Female patients are either postmenopausal for at least year, are surgically sterile for at least weeks, or must agree to take appropriate precautions to avoid pregnancy from screening through follow-up if of childbearing potential Negative serum pregnancy test if women of childbearing potential (WOCBP) (non-childbearing is defined as greater than one year postmenopausal or surgically sterilized) Of non-child-bearing potential (surgically sterilized or at least years postmenopausal); or If female of childbearing potential, must have a negative pregnancy test within days of initiating treatment. Childbearing potential is defined by: those who have not been surgically sterilized and/or have had a menstrual period in the past year. Negative serum pregnancy test within weeks of enrollment for women of childbearing potential, defined as those who have not been surgically sterilized or who have not been free of menses for at least year Negative serum pregnancy test within weeks of lymphodepletion chemotherapy for women of childbearing potential, defined as those who have not been surgically sterilized or who have not been free of menses for at least year Females of childbearing potential must have a negative pregnancy test within days prior to randomization. Females who are postmenopausal for at least year (defined as more than months since last menses) or are surgically sterilized do not require this test. Female subjects of childbearing potential must have a negative serum pregnancy test at screening; women of childbearing potential are defined as those who have not been surgically sterilized and have had a menstrual period in the past year Females of childbearing potential must have a negative pregnancy test within days prior to enrollment. Females who are postmenopausal for at least year (defined as more than months since last menses) or are surgically sterilized do not require this test. Female patients of childbearing potential must have a negative urine or serum pregnancy test prior to the first dose of trial treatment; they must also agree to two barrier methods or a barrier method plus a hormonal method, or agree to abstain from heterosexual activity, for the course of the study through days after the last dose of trial treatment; females who have been surgically sterilized or are free from menses for > year (postmenopausal) may enroll Negative serum pregnancy within hours prior to receiving the first dose of study medication (unless surgically sterile or postmenopausal for greater than one year) Negative pregnancy test for women of childbearing potential; subjects of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > year INCLUSION CRITERIA FOR PATIENTS WITH NSCLC OR TNBC (COHORT B): Negative pregnancy test for women of childbearing potential; subjects of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > year INCLUSION CRITERIA FOR TNBC: Negative pregnancy test for women of childbearing potential; subjects of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > year Female subjects of childbearing potential are defined as those women who have not been surgically sterilized or have not been free from menses for > year Negative serum test to rule out pregnancy within weeks prior to registration in females of childbearing potential (non-childbearing potential defined as premenarchal, greater than one year post-menopausal, or surgically sterilized) Females of childbearing potential must have a negative serum ?-Hcg pregnancy test result within days of first study dose. Female patients who are surgically sterilized or who are > years old and have not experienced menses for > years may have ?- Hcg pregnancy test waived. For women of child bearing potential (women who are not free from menses for > years, post hysterectomy/oophorectomy, or surgically sterilized) a negative serum pregnancy test must be documented prior to initial registration Women of child-bearing potential must have a negative serum pregnancy test during Screening and a negative urine pregnancy test within hours prior to first dose of study treatment. Non-childbearing is defined as greater than one year postmenopausal or surgically sterilized. Women of child-bearing potential (intact uterus) MUST have a negative serum or urine human chorionic gonadotropin (HCG) test within hours prior to receiving the first dose of study medication. Patients of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > year. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required. Female subjects must be of non-childbearing potential; women of childbearing potential are those who have not been surgically sterilized or have not been free from menses for >= year Female patients of childbearing potential must have a negative urine or serum pregnancy within hours before receiving the first dose of study medication; if the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required\r\n* Note: women of child-bearing potential must agree to use methods of birth control, or be surgically sterile, or abstain from heterosexual activity beginning with the screening visit and for the duration of study participation, through days beyond last dose of MK- administration; patients of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > year\r\n* Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately Females of childbearing potential must have a negative pregnancy test within days prior to randomization. Females who are postmenopausal for at least year (defined as more than months since last menses) or are surgically sterilized do not require this test. Female patients of childbearing potential must have a negative urine or serum pregnancy within hours before receiving the first dose of study medication; if the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required\r\n* Note: women of child-bearing potential must agree to use methods of birth control, or be surgically sterile, or abstain from heterosexual activity beginning with the screening visit and for the duration of study participation, through days beyond last dose of MK- administration; patients of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > year; should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately Negative serum pregnancy test within days prior to study treatment if a woman has child-bearing potential. Subjects of child bearing potential are those who have not been surgically sterilized or have not been free from menses for > year. Women not of childbearing potential must be postmenopausal, permanently sterilized, or otherwise incapable of pregnancy Females or female partners not of childbearing potential must have been surgically sterilized or postmenopausal (as defined above in inclusion criterion #). Sterilized males must be at least year post vasectomy Women of childbearing potential (not surgically sterilized or at least years postmenopausal) must have a negative serum or urine pregnancy test performed within days prior to the start of treatment Subjects who are fertile agree to use an effective barrier method of birth control (ie, latex condom, diaphragm, cervical cap, etc) to avoid pregnancy. Female subjects need a negative serum or urine pregnancy test within days of study enrollment (applies only if subject is of childbearing potential. Non?childbearing is defined as ? year postmenopausal or surgically sterilized). Patients must be postmenopausal, free from menses for > year, surgically sterilized, or willing to use adequate contraception to prevent pregnancy or must agree to abstain from activities that could result in pregnancy throughout the study, starting with enrollment through days after the last dose of study treatment. Women of childbearing potential must have a negative pregnancy test and agree to practice a medically acceptable contraception regimen for the study duration. Women who are postmenopausal for at least year (> months since last menses) or are surgically sterilized do not require this test Female subject of childbearing potential should have a negative urine or serum pregnancy within hours prior to receiving the first dose of study medication. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required; female subjects of childbearing potential should be willing to use methods of birth control or be surgically sterile, or abstain from sexual activity for the course of the study through days after the last dose of study medication; subjects of child bearing potential are those who have not been surgically sterilized or have not been free from menses for > year; NOTE: abstinence is acceptable if this is the established and preferred contraception for the subject Women of child-bearing potential (intact uterus) should have a negative urine or serum pregnancy within hours prior to receiving the first dose of study medication; subjects of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > year; if the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required Female subjects who are surgically sterilized or who have not experienced menses for at least two years are not required to have a pregnancy test If the patients is of child bearing potential, the patient has a negative pregnancy test within hours prior to administration of radiopharmaceutical, has been surgically sterilized, or has been postmenopausal for at least year Females of childbearing potential are to agree to practice a medically acceptable contraceptive regimen (including a barrier method) from study treatment initiation until at least days after the last administration of Folotyn or leucovorin, whichever is last, and are to have a negative urine beta human chorionic gonadotropin (?-HCG) pregnancy test within days prior to the first day of study treatment. Females who are postmenopausal for at least year (defined as > months since last menses) or are surgically sterilized do not require this test If of childbearing potential, the patient has a negative pregnancy test within hours before administration of Lymphoseek, has been surgically sterilized, or has been postmenopausal for at least year If of childbearing potential, the subject has a negative pregnancy test within hours before administration of Lymphoseek, has been surgically sterilized, or has been postmenopausal for at least year