exterior lipid layer of the tear film
What is a Hordeolum?
Inflammation of the Glands of Zeis.
What do we call the Apocrine glands on the eyelid margin?
Glands of Moll
What type of secretion do the Glands of Moll exhibit?
Decapitation secretion. (apocrine)
What is the name for free-standing sebaceous glands on the genitalia?
Tyson's Glands
Where are Tyson's Glands located?
Free-standing sebaceous glands on the genitalia
Apocrine glands are innervated by what?
Sympathetic fibers
Eccrine glands are found everywhere except what 6 areas?
1) Vermillion border of the lips
2) Nail beds
3) Labia Minora
4) Glans Penis
5) Clitoris
6) External auditory canal
What type of gland is on the vermillion border of the lips?
Sebaceous glands, Fordyce spots
What 2 types of glands are on the genitalia?
Apocrine glands AND
Modified Sebaceous glands (Tyson's Glands)
What type of gland is found ON the breast (nipple & areola)?
Sebaceous glands, (Montgomery's)
What type of gland are the mammary glands, found IN the breast?
Apocrine glands (Mammary Glands)
What 2 types of glands are around the eyelids?
1) Apocrine glands (Moll's)
2) Sebaceous glands
-Meibomian (deep-chalazion)
-Zeis (SF-Hordeolum)
What disease is caused by occlusion of apocrine ducts?
Fox-Fordyce Disease
What disease is characterized by Chromhidrosis (pigmented sweat)?
Fox-Fordyce Disease
What chemical causes chromhidrosis seen in Fox-Fordyce disease?
Lipofuscin
What are the 2 types of free nerve endings found in the skin?
1) Penicillate Fibers
2) Papillary Nerve endings
Which type of free nerve endings are found sub-epidermally in hair-bearing skin?
Penicillate Fibers
Penicillate fibers detect what 3 things?
1) Pain
2) Touch
3) Temperature
Where can you find papillary free nerve endings in the skin?
At the orifice of the hair follicle
What type of free nerve ending is particularly sensitive to cold?
Papillary nerve endings
Name the 3 corpuscular receptors in the skin.
1) Meissner's Corpuscle
2) Pacinian (Vater-Pacini) Corpuscle
3) Krause End bulbs
Which corpuscular receptor detects touch and light pressure?
Meissner's Corpuscle
Which corpuscular receptor is in weight-bearing sites of the body?
Pacinian (Vater-Pacini) Corpuscle
Meissner's corpuscles are found where?
Dermal papilla of digital skin
Where can you find Pacinian corpuscles in the skin?
In the deep dermis and SQ of weight-bearing sites
Which corpuscular receptor detects vibrational stimuli?
Pacinian Corpuscles
What corpuscular receptor is found in the genitals and lips?
Krause End bulbs
What group of blistering disorders have a positive DIF in the intercellular space (fish-net pattern)?
All types of Pemphigus
What immunoglobulin is deposited in the intercellular space in Pemphigus?
IgG
All types of pemphigus deposit IgG in the intercellular space except 1.
Except IgA Pemphigus
What 2 types of pemphigus have a positive DIF in the intercellular space AND BMZ?
1) Paraneoplastic pemphigus
2) Drug-induced pemphigus
What group of blistering disorders have a positive DIF to just the BMZ?
Pemphigoid
What immunoglobulin is deposited in the BMZ with the pemphigoid group?
C3 & IgG
C3 is more intense
What 5 disorders will have DIF positive with IgG and C3 in the BMZ?
1) BP
2) HG
3) CP
4) EBA
5) Bullous LE
DIF in the BMZ with IgG > C3 favors what group of diseases?
Pemphigoid
DIF in the BMZ with IgG>C3 favors what 2 diseases?
1) EBA
2) Bullous LE
What disorder will have linear deposition of IgA at BMZ?
Linear IgA bullous dermatosis
On salt-split skin BP will show deposits on what side of the split?
Epidermal side (roof)
On salt-split skin EBA will show deposits on what side of the split?
Dermal side (floor)
What 3 diseases will have deposits on the DERMAL side or Floor on a salt-split skin test?
1) EBA
2) Bullous LE
3) CP
What disease will show IgG and IgA within dermal blood vessels and the BMZ?
Porphyrias
PCT and pseudoporphyria
What disease will have positive DIF in the BMZ and in the Papillary Dermis?
Dermatitis Herpetiformis
What disease has a DIF showing IgA and C3 in the papillary dermis and along the BMZ?
Dermatitis Herpetiformis
In DH, 100% of biopsies taken from normal appearing skin will show what?
IgA deposition
Circulating IgG anti-intercellular antibodies in the serum are associated with what 4 diseases?
1) PV
2) PF
3) PNP
4) Drug-induced Pemphigus
What disease will show circulating IgA Anti-intercellular antibodies?
IgA Pemphigus
What 2 diseases will show circulating IgG Anti-BMZ antibodies?
BP and EBA
What disease will show circulating IgA Anti-BMZ antibodies?
Adult and childhood forms of Linear IgA disease
DH patients can have circulating antibodies to what 3 proteins?
1) Anti-gliadin
2) Anti-reticular
3) Anti-endomysial
In Discoid LE, where is the best place to biopsy?
Oldest, untreated lesion on non-sun-exposed skin
DIF showing IgG and IgM along the DE junction leads what diagnosis?
Discoid Lupus
DIF showing IgG and IgM along the DE junction and basal keratinocytes leads to what diagnosis?
SCLE
Cytoid bodies on DIF should make you think of what CT disease?
Lupus