Thyroid, Parathyroid And Adrenal Glands Flashcards
(187 cards)
What is Berry’s ligament?
Pre-tracheal fascia condensation (Attaches thyroid gland to trachea)
RLN injured at this site during thyroid surgery
Methods for Thyroid examination
- Pizzillo’s method
- Lahey’s method
- Crile’s method
What is Pizzillo’s method?
Patient’s hand on the occiput and leans
What is Lahey’s method used for?
To feel margin of gland
What is Crile’s method?
To palpate nodules
1st investigation in Thyroid Disorders
TFT:
T3,T4, TSH
Anti-thyroid antibodies
If TSH is normal or increased, then investigation
USG Neck -> FNAC (IOC): Cannot differentiate b/w follicular adenoma v/s carcinoma
If TSH is decreased, then investigation
Thyroid scan
Features of Malignant thyroid nodule
- Hypoechoic
- Border irregularity
- Microcalcifications
- Inc in intranodular vascularity
- Gross: Abnormal cervical LN (Round shape + Loss of fatty hilum)
TIRADS score where FNAC is needed
TR3, TR4, TR5 lesions
Thyroid FNAC Classification
AKA Royal College of Pathologist classification
Similar to Bethesda classification
Thy 1 FNAC report
Inference: Non diagnostic
Mx: Repeat FNAC under USG guidance
Thy 1c FNAC report
Inference: Non diagnostic cystic
Mx: Repeat FNAC under USG guidance
Thy 2 FNAC report
Inference: Non neoplastic (Benign)
Mx: Follow up
Thy 3 FNAC report
Inference: Follicular
Mx: Hemithyroidectomy
Thy 4 FNAC report
Inference: Suspicious of malignancy
Mx: Surgery
Thy 5 FNAC report
Inference: Malignant
Mx: Surgery
Criteria for Thyroid specimen
At least 6 groups of follicular cells -> Each group composed adequacy of at least 10 cells on a single slide
Isotopes used in Thyroid scan
Tc99/I123
Indications of Thyroid scan
- Features of hyperthyroidism and dec in TSH
- Ectopic or aberrant thyroid tissue
Thyroid scan in Cold nodule
Non-functioning
Inc malignancy risk (20%)
Thyroid scan in Hot nodule
Hyper functioning
Malignancy risk: 4%
Thyroid scan in Toxic multinodular goitre
AKA Plummer’s disease
Multiple hot nodules
Thyroid scan in Graves’ disease
Diffuse inc uptake