Give me all the causes of echhymosis and approach
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Ecchymosis: Causes and Clinical Approach
Definition
Ecchymosis is a non-palpable, flat extravasation of blood into the skin and subcutaneous tissues, typically >3 mm in diameter (distinguishing it from petechiae which are <3 mm). Colloquially known as a "bruise," it results from extravasation of red blood cells outside blood vessels into the surrounding tissue.
Pathophysiology of Ecchymosis Formation
Ecchymosis results from disruption of normal hemostasis at one or more levels:
- Vascular integrity - fragile or damaged vessel walls
- Primary hemostasis - platelet plug formation (platelet count + function)
- Secondary hemostasis - coagulation cascade (fibrin clot formation)
- Fibrinolysis - excessive clot breakdown
Causes of Ecchymosis
I. Platelet and Vascular Disorders (Superficial Bleeding - Petechiae, Ecchymoses, Mucosal bleeding)
These typically produce spontaneous or immediately post-traumatic ecchymoses at superficial skin sites.
A. Thrombocytopenia (Decreased Platelet Count)
| Mechanism | Examples |
|---|---|
| Decreased production | Aplastic anemia, bone marrow infiltration (leukemia, lymphoma, myeloma), chemotherapy/radiotherapy, B12/folate deficiency, alcohol toxicity |
| Increased destruction - Immune | Immune thrombocytopenic purpura (ITP), drug-induced (heparin - HIT, quinine, sulfonamides), SLE, post-transfusion purpura |
| Increased destruction - Non-immune | DIC, TTP (thrombotic thrombocytopenic purpura), HUS, mechanical heart valves |
| Sequestration | Hypersplenism (portal hypertension, infiltrative disease) |
| Dilutional | Massive transfusion |
B. Qualitative Platelet Disorders (Normal Count, Abnormal Function)
| Type | Examples |
|---|---|
| Inherited | Glanzmann thrombasthenia (GPIIb/IIIa deficiency), Bernard-Soulier syndrome (GPIb deficiency), storage pool disease, Scott syndrome |
| Acquired | Aspirin, NSAIDs (COX inhibition - most common drug cause), clopidogrel/P2Y12 inhibitors, ticagrelor, uremia (renal failure), myeloproliferative neoplasms, paraproteinemias, cardiopulmonary bypass |
C. Vascular/Connective Tissue Disorders
| Condition | Notes |
|---|---|
| Senile purpura | Most common cause of easy bruising in elderly - loss of perivascular connective tissue support |
| Ehlers-Danlos syndrome | Connective tissue disorder, fragile vessel walls |
| Marfan syndrome | Vessel wall abnormality |
| Scurvy (Vitamin C deficiency) | Perifollicular hemorrhage, perivascular collagen deficiency |
| Cushing syndrome / corticosteroid excess | Skin atrophy, poor collagen support - classic ecchymoses |
| Hereditary hemorrhagic telangiectasia (HHT) | Recurrent mucosal and skin hemorrhage |
| Vasculitis | Palpable purpura (IgA vasculitis/Henoch-Schonlein, cryoglobulinemia) |
| Amyloidosis | "Pinch purpura," periorbital ecchymosis ("raccoon eyes") |
| Simple easy bruising (benign) | Common in women, no pathology found |
II. Coagulation Factor Deficiencies (Deeper Bleeding - Hematomas, Hemarthroses, Delayed Bleeding)
Although coagulation factor deficiencies classically cause deeper tissue bleeding, they also contribute to ecchymosis (especially large hematomas).
| Deficiency | Lab Pattern | Notes |
|---|---|---|
| Hemophilia A (Factor VIII) | aPTT ↑, PT normal | X-linked, most common severe inherited coagulopathy |
| Hemophilia B (Factor IX, Christmas disease) | aPTT ↑, PT normal | X-linked |
| Von Willebrand Disease (VWD) | aPTT ±↑, PFA-100 ↑ | Most common inherited bleeding disorder; types I, II, III |
| Factor XI deficiency | aPTT ↑ | Common in Ashkenazi Jews |
| Factor XII, HMWK, prekallikrein | aPTT ↑↑ | No bleeding tendency despite lab abnormality |
| Vitamin K deficiency | PT ↑, aPTT ↑ | Factors II, VII, IX, X, protein C/S dependent |
| Liver disease | PT ↑, aPTT ↑, thrombocytopenia | Complex coagulopathy - multiple factor deficiencies |
| Disseminated Intravascular Coagulation (DIC) | PT ↑, aPTT ↑, fibrinogen ↓, D-dimer ↑ | Consumption of all factors and platelets |
| Acquired inhibitors | aPTT ↑ (not corrected on mix) | Acquired hemophilia A, lupus anticoagulant |
| Anticoagulant therapy | Warfarin (PT↑/INR↑); heparin/LMWH (aPTT ↑); DOACs | Iatrogenic |
| Fibrinogen disorders | TT ↑↑, PT ↑↑, aPTT ↑↑ | Afibrinogenemia, dysfibrinogenemia |
III. Non-Hemostatic / Local Causes
- Trauma - most common cause overall; ecchymosis can track along fascial planes (e.g., Grey Turner sign in retroperitoneal hemorrhage, Cullen sign in periumbilical area)
- Post-procedural / surgical - common within 24 hours; usually from small vessel bleeding as local anesthetic epinephrine dissipates
- Hematoma - localized blood collection causing pressure, pain, and visible bruising
IV. Special Patterns to Recognize
| Pattern | Associated Cause |
|---|---|
| Periorbital "raccoon eyes" | Basilar skull fracture, amyloidosis |
| Battle's sign (mastoid ecchymosis) | Basilar skull fracture |
| Grey Turner's sign (flank) | Retroperitoneal hemorrhage (pancreatitis, AAA) |
| Cullen's sign (periumbilical) | Intraperitoneal hemorrhage (pancreatitis, ectopic pregnancy) |
| Perifollicular ecchymosis | Scurvy |
| Pinch purpura (eyelid) | Amyloidosis |
| Palpable purpura | Vasculitis (not true ecchymosis) |
| Easy bruising in a child | Must consider non-accidental injury (child abuse) |
| Ecchymosis with skin atrophy | Cushing's / long-term corticosteroids |
Approach to a Patient with Ecchymosis
Step 1: History
Key questions:
- Onset: spontaneous vs. post-traumatic? Timing after injury?
- Pattern: single site vs. multiple sites?
- Associated bleeding: epistaxis, gum bleeding, menorrhagia, GI bleeding, hemarthrosis, prolonged bleeding after cuts/dental work?
- Previous hemostatic challenges: surgeries, tooth extractions, circumcision, labor/delivery - bleeding with these?
- Drug history: aspirin, NSAIDs, warfarin, heparin, DOACs, antibiotics, chemotherapy, herbal supplements
- Family history of bleeding disorders
- Systemic illness: liver disease, renal failure, malabsorption, malignancy, autoimmune disease
- Alcohol use
Note: 18% of healthy women report easy bruising - isolated easy bruising without other features has a high rate of being benign.
Step 2: Physical Examination
- Distribution and size: Petechiae (pinpoint, <3mm) vs. ecchymosis (>3mm) vs. purpura
- Palpability: Non-palpable = ecchymosis/purpura; Palpable = vasculitis
- Location: Dependent areas (gravity-dependent = thrombocytopenia); Sun-exposed forearms in elderly (senile purpura); Periorbital, flanks, umbilicus (special patterns above)
- Skin quality: Thin/atrophic skin (corticosteroid use, aging); Hyperextensible (Ehlers-Danlos)
- Mucosal bleeding: Oral petechiae, gum bleeding
- Splenomegaly: Suggests hypersplenism or infiltrative disease
- Lymphadenopathy/hepatomegaly: Lymphoma, leukemia, liver disease
- Joint deformity: Hemophilia (hemarthroses)
- Signs of liver disease: Jaundice, spider angiomata, caput medusae
Step 3: Pattern Recognition
| Clinical Pattern | Likely Cause |
|---|---|
| Petechiae + mucosal bleeding, spontaneous | Thrombocytopenia or platelet dysfunction |
| Large ecchymoses + hemarthroses, delayed after trauma | Coagulation factor deficiency |
| Bruising after trivial trauma, elderly, sun-exposed forearms | Senile purpura |
| Easy bruising + weight gain + striae | Cushing syndrome |
| Easy bruising + jaundice + splenomegaly | Liver disease |
| Easy bruising + fever + organomegaly | Leukemia/lymphoma |
| Bruising + perifollicular hemorrhage + poor wound healing | Scurvy |
| Sudden onset ecchymosis + fever + coagulopathy | DIC |
Step 4: Initial Laboratory Investigations
First-line screening panel:
| Test | What it evaluates |
|---|---|
| CBC with peripheral smear | Platelet count; smear confirms true thrombocytopenia, blast cells, fragmented RBCs (TTP/DIC) |
| PT/INR | Extrinsic pathway (Factors VII, X, V, II, fibrinogen); elevated in liver disease, warfarin, Vitamin K deficiency |
| aPTT | Intrinsic pathway (Factors XII, XI, IX, VIII); elevated in hemophilia, heparin, VWD, lupus anticoagulant |
| Thrombin time (TT) | Fibrinogen function; elevated in DIC, afibrinogenemia, heparin |
| Fibrinogen level | Decreased in DIC, liver disease |
| Liver function tests | Liver disease coagulopathy |
| Renal function (BUN/Cr) | Uremic platelet dysfunction |
Second-line (based on screening results):
| Abnormality Found | Next Tests |
|---|---|
| Isolated aPTT ↑ | VWF antigen + activity, Factor VIII, Factor IX, mixing study |
| Isolated PT ↑ | Factor VII level, Vitamin K level |
| Both PT + aPTT ↑ | Fibrinogen, liver panel, DIC screen (D-dimer, FDP), Factor V, X |
| Thrombocytopenia | Peripheral smear, reticulocyte count, LDH, haptoglobin, DAT (Coombs), ANA, APLA |
| Normal all screening tests | PFA-100 (platelet function), VWF studies, platelet aggregation studies |
| aPTT ↑ not corrected on mixing study | Inhibitor screen (acquired hemophilia A, lupus anticoagulant) |
Step 5: Specialist Referral
- Hematology: Confirmed or suspected inherited/acquired coagulopathy, ITP, hemophilia, VWD
- Rheumatology: Vasculitis, SLE, connective tissue disease
- Dermatology: If skin-primary diagnosis needed
- Endocrinology: If Cushing syndrome suspected
- Hepatology: If liver disease is the underlying cause
Key Clinical Distinctions
| Feature | Platelet/Vascular | Coagulation Factor |
|---|---|---|
| Bleeding type | Skin, mucous membranes | Deep (joints, muscle, retroperitoneal) |
| Onset after trauma | Immediate | Delayed (hours) |
| Petechiae | Yes | Rare |
| Ecchymosis type | Multiple small, superficial | Large, deep hematomas |
| Hemarthrosis | Rare | Common (hemophilia) |
| Sex predominance | Either | Usually male (X-linked) |
| Response to pressure | Helps | Less effective for deep bleeds |
Sources: Goldman-Cecil Medicine (22e), p. 1800-1803 - "Evaluation of the Patient with a Possible Bleeding Disorder"
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