41. Rare subtypes include carcinoid tumors, bronchial gland carcinomas and sarcomatoid carcinomas . 42. This is the most common route of metastasis for carcinomas . 43. Other, rarer types include lymphoma and squamous cell carcinoma . 44. Serous carcinomas are thought to develop from endometrial intraepithelial carcinoma. 45. Serous carcinomas are thought to develop from endometrial intraepithelial carcinoma . 46. Type I carcinomas represent 75 90 % of endometrial cancer. 47. Benign fibromas are associated with nevoid basal cell carcinoma syndrome. 48. She died from metastatic carcinoma involving the bones in 1960. 49. Thyroglobulin is not produced by medullary or anaplastic thyroid carcinoma . 50. The differential diagnosis includes the much more common constricting or obstructing carcinoma .