Neck Flashcards
Thin sonoluscent bands anterior surface of thyroid
Strap muscles- sternohyoid, sternothyoid
Location so sternoceidomastoid muscle
Anteriolaterally
Posterior to thyroid , wedge shaped , sonoluscent, adjacent to cervical vertebrae
Longus colli muscle
Vague hypoechoic area btwn Longus colli and thyroid
Minor neurovascular bundle
Posterior to thyroid , typically not visualized
Parathyroid
Midline with reverberation artifact
Trachea
Transversely a target sign
Esophagus
TSH:
Produced by-
Normal range-
Pituitary
0.3-3.0
Hypothyroidism lab :
TSH- increased or decreased
Increased
Serum thyroid hormones -
T4- aka
T3- aka
T4- thyroxine
T3- triiodothyronine
Pituitary is regulated by________
Hypothalamus
Hypothyroid lab values
TSH increased , t4/t3 decreased
Hyperthyroid lab values
Decease TSH , increase t4/t3
Most common benign nodule
Thyroid adenoma
Thyroid adenoma sonographic presentation
Iso or hyperechoic
Cystic
Solitary , well defined mass, usually hypoechoic , may have halo or echogenic rim
Follicular adenoma
Normal variant extending superior to isthmus
Pyramidal lobe
Most common thyroid cancer 75-90%
Papillary carcinoma
Papillary carcinoma sonographic presentation-
Route of spread-
Hypoechoic , possible calcification
Cervical lymph nodes
Follicular carcinoma- 5-15%
Sonographic presentation-
Differential -
Major route of spread-
Encapsulated
Benign follicular adenoma- biopsy to confirm
Blood stream (distal mets to lung & bone)
Medullary carcinoma 5%
Secretes - ________ ( useful serum marker)
Associated with_________
Calcitonin
MEN- multiple endocrine neoplasia
Benign vs malignant:
Cystic
Benign
Benign vs. malignant
Hypoechoic
Possible malignant
Benign vs. malignant
Hyperechoic
More likely benign
Benign vs. malignant
Sharp and well defined_______
Irregular and poorly defined_______
Benign
Malignant
Benign vs. malignant
Peripheral or eggshell______
Fine and punctate_______ ( common in _______)
Benign
Malignant, papillary
Benign vs. malignant : peripheral sonoluscent halo
Thin and complete______
Thick and incomplete_______
Benign
Malignant