Breast Cancer Metastasis to Colon.

Breast cancer metastasis to the colon is exceedingly rare, with only 17 reported cases in the literature thus far. This report describes a 67-year-old female who presented to the Emergency Department for large volume melena in the setting of bilateral metastatic ductal breast carcinoma, left triple negative and right HER2+, and T4N0M0 non-small cell lung cancer. On routine CT abdomen/pelvis imaging, the patient had a 7 cm mass arising from the transverse colon.

Tall Cell Variant of Invasive Papillary Breast Carcinoma.

Tall cell variant of invasive papillary breast carcinoma is exceedingly rare, with only 30 cases reported in the literature. This report describes a case of a 47-year-old woman who presented to the clinic with bilateral breast masses on a screening mammogram. The patient was lost to follow-up, but she presented again after 4 years when the right breast mass significantly grew in size over several months.

Case Report of Renal Cell Carcinoma Metastasis to the Breast.

Metastases from other primary malignancies to the breast are extremely rare, with an incidence of up to 2%. Renal cell carcinoma (RCC) is known to form micrometastases in unusual organs. This report describes a case of a RCC metastasis to the breast that was identified 20 years after nephrectomy.

Case Report of Histiocytoid Invasive Lobular Carcinoma.

The histiocytoid variant of invasive lobular carcinoma (ILC) is a rare subtype of breast cancer that can be challenging to diagnose and aggressive in nature. It is often diagnosed after the disease has metastasized. This report describes a case of a six-centimeter ILC of the histiocytoid subtype.

Thirteen-Centimeter Breast Lymphoma.

Lymphoma of the breast is a rare diagnosis, accounting for less than 0.5% of all breast malignancies. Presentation is usually similar to that of breast cancer, with a painless palpable mass.

CAR T Cell Therapy for Pediatric Brain Tumors.

Chimeric Antigen Receptor (CAR) T cell therapy has recently begun to be used for solid tumors such as glioblastoma multiforme. Many children with pediatric malignant brain tumors develop extensive long-term morbidity of intensive multimodal curative treatment. Others with certain diagnoses and relapsed disease continue to have limited therapies and a dismal prognosis.