Patient description: The patient is a 16-year-old girl recently diagnosed with myasthenia gravis, class IIa. She complains of diplopia and weakness affecting in her upper extremities. She had a positive anti-AChR antibody test, and her single fiber electromyography (SFEMG) was positive. She is on acetylcholinesterase inhibitor treatment combined with immunosuppressants. But she still has some symptoms. She does not smoke or use illicit drugs. She is not sexually active, and her menses are regular. Her physical exam and lab studies are not remarkable for any other abnormalities. BP: 110/75 Hgb: 11 g/dl WBC: 8000 /mm3 Plt: 300000 /ml Creatinine: 0.5 mg/dl BUN: 10 mg/dl Beta hcg: negative for pregnancy

Clinical trial eligibility criteria: eligible ages (years): 3.0-999.0,  Lymphoma Lymphoma, Non-Hodgkin Immune System Diseases Immunoproliferative Disorders Lymphatic Diseases Lymphoproliferative Disorders Neoplasms Neoplasms by Histologic Type Prior to Cell Procurement Informed consent explained to, understood by and signed by the subject or legal guardian for pediatric subjects; subject and/or legal guradian given a copy of informed consent form for procurement Ages 3 to 17 years of age for pediatric subjects (weight must be ≥10kg), and for adults ages ≥18 years of age Diagnosis of recurrent HL or NHL in subjects who have failed >2 prior treatment regimens. Subjects relapsed after autologous or allogeneic stem cell transplant are eligible for this study. CD30+ disease (result can be pending at the time of cell procurement, but must be confirmed prior to treatment with cells). NOTE: CD30+ disease requires documented CD30 expression by immunohistochemistry based on the institutional hematopathology standard. Karnofsky or Lansky score of >60% (Karnofsky for ≥16 years old and Lansky for <16 years old) Evidence of adequate organ function as defined by Hemoglobin ≥ 8.0 g/dL (transfusion independent for 2 weeks prior to enrollment) Total bilirubin ≤ 1.5 × ULN, unless attributed to Gilbert's Syndrome AST ≤ 3 × ULN Serum creatinine ≤ 1.5 × ULN For subjects <18 years old use the following table for serum creatinine requirements: Maximum Serum Creatinine (mg/dL) Age (years) Male Female 3 to <6 ≤0.8 ≤0.8 6 to <10 ≤1.0 ≤1.0 10 to <13 ≤1.2 ≤1.2 13 to <16 ≤1.5 ≤1.4 ≥16 and <18 ≤1.7 ≤1.4 Negative serum pregnancy test in females within 72 hours prior to procurement or documentation that the subject is post-menopausal or premenarchal. Women of childbearing potential (WOCBP) should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study, and for 6 months after the study is concluded. WOCBP are those who have not been surgically sterilized or have not been free from menses for >1 year. • Postmenopausal status must be confirmed with documentation of absence of menses for >1 year  Prior to Cell Procurement Pregnant or lactating Tumor in a location where enlargement could cause airway obstruction Active infection with HIV, HTLV, HCV (can be pending at the time of cell procurement; only those samples confirming lack of active infection will be used to generate transduced cells) defined as not being well controlled on therapy. Subjects are required to have negative HIV antibody or negative HIV viral load, negative HTLV1 and 2 antibody, negative HCV antibody or viral load. Hepatitis B: Subjects who are positive for Hepatitis B Surface Antigen (can be pending at the time of cell procurement; only those samples confirming lack of active infection will be used to generate transduced cells) are excluded". Subjects who are Hepatitis B Surface Antigen negative but hepatitis B core antibody positive must have their hepatitis B viral load checked. These subjects will be excluded if their viral load is positive at baseline. Subjects who are core antibody positive and viral load negative at baseline will be considered eligible. Prior to Lymphodepletion Informed consent explained to, understood by and signed by the subject or legal guardian for pediatric subjects; subject and/or legal guradian given a copy of informed consent form. CD30+ disease (result can be pending at the time of cell procurement, but must be confirmed prior to lymphodepletion); Note: CD30+ disease requires documented CD30 expression by immunohistochemistry based on the institutional hematopathology standard. Prior to administration of lymphodepletion Absolute neutrophil count (ANC) is > 1.0 × 109/L Platelet count > 75 × 109/L For Grade 4 neutropenia, Grade ≥3 febrile neutropenia, or Grade 4 thrombocytopenia, hold bendamustine until toxicity resolve to Grade ≤2 For WOCBP negative serum pregnancy test within 72 hours prior to lymphodepletion. Imaging results from within 7 days (30 days in subjects with cutaneous T cell lymphoma) prior to lymphodepletion. Subjects who have received bridging chemotherapy must have imaging performed at least 3 weeks after most recent therapy (imaging does not need to be repeated if it is within 7 days prior to lymphodepletion). Karnofsky or Lansky score of >60% (Karnofsky for pediatric subjects ≥16 years old and Lansky for <16 years old). Available autologous transduced activated T cells that meet the Certificate of Analysis (CofA) acceptance criteria. Women of childbearing potential (WOCBP) should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study, and for 6 months after the study is concluded. WOCBP are those who have not been surgically sterilized or have not been free from menses for > 1 year Prior to Lymphodepletion Received any investigational agents or received any tumor vaccines within the previous six weeks prior to cell infusion. Received anti-CD30 antibody-based therapy within the previous 4 weeks prior to cell infusion. Received chemotherapy within the previous 3 weeks prior to lymphodepletion. Subject has rapidly progressive disease, per treating oncologist's discretion. Subject is not a good candidate for CAR T cell therapy, per treating oncologist's discretion. Pregnant or lactating. Tumor in a location where enlargement could cause airway obstruction. Current use of systemic corticosteroids at doses equivalent of ≥10mg prednisone daily or its equivalent; those receiving <10mg daily may be enrolled at discretion of investigator. Inhaled steroids are allowed. For pediatric subjects, physiologic replacement hydrocortisone at doses 6-12 mg/m2/day is allowed. Equivalently dosed alternative steroids are allowed at discretion of investigator, though not to exceed 10mg prednisone per day. Inhaled steroids are allowed. Subjects on strong inhibitors of CYP1A2 (e.g., fluvoxamine, ciprofloxacin) as these may increase plasma concentrations of bendamustine, and decrease plasma concentrations of its metabolites. See http://medicine.iupui.edu/clinpharm/ddis/ for an updated list of strong inhibitors of CYP1A2 Active infection with HIV, HTLV, HCV (can be pending at the time of cell procurement; only those samples confirming lack of active infection will be used to generate transduced cells) defined as not being well controlled on therapy. Subjects are required to have negative HIV antibody or negative HIV viral load, negative HTLV1 and 2 antibody, negative HCV antibody or viral load. Hepatitis B: Subjects who are positive for Hepatitis B Surface Antigen are excluded. Subjects who are Hepatitis B Surface Antigen negative but hepatitis B core Antibody positive must have their hepatitis B viral load checked. These subjects will be excluded if their viral load is positive at baseline. Subjects who are core antibody positive and viral load negative at baseline will be considered eligible if the subject has initiated an anti-HBV prophylaxis regimen prior to lymphodepletion. Prior to Infusion of Cells Evidence of adequate organ function as defined by Total bilirubin ≤1.5 × ULN, unless attributed to Gilbert's Syndrome AST ≤3 × ULN Serum creatinine ≤1.5 × ULN Pulse oximetry of >90% on room air For subjects <18 years old use following table for serum creatinine requirements: Maximum Serum Creatinine (mg/dL) Age (years) Male Female 3 to <6 ≤0.8 ≤0.8 6 to <10 ≤1.0 ≤1.0 10 to <13 ≤1.2 ≤1.2 13 to <16 ≤1.5 ≤1.4 ≥16 and <18 ≤1.7 ≤1.4 Karnofsky or Lansky score of >60% (Karnofsky for ≥16 years old and Lansky for <16 years old) Available autologous transduced activated T cells that meet the Certificate of Analysis (CofA) acceptance criteria. Women of childbearing potential (WOCBP) should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study, and for 6 months after the study is concluded. WOCBP are those who have not been surgically sterilized or have not been free from menses for > 1 year