Causes Flashcards

(26 cards)

1
Q

Causes

Drugs causing flushing

  • -
A
  • isosorbide mononitrate
  • sildenafil
  • nicotinic acid
  • verapamil
  • amlodipine
  • nicorandil
  • tamoxifen
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2
Q

Causes

Erythema nodosum

A

Infection:

  • Streptococci, (most common)
  • Tb,
  • Brucellosis
  • coccidioidomycosis
  • Yersinia enterocolitica

Systemic disease:

  • Sarcoidosis,
  • Inflammatory bowel disease,
  • Behcet’s

Malignancy/lymphoma

Drugs:

  • Penicillins,
  • Sulphonamides,
  • Combined oral contraceptive pill

Pregnancy

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3
Q

Causes

Erythema multiforme

A
  • Herpes simplex virus (the most common cause), orf*
  • Idiopathic
  • Mycoplasma, streptococcus
  • Penicillin, sulphonamides, carbamazepine, allopurinol, NSAIDS, oral contraceptive pill, nevirapine
  • Connective tissue disease e.g. SLE
  • Sarcoidosis
  • Malignancy

Infections

  • Mycoplasma pneumonia
  • Herpes simplex virus
  • Orf
  • TB

Drugs

  • Penicillins
  • Sulphonamides
  • Barbiturates
  • NSAID

Miscellaneous

  • Connective tissue diseases
  • Vasculitides
  • Internal malignancy
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4
Q

Causes

Pyoderma gangrenosum

A
  • Idiopathic in 50%
  • Inflammatory bowel disease: ulcerative colitis, crohn’s
  • Primary biliary cirrhosis
  • Rheumatoid arthritis, sle
  • Myeloproliferative disorders
  • Lymphoma, myeloid leukaemias
  • Monoclonal gammopathy (iga)
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5
Q

Causes

Acanthosis nigricans

A
  • GIT cancer (Gastric adenocarcinoma)
  • Diabetes mellitus
  • Obesity
  • Polycystic ovarian syndrome
  • Acromegaly
  • Cushing’s disease
  • Hypothyroidism
  • Familial
  • Prader-Willi syndrome
  • Drugs:
    • Oral contraceptive pill,
    • Nicotinic acid
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6
Q

Causes

Urticaria

A
  • aspirin
  • penicillins
  • NSAIDs
  • opiates
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7
Q

Causes

The differential diagnosis of shin lesions

A
  • Erythema nodosum
  • Pretibial myxoedema
  • Pyoderma gangrenosum
  • Necrobiosis lipoidica diabeticorum
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8
Q

Causes

Photosensitivity

A
  • SLE
  • Porphyria Cutanea Tarda
  • Erythropoietic Porphyria
  • Pemphigoid
  • Pemphigus
  • Drugs
    • Thiazides
    • NSAIDS
    • Sulphonamides
    • Tetracyclines
    • Ciprofloxacin
    • Antihistamines
    • OCPs
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9
Q

Causes

Causes of drug-induced photosensitivity

A
  • thiazides
  • tetracyclines, sulphonamides, ciprofloxacin
  • amiodarone
  • NSAIDs e.g. piroxicam
  • psoralens
  • sulphonylureas
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10
Q

Causes

Café-au-lait spots

A
  • Neurofibromatosis type I & II
  • Tuberous sclerosis
  • Fanconi anaemia
  • Mccune-Albright syndrome
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11
Q

Causes

Steven-Johnson syndrome

A
  • sulphonamides
  • carbamazepine
  • lamotrigine
  • Allopurinol
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12
Q

Causes

Causes of orogenital ulcers

A

Causes of orogenital ulcers

  • Behçet’s syndrome
  • Crohn’s disease
  • Herpes simplex virus
  • Ulcerative colitis
  • Reiter’s syndrome
  • Lichen planus
  • Syphilis
  • Gonococcal infection
  • HIV
  • Pemphigus pemphigoid
  • Stevens–Johnson syndrome
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13
Q

Causes

Macroglossia (big tongue)

A

Macroglossia (big tongue)

  • hypothyroidism
  • acromegaly
  • amyloidosis
  • Duchenne muscular dystrophy
  • mucopolysaccharidosis (e.g. Hurler syndrome)
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14
Q

Causes

Causes of orogenital ulcers and venous

thromboses

A

Causes of orogenital ulcers and venous

thromboses

  • Behçet’s syndrome
  • Ulcerative colitis
  • Crohn’s disease
  • Reiter’s syndrome
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15
Q

Causes

Causes of white lesions in the oral mucosa

A

Causes of white lesions in the oral mucosa

  • Lichen planus
  • Leukoplakia
  • Chronic candidiasis
  • Chemical burns
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16
Q

Causes

Strawberry tongue

A

Strawberry tongue

  • Kawasaki disease
  • Scarlet fever
17
Q

Causes

Gingival hyperplasia

A

Gingival hyperplasia

Drug causes of gingival hyperplasia

  • phenytoin
  • ciclosporin
  • calcium channel blockers (especially nifedipine)

Other causes of gingival hyperplasia include

  • acute myeloid leukaemia (myelomonocytic and monocytic types)
18
Q

Causes

Dry mouth (drugs)

A

Dry mouth

  • isotretinoin
  • levodopa
  • antipsychotics
  • tricyclic antidepressants
19
Q

Causes

Mucositis (drugs)

A

Mucositis

  • methotrexate
20
Q

Causes

Ototoxicity (drugs)

A

Ototoxicity

  • loop diuretics
  • aminoglycosides
21
Q

Causes

Onycholysis (drugs)

A

Onycholysis

  • Idiopathic
  • Trauma e.g. Excessive manicuring
  • Infection: especially fungal
  • Skin disease: psoriasis, dermatitis
  • Impaired peripheral circulation e.g. Raynaud’s
  • Systemic disease: hyper- and hypothyroidism
22
Q

Causes

Clubbing

Respiratory causes of clubbing

Unilateral clubbing

Unidigital clubbing

Only in upper limb

Clubbing of toes

Cardiac causes of clubbing

A

Clubbing

almost always seen with

  • Advanced IPF
  • Asbestosis

commonly seen with

  • Cystic fibrosis
  • Bronchiectasis
  • Lung cancer

almost never seen with:

  • Emphysema
  • Sarcoidosis

Respiratory causes of clubbing

  • Abscess (lung) and Asbestosis
  • Bronchiectasis
  • Cystic fibrosis
  • Dirty tumours (bronchogenic carcinoma, mesothelioma)
  • Empyema
  • Fibrosing alveolitis (interstitial pulmonary fibrosis).

Unilateral clubbing

  • Pancoast tumor
  • Subclavian & innominate artery aneurysm

Unidigital clubbing

  • Traumatic
  • Gout
  • sarcoidosis

Only in upper limb

  • In heroin addicts due to chronic obstructive phlebitis unilateral clubbing is seen,
  • also in aneurysm of major extremity arteries, with infected arterial graft ,arteriovenous fistulas of brachial vessels.

Clubbing of toes

  • infected abdominal aortic aneurysm
  • patent ductus arteriosus

Cardiac causes of clubbing

  • cyanotic congenital heart disease (Fallot’s, TGA)
  • bacterial endocarditis
  • atrial myxoma

Other causes:

  • Crohn’s, to a lesser extent UC
  • cirrhosis, primary biliary cirrhosis
  • Graves’ disease (thyroid acropachy)
  • rare: Whipple’s disease
23
Q

Causes

Causes of pharyngitis and rash

A

Causes of pharyngitis and rash

  • scarlet fever caused by GABHS (diffuse erythema with fine, sandpaper-like papules),
  • acute HIV (maculopapular),
  • Arcanobacterium haemolyticum (diffuse erythema),
  • Mycoplasma pneumoniae (erythema multiforme),
  • Epstein Barr virus (maculopapular in 30% and up to 90% if given ampicillin), and
  • coxsackieviruses (vesicular).
24
Q

Causes

Organisms causing necrotizing fasciitis

A

Organisms causing necrotizing fasciitis

  • group A or B strep,
  • Vibrio vulnificus,
  • S. aureus, and
  • Clostridium species.
25
Causes Causes of purpura Palpable Non-palpable
Causes of purpura Palpable * Vasculitis (leukocytoclastic vasculitis) * Drugs (antibiotics) * Infections (Hepatitis C) * Autoimmune connective tissue diseases (RA, lupus, Sjogren syndrome) * HSP * PAN * Embolic type * Meningococcemia * Disseminated gonococcal infection * RMSF * Erythema gangrenosum Non-palpable * Steroid Purpura * ITP * Vascular fragility (Amyloidosis Ehlers-Danlos Syndrome) * Thrombi * DIC * TTP * Warfarin reaction * Cryoglobulinemia * Thrombocytosis * Fat emboli
26
Causes Tinnitus
Tinnitus * Pulse synchronous tinnitus with idiopathic intracranial hypertension * Intermittent tinnitus with Ménière's * Aspirin overdose * High noise levels * Hearing loss