TYpes

 focal C-cell hyperplasia
 diffuse C-cell hyperplasia
 nodular C-cell hyperplasia

Differential diagnosis

 intraglandular spread of thyroid medullary carcinoma
 solid cell nests
 palapation thyroiditis
 microinvasive medullary carcinoma

See also

 thyroid medullary carcinoma

References

 Kaserer K, Scheuba C, Neuhold N, Weinhausel A, Vierhapper H, Haas OA, Niederle B. C-cell hyperplasia and medullary thyroid carcinoma in patients routinely screened for serum calcitonin. Am J Surg Pathol. 1998 Jun;22(6):722-8. PMID: #9630179#

 DeLellis RA. Multiple endocrine neoplasia syndromes revisited. Clinical, morphologic, and molecular features. Lab Invest. 1995 May;72(5):494-505. PMID: #7745945#

 McDermott MB, Swanson PE, Wick MR. Immunostains for collagen type IV discriminate between C-cell hyperplasia and microscopic medullary carcinoma in multiple endocrine neoplasia, type 2a. Hum Pathol. 1995 Dec;26(12):1308-12. PMID: #8522302#

 Biddinger PW, Brennan MF, Rosen PP. Symptomatic C-cell hyperplasia associated with chronic lymphocytic thyroiditis. Am J Surg Pathol. 1991 Jun;15(6):599-604. PMID: #1674409#

 Wolfe HJ, Delellis RA. Familial medullary thyroid carcinoma and C cell hyperplasia. Clin Endocrinol Metab. 1981 Jul;10(2):351-65. PMID: #7285384#