Tumor to Tumor Metastasis

Abstract

Tumor-to-tumor metastases are uncommon. The most frequent donor tumor is lung cancer, while renal cell carcinoma (RCC) is by far the most common recipient. In this report, a carcinoma of the uterine cervix metastasizing to an RCC and a urothelial carcinoma of the urinary bladder metastasizing to a solitary fibrous tumor of the pleura are described. No similar cases have been found in the accessible literature. These cases are discussed and the findings are correlated with the data of the literature.

Papillary Carcinoma of Thyroid Metastatic to AdenocarcinomaIn Situof Lung: Report of an Unusual Case

“…The most frequent recipient tumor is renal cell carcinoma (RCC), followed by meningioma, and thyroid tumor 5. Here we report an unusual occurrence of papillary thyroid carcinoma (PTC) metastasizing to nonmucinous adenocarcinoma in situ (AIS) of the lung.…”

Tumor-to-Tumor Metastasis to Chromophobe Renal Cell Carcinoma: A First Report

“…Although the coexistence of 2 or more primary neoplasms in the same patient is sometimes observed, tumor-to-tumor metastasis is a rare phenomenon [1–4]. Documentation of tumor-to-tumor metastasis must meet certain criteria.…”

“…Renal clear cell carcinoma is the most common recipient tumor of metastasis while chromophobe cell carcinoma has not been reported to be a recipient [3, 4]. We present a case of colorectal carcinoma metastatic to chromophobe renal cell carcinoma and a brief review of the relevant literature.…”

Metastatic adenocarcinoma within a functioning adrenal adenoma: a case report

“…The phenomenon generally involves metastasis from a donor (malignant) tumor to either a benign or malignant recipient tumor. Lung cancer is the most common primary tumor involved in up to 50% of the reported cases [7]. Other donor tumors which have been reported include breast, gastrointestinal, prostate and thyroid malignancies.…”