Learn and talk about Thrombocytopenic purpura, Coagulopathies, Vascular-related cutaneous conditions

Thrombocytopenic purpura
Classification and external resources
MeSH	D011696

Thrombocytopenic purpura are purpura associated with a reduction in circulating blood platelets which can result from a variety of causes,^[1] such as kaposi sarcoma.

Types [edit]

By tradition, the term idiopathic thrombocytopenic purpura is used when the cause is idiopathic. However, most cases are now considered to be immune-mediated.

Another form is thrombotic thrombocytopenic purpura.

References [edit]

^ "thrombocytopenic purpura" at Dorland's Medical Dictionary

Diseases of the skin and appendages by morphology

Growths

Epidermal	wart callus seborrheic keratosis acrochordon molluscum contagiosum actinic keratosis squamous cell carcinoma basal cell carcinoma merkel cell carcinoma nevus sebaceous trichoepithelioma

Pigmented	Freckles lentigo melasma nevus melanoma

Dermal and subcutaneous	epidermal inclusion cyst hemangioma dermatofibroma keloid lipoma neurofibroma xanthoma Kaposi's sarcoma infantile digital fibromatosis granular cell tumor leiomyoma lymphangioma circumscriptum myxoid cyst

Rashes

With
epidermal
involvement

Eczematous	contact dermatitis atopic dermatitis seborrheic dermatitis stasis dermatitis lichen simplex chronicus Darier's disease glucagonoma syndrome langerhans cell histiocytosis lichen sclerosus pemphigus foliaceus Wiskott-Aldrich syndrome Zinc deficiency

Scaling	psoriasis tinea (corporis cruris pedis manuum faciei) pityriasis rosea secondary syphilis mycosis fungoides systemic lupus erythematosus pityriasis rubra pilaris parapsoriasis ichthyosis

Blistering	herpes simplex herpes zoster varicella bullous impetigo acute contact dermatitis pemphigus vulgaris bullous pemphigoid dermatitis herpetiformis porphyria cutanea tarda epidermolysis bullosa simplex

Papular	scabies insect bite reactions lichen planus miliaria keratosis pilaris lichen spinulosus transient acantholytic dermatosis lichen nitidus pityriasis lichenoides et varioliformis acuta

Pustular	acne vulgaris acne rosacea folliculitis impetigo candidiasis gonococcemia dermatophyte coccidioidomycosis subcorneal pustular dermatosis

Hypopigmented	tinea versicolor vitiligo pityriasis alba postinflammatory hyperpigmentation tuberous sclerosis idiopathic guttate hypomelanosis leprosy hypopigmented mycosis fungoides

Without
epidermal
involvement

Red

Blanchable
Erythema

Generalized	drug eruptions viral exanthems toxic erythema systemic lupus erythematosus

Localized	cellulitis abscess boil erythema nodosum carcinoid syndrome fixed drug eruption

Specialized	urticaria erythema (multiforme migrans gyratum repens annulare centrifugum ab igne)

Nonblanchable
Purpura

Macular	thrombocytopenic purpura actinic purpura

Papular	disseminated intravascular coagulation vasculitis

Indurated

Miscellaneous
disorders

Ulcers

Hair	telogen effluvium androgenic alopecia trichotillomania alopecia areata systemic lupus erythematosus tinea capitis loose anagen syndrome lichen planopilaris folliculitis decalvans acne keloidalis nuchae

Nail	onychomycosis psoriasis paronychia ingrown nail

Mucous membrane	aphthous stomatitis oral candidiasis lichen planus leukoplakia pemphigus vulgaris mucous membrane pemphigoid cicatricial pemphigoid herpesvirus coxsackievirus syphilis systemic histoplasmosis squamous cell carcinoma

Pathology: hematology, hematologic diseases of RBCs and megakaryocytes / MEP (D50-69,74, 280-287)

Red
blood cells

↑

Poly- cythemia	Polycythemia vera

↓

Anemia

Nutritional

Micro-: Iron deficiency anemia
- Plummer-Vinson syndrome

Macro-: Megaloblastic anemia
- Pernicious anemia

Hemolytic
(mostly Normo-)

Hereditary	enzymopathy: G6PD glycolysis PK TI HK hemoglobinopathy: Thalassemia alpha beta delta Sickle-cell disease/trait HPFH membrane: Hereditary spherocytosis Minkowski-Chauffard syndrome Hereditary elliptocytosis Southeast Asian ovalocytosis Hereditary stomatocytosis

Acquired	Autoimmune WAHA CAD PCH membrane PNH MAHA TM HUS Drug-induced autoimmune Drug-induced nonautoimmune Hemolytic disease of the newborn

Aplastic
(mostly Normo-)

Blood tests

MCV
MCHC
- Normochromic
- Hypochromic

Other

Coagulation/
coagulopathy

↑

Hyper- coagulability	primary: Antithrombin III deficiency Protein C deficiency/Activated protein C resistance/Protein S deficiency/Factor V Leiden Prothrombin G20210A acquired:Thrombocytosis essential DIC Congenital afibrinogenemia Purpura fulminans autoimmune Antiphospholipid

↓

Hypo-
coagulability

Thrombocytopenia	Thrombocytopenic purpura: ITP Evans syndrome TM TTP Heparin-induced thrombocytopenia May-Hegglin anomaly

Platelet function	adhesion Bernard–Soulier syndrome aggregation Glanzmann's thrombasthenia platelet storage pool deficiency Hermansky–Pudlak syndrome Gray platelet syndrome

Clotting factor	Hemophilia A/VIII B/IX C/XI von Willebrand disease Hypoprothrombinemia/II XIII Dysfibrinogenemia

M: MYL

cell/phys (coag, heme, immu, gran), csfs

rbmg/mogr/tumr/hist, sysi/epon, btst

drug (B1/2/3+5+6), btst, trns

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Thrombocytopenic purpura

Types [edit]

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References [edit]

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