28 December 2022
: Case report 
A 54-Year-Old Woman with Papillary Thyroid Carcinoma Associated with Secondary Amyloid Goiter and Thyroid Lipomatosis
Challenging differential diagnosis, Rare disease
Eugénia Maria Morado da Silva1EF*, Rute Alexandra da Costa Ferreira
1E, Aluixa Rosmar Colmenares Lozada 2DE, João Manuel Sequeira Duarte 1EF
DOI: 10.12659/AJCR.938156
Am J Case Rep 2022; 23:e938156
Figure 4. A photomicrograph of the light microscopy and polarized light microscopy of the thyroid gland showing amyloid (A) Light microscopy of the Congo red histochemical staining shows areas of amyloid (blue arrows). Congo red. Objective magnification ×100. (B) Polarized light microscopy of the Congo red staining shows apple-green birefringence in polarized light (red arrows), which is typical for amyloid. Objective magnification ×100.