Morphology
Regarding morphology, goitres may be classified either as the growth pattern or as the size of the growth:
- Growth pattern
- Uninodular (struma uninodosa): can be either inactive or a toxic nodule
- Multinodular (struma nodosa): can likewise be inactive or toxic, the latter called toxic multinodular goitre
- Diffuse (struma diffuse): the whole thyroid appearing to be enlarged.
- Size
- Class I (palpation struma): in normal posture of the head, it cannot be seen; it is only found by palpation.
- Class II: the struma is palpative and can be easily seen.
- Class III: the struma is very large and is retrosternal; pressure results in compression marks.
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Struma nodosa (Class II)
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Struma with autonomous adenoma
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Struma Class III
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