9. Soft tissue (MSK) Flashcards
What structures are affected in soft tissue tumours
Non-epithelial extra-skeletal structures
Soft tissue tumours originate from what?
Mesoderm
What is the most common soft tissue tumour?
Benign tumour
What is the malignant soft tissue tumour called?
Sarcoma
Neurofibromatosis type 1 is a type of what soft tissue?
Neurofibroma
Gardner syndrome has what type of soft tissue tumour?
Fibromatosis
Carney syndrome has what type of soft tissue tumour?
Myxoma
Turner syndrome has what type of soft tissue tumour?
Cystic hygroma
A benign cartilage tumour
Chondroma
Osteosarcomas are commonly found where?
Knee
What syndrome is associated with systemic sclerosis
CREST
What is associated with polymyalgia Rheumatica
Giant cell arteritis
Myopathy definition
Muscle disease not affected by neuromuscular junction // innervation
Myositis definition
Inflammation of muscle fibres + overlying skin
Malignant hyperthermia presents itself especially during what?
Px under general anaesthetics
Dark brown urine is indicative of what?
what is the medical term?
Destruction of skeletal muscle
Myoglobinuria
Most common type of joint disease
Osteoarthritis
What type of structure is formed in osteoarthritis?
Bony spurs
give 2 examples of secondary osteoarthritis causes
Basketball players
Baseball players
What type of cysts form in osteoarthritis
Subchondral cysts
What type of cell is found in osteoarthritis?
What does it do
Chondrocytes => IL-1 => Matrix breakdown
Prostaglandins found in osteoarthritis do what?
Prevent matrix synthesis
What type of synovitis is produced in Rheumatoid arthritis?
Non suppurative proliferative synovitis
Synoviocyte hyperplasia =>
Pannus
** found in RA
What does the Pannus erode into in RA?
Subchondral bone
What is ankylosis?
What disease is this found in?
Fusion of bones ==> RA
What viruses are associated with RA?
EBV /// Borrelia (Lyme disease)
What is a good diagnosis of RA?
Detection of neutrophils in synovial fluid
Tophi is the formation of what?
Crystallization of urates
Hyperuricemia is the end product of what?
Purine Metabolism
Secondary Osteoporosis is caused by what?
Endocrine disorders
=> Hyper PTH // DDM
Paget’s disease is caused by what (virally)?
Paramyxovirus
What hallmark is found in Paget’s disease?
Mosaic pattern of cells
Hyperparathyroidism leads to what (calcium)
Hypercalcaemia
***PTH released in low Ca
Subacute dermatitis has what type of exudate?
Reduced amount
Acute dermatitis has what type of exudate?
Weeping excudate
Chronic dermatitis has what type of hyperplasia present?
What does the skin feel like
Epidermal Hyperplasia
Leathery
Atopic Eczema is what type of hypersens?
Type 1
Contact allergic dermatitis is what type of hypersens?
Type 4
What genes are involved in psoriaasis?
Chromosomes?
PSORS genes
6p2
Lichen Planus is what type of hypersens?
Type 4
Lupus Erythematosus affects what?
Connective tissue
Discoid Lupus Vs Systemic Lupus
Discoid ==> Skin only
Systemic ==> Visceral w/skin
Dermatomyositis has what type of rash present
Heliotropic rash
Pemphigus has a loss of cohesion between what?
What type of blister is formed?
No cohesion between keratinocytes
Intraepidermal blister
What type of blister is formed in Bullous Pemphigoid
Sub epidermal blister
What type of blister ruptures easily
Intraepidermal blister => Rupture easily
Sub-epidermal blister => Hard to rupture
Dermatitis Herpetiformis is associated with what disease?
Coeliac disease
What is the most common malignant skin tumour?
Basal cell carcinoma
A rodent ulcer is associated with what carcinoma
Basal cell carcinoma
Squamous cell carcinoma causes are associated with what? (2)
Sun exposed
Exposure to hydrocarbons
Melanocytes originate from what? (embro)
Neural crest
Are Naevi benign
Yes
Benign collection of melanocytes
What type of mutations are present in melanomas
BRAF
Gardasil = >
HPV vaccine
what type of HPV causes cancers
16 / 18
Pilonidal cysts are associated with what
Ingrowing of hair
What part of the skin layers are affected in cellulitis
Dermis + Subcutaenous fat => Lymphatics
Type 1 Necrotising fasciitis is associated with what type of bac?
Gram Negative
Type 2 Necrotising fasciitis is associated with what type of bac?
Group A strep
Type 3 Necrotising fasciitis is associated with what type of bac?
Vibrio Vulnificus
Crepitus is associated with what type of gangrene?
Gas gangrene
Spirochete =>
What is it associated with (disease)
Spiral shaped bacteria
Syphilis
primary syphilis key hallmark?
Chancre
=> Painless ulcer at point of contact
papilloma =>
Benign epithelial tumour
Nasal Polyps are triggered by what?
Allergic irritation or infection
Samter’s triad
What is it associated with (what condition)
Nasal polyps // Asthma // Aspirin Intolerance
Nasal Polyps
In nasal polyps, what is the predominant cell type in an infectious cause?
And in an allergic type?
Neutrophils => Infection
Eosinophils => Allergic
Wickham striae is generally found in what condition?
Oral lichen planus
Epiglottis cause
Haemophillis influenza type B
Vocal cord poylps // nodules can be caused by what trauma?
What nodes form?
Phonatory trauma
Singers nodes
Sialadenitis =>
Infection of the salivary gland
Bacterial sialandenitis occurs in people with what?
Xerostomia (Dry mouth)
Viral sialadenitis occurs in people with what?
mumps
Ranula ->
Where does it generally affect (structure / part)
Mucous retention cyst
Floor of mouth
Majority of salivary neoplasms are what?
What gland does it affect
Pleomorphic adenoma
Parotid gland
Warthin tumour
Malignant or benign?
Benign
Majority of malignant neoplasms in oral cavity are what?
Oral squamous cell carcinoma
Where do oral squamous cell carcinomas affect the most?
Where do they least affect?
Lower lip => Most common
Uvula => Least common
What side is genearlly affected in laryngeal cancer?
Unilateral in larynx
Common symptom of laryngeal cancer?
hoarseness of voice
salmon pink scaly plaque = ?
Psoriasis
keratin layer + nodule could indicate what kinda of carcinoma?
Squamous Cell Carcinoma
central depression, pearly appearance, telangiectasia are characteristic of what?
Basal cell carcinoma
laryngeal dysplasia 2 predisposing factors =>
tobacco
alcohol
how much of the population is affected by psoriasis?
1-25
commonest malignant tumour, which only very rarely metastasizes?
Basal cell carcinoma
type of testing is commonly used in diagnosing soft tissue tumours?
Cytogenetic
most common salivary gland tumour location
parotid
does prostate gland metastasis spread to bone?
Y
RB mutation is associated with what
retinoblastoma