DANIL HAMMOUDI.MD

SINOE MEDICAL ASSOCIATION

 

 

 

KC CHEMOTHERAPY AND IMMUNOLOGY

FOR THE USMLE

 

-32 YEAR OLD KC PATIENT

·         2 PACKS OF CIGARETTES/DAY-->10 YEARS

·         DECREASE PULMONARY FUNCTION TEST

·         X RAYS: PREEXISTING PULMONARY DISEASE

 

***PRESCRIPTION POSSIBLE:                                               ***EXCEPT:

  • VINBLASTINE [VELBAN]                                                       BLEOMYCIN [BLENOXANE]
  • DOXORUBINCIN [ADRIAMYCIN]
  • MITHRAMYCIN [MITRACIN]
  • CIS-DIAMMINEDICHLOPLATINIUM [PLATINOL]

 

 

 

BLEOMYCIN : ADVERSE EFFECTS :   +++PNEUMONITIS

                                                              +++PULMONARY FIBROSIS

 

                        MECHANISM OF ACTION:         +++THE PLANAR END OF THE BLEOMYCIN MOLECULE INTERCALES WITH DNA.

                                                                        +++FREE RADICAL O2 CLEAVES DNA ACTION AT PURINE- GUANOSINE-CYTOSINE-PYRIMIDINE SEQUENCES.

                                                                        +++CELLS IN G0 AND G2 PHASES ARE MOST SENSITIVE.

 

                        PHARMACOCINETICS: 1/2 LIFE 1 H

                                                            ELIMINATION: URINE 24H

 

                        ACTION:           -SKIN

                                                -LUNG

                                                BY BLEOMYCIN HYDROLASE

 

                        ASSOCIATION: CISPLATIN  - VINBLASTINE   ==>TESTICULAR CARCINOMA

 

KC:      

1.       -TESTICULAR CARCINOMA

2.       -HODGKIN'S-NON HODGKIN'S

3.       -SQUAMOUS CELLS CARCINOMA

4.       -HEAD NECK-CERVIX-SKIN

 

> 400 UNIT [4X1.7 mg]===> PULMONARY TOXICITY

BLEOMYCIN DOES NOT PRODUCE SIGNIFICANT BONE MARROW TOXICITY.



KC CHEMOTHERAPY NATURAL PRODUCT:

 

1/ ATB :           

1.       ***DACTINOMYCIN [ACTINOMYCIN D]

2.       ***ANTHRACYCLINES

3.       ***BLEOMYCIN

4.       ***MYTOMYCIN [MITOMYCIN C]

 

2/ VINCA ALKALOIDS

 

3/BIOLOGIC RESPONSE MODIFIERS:  ***INTERLEUKINE-2 [IL-2]

                                                              ***INTERFERONS [ a, b, g]

 

4/ ENZYMES :                       ***L - ASPARAGINASE

 

5/ EPIPODOPHYLLOTOXINS [ ETOPOSIDE AND TENIPOSIDE]

 

 

            ***TAMOXIFEN

            ***ANDROGENS    AND    ANTIANDROGENS

                        |                       |

            FLUOXYMESTERONE   FLUTAMIDE

            DROMOSTANOLONE

            TESTOSTERONE

 

            ***ADRENAL CORTICOSTEROIDS  :+++PREDNISONE +++PROGESTINS

 

 

 

MISCELLANEOUS AGENTS :  ***HYDROXYUREA

***PROCARBAZINE

                        ***MITOTANE [OP'-DDD]

***CISPLATIN

                        ***INTERLEUKIN 2 [IL-2]

 

ANTIMETABOLITES:    

1.       ***METHOTREXATE

2.       ***PURINE ANALOGS:        +++6-MERCAPTOPURINE       +++6- THIOGUANINE                  +++PENTOSTATINE

3.       ***PYRIMIDINE ANALOG:   +++5 FLUOROURACIL             +++CYTARABINE

 

ALKYLATING AGENTS:     

1.       ***NITROGEN MUSTARDS

2.       ***NITROSOUREAS

3.       ***ALKYL SULFONATES

4.       ***TRIAZENES

1/ nitrogens mustards:                ***MECHLORETHAMINE

                                                   ***CYCLOPHOSPHAMIDE

                                                   ***MELPHALAN

                                                   ***CHLORAMBUCIL

 

2/ NITROSOUREAS                     ***CARMUSTINE

                                                  ***LOMUSTINE

 

3/ALKYL SULFONATES            ***BISULFAN

 

4/TRIAZENES                            ***DACARBAZINE

                 S PHASE=DNA SYNTHESIS

 

 

 

 

THE FOLLOWING DRUGS ARE COMPONENTS OF THE MOPP CANCER CHEMOTHERAPY REGIMEN:

 

***MECHLORETHAMINE

            ***VINCRISTINE

            ***PREDNISONE

            ***PROCARBAZINE

 

CYCLOPHOSPHAMIDE CAN BE USED TO TREAT ALL OF THE FOLLOWING NEOPLASTIC DISORDERS:                                             

                                                ***HODGKIN'S DISEASE

            ***BURKITT'S LYMPHOMA

            ***OVARIAN CARCINOMA

            ***BREAST CARCINOMA

 

PROLIFERATION INDEPENDENT AGENTS INCLUDE ALL THE FOLLOWING:

                                                ***CARMUSTINE

                                                ***CYCLOPHOSPHAMIDE

                                                ***MECHLORETHAMINE

                                                ***MELPHALAN

 

 

ALL THE FOLLOWING ADVERSE EFFECTS ARE COMMONLY ASSOCIATED WITH KC CHEMOTHERAPY:                                            

                                                ***ALOPECIA

                                                ***TERATOGENESIS

            ***MYELOSUPPRESSION

            ***NAUSEA

 

ALL THE FOLLOWING AGENTS HAVE BEEN USED FOR KC CHEMOTHERAPY:

            ***ALKYLATING AGENTS

            ***ANTIMETABOLITES

            ***PLANT ALKALOID

            ***HORMONAL AGENT

 

CHARACTERISTICS OF METHOTREXATE INCLUDE ALL OF THE FOLLOWING:

            ***IT CAN BE USED IN THE TRT OF PSORIASIS

            ***IT IS ELIMINATED BY THE KIDNEY

            ***IT IS A SELF LIMITING S-PHASE SPECIFIC DRUG

            ***IT COMPETITIVELY INHIBITS DIHYDROFOLATE REDUCTASE.

·         METHOTREXATE :  ***ANTIMETABOLITES CANCER CHEMOTHERAPY

·         THERE IS 3 MAJOR CLASSES OF ANTIMETABOLITES : +++FOLIC ACID ANALOGS

                                                                                                +++PYRIMIDINE

                                                                                                +++PURINE RELATED AND RELATEd INHIBITOR

 

 

TRUE STATEMENT REGARDING ALKYLATING AGENTS INCLUDE ALL OF THE FOLLOWING:

            ***THEY ARE PHASE NON SPECIFIC

            ***THEY KILL RAPIDLY PROLIFERATING CELLS

            ***ACQUIRED RESISTANCE CAN OCCUR

            ***THEY KILL NON PROLIFERATING CELLS

 

ALKYLATING AGENTS:                        - PHASE NON SPECIFIC

                                                -KILLING RAPIDLY PROLIFERATING CELLS

                                                -KILL NON PROLIFERATING CELLS==> ALKYLATION OF RNA

                                                                                                            DNA

                                                                                                ESSENTIAL PROTEINS

                                                -SOME NITROGEN MUSTARD ARE PROLIFERATION -INDEPENDENT

                                                -ALKYLATION OF DNA IS RESPONSIBLE FOR THE CYTOTOXIC ANTITUMOR ACTIVITY.

                                   

 

 

++THE 7 NITROGEN AND GO2 OF GUANINE ARE THE MOST FAVORED SITES OF

DNA FOR ALKYLATION : RESULT : = CROSS LINKING

            BIFUNCTIONAL ALKYLATING AGENTS   } ==> INHIBITS DNA    REPLICATION =MISPAIRING OF BASES: ALKYLATED GUANINE FORMS BASE PAIRS WITH THYMINE===> DEFECTIVE PROTEIN. =DEPURINATION OF DNA: CLEAVAGE OF IMIDAZOLE RING

 

 

 

 

MAJOR CLASS:            ***NITROGENS MUSTARD

                                    ***NITROUREAS

                                    ***ALKYL SULFONATES

                                    ***TRIAZENES

 

                                    ***APLASIA OF THE BONE MARROW

                                    ***ALOPECIA

                                    ***MENSTRUAL IRREGULARITIES

                                    ***NAUSEA AND VOMITING

 

                                    +++1/ MECHLORETHAMINE

                                    +++ 2/ CYCLOPHOSPHAMIDE

                                    +++ 3/ MELPHALAN [L-SARCOLYSIN]

                                    +++4/CHLORAMBUCIL

 

1- THERAPEUTIC USES:           ***HODGKIN'S AND NON HODGKIN'S

                                                                        |

                                                COMBINED WITH:

                                                MOPP { -VINCRISTINE

                                                                        {-PROCARBAZINE

                                                                        {-PREDNIZONE

 

                                                *** TRT MYCOSIS FUNGOID

 

ADVERSE EFFECT:    -MYELOSUPPRESSION

                        -NAUSEA AND VOMITING

                        -ALOPECIA

                        -MENSTRUAL IRREGULARITIES

 

2- CYTOTOXIC SPECIFIE= PHOSPHARAMIDE MUSTARD + ACROLEIN

 

1.       ***HODGKIN'S DISEASE

2.       ***BURKITT'S LYMPHOMA

3.       ***OVARIAN AND BREAST CARCINOMAS

4.       ***OAT CELLS LUNG ***NEUROBLASTOMA

 

ADVERSE EFFECTS:    -RARELY THROMBOCUTOPENIA

                                    -ALOPECIA

                                    -10% STERILE HEMORRHAGIC CYSTITIS

-PROLONGED TRT: -INTERSTITIAL PULMONARY FIBROSIS -FATAL CARDIOMYOPATHY

 


 

3-MELPHALAN [L-SARCOLYSIN]: GI ABSORPTION

USED : -MULTIPLE MYELOMA+++

                        -BREAST KC

                        -OVARIAN KC

 

ADVERSE EFFECTS:    -MYELOSUPPRESSION

-VOMITING -NAUSEA

-ALOPECIA RARE

 

 

4-CHLORAMBUCIL:      -GI ABSOPTION

                                    -COMPLETELY METABOLIZED

                                    -IT IS THE SLOWEST ACTING NITROGEN MUSTARD USED:    

 

·         -CHRONIC LYMPHOCYTIC LEUKEMIA

·         -WALDENSTROM'S MACROGLOBULINEMIA

·         -HODGKIN'S DISEASE AND NON HODGKIN'S LYMPHOMAS

 

                                    ADVERSE EFFECTS -MYELOSUPPRESSION

                                    -NAUSEA-VOMITING

 

TRT CHEMOTHERAPY GN:

 

CELL CYCLE AND ANTI KC THERAPY

 

A/ GROWTH OF A TUMOR:

***FRACTION OF THE TOTAL ALL POPULATION THAT IS PROLIFERATING ***TIME REQUIRED FOR AN INDIVIDUAL CELL TO DIVIDE [CELL CYCLE TIME] ***RATE OF CELL LOSS

ANTITUMOR AGENT: 2 GN CLASSES:

           

1.       ***PHASE SPECIFIC AGENTS

ACT AT SPECIFIC PHASES OF THE CELL CYCLE: +++HYDROXYUREA}

            KILL ON THE S              PHASE +++CYTARABINE  }

           

2. ***PHASE NON SPECIFIC AGENTS

                        +++5-FLUOROURACIL

                        +++CYCLOPHOSPHAMIDE

 

            ***METHOTREXATE KILLS CELLS IN THE S PHASE BUT ALSO INHIBITS RNA SYNTHESIS IN G1 AND G2 PHASES===> LIMITING ITS OWN CYTOTOXICITY -COMMON SIDE EFFECTS:

            ***MYELOSUPPRESSION

            ***GI BLEEDING AND ULCERS-NAUSEA-VOMITING

            ***ALOPECIA

            ***NEPHROTOXICITY

            ***TERATOGENESIS,ABORTION

            ***IMMUNOSUPPRESSION

 

 

CLASSIFICATION:

1.       ***ALKYLATING AGENTS

2.       ***ANTIMETABOLITES

3.       ***NATURAL PRODUCTS

4.       ***HORMONES AND ANTAGONISTS

5.       ***MISCELLANEOUS AGENTS

 

===========================================================================================================================================================

 

 

 

***50% OF ALL NEW DIAG KC PATIENTS WILL BE CURED OF THEIR DISEASE ***CHEMOTHERAPY IS

 

***CHEMOTHERAPY POSSESSES NUMEROUS SIDE EFFECTS, SUCH NAUSEA VOMITING AND SUPPRESSION OF BONE MARROW. ***NEW AGENT ARE CELL CYCLE SPECIFIC

 

***CYCLOPHOSPHAMIDE

 

            ***THEY ARE STRUCTURALANALOGUES OF NATURALLY OCCURING SUBSTANCES .

 

            ***PREDNISONE

            ***VINCRISTINE

            ***PROCARBAZINE

            ***MECHLORETHAMINE

 

            ***THEY ARE ABLE TO FORM COVALENT COVALENT BONDS WITH NUCLEOPHILIC  SITES ON NUCLEIC ACIDS

                        ***THEY ARE CYTOTOXIC OWING TO THEIR ACTIVITY AGAINST DNA

                        ***THEY ARE ABLE TO FORM A POSITIVE CARBONIUM ION

                        ***THEY CAN AFFECT ANY PART OF THE CELL CYCLE

 

                       ***DOXORUBICIN [ADRIAMYCIN]

 

            ALSO: STOMATITIS-ALOPECIA-BONE MARROW DEPRESSION-

=ANTHRACYCLINE :     ***DOXORUBICIN

                                    ***DAUNORUBICIN

                                    ***MITOXANTRONE

 

            ACTION :          ***INTERCALATION WITH DNA AND RNA ==> DNA AND RNA ARE DISTORTED

            ***PHASE NON SPECIFIC

            ***TISSUE CYTOTOXICITY

            ***CARDIOTOXICITY =CHRONIC CARDIOMYOPATHY AND ACUTE

 

DOXORUBICIN:            ***SOLID TUMOR

                                    ***ACUTE LEUKEMIAS

                                    ***MALIGNANT LYMPHOMAS

 

DAUNORUBICIN:          ***ACUTE LYMPHOCYTIC AND GRANULOCYTIC LEUKEMIA

 

MITOXANTRONE: LESS TOXIC THAN DAUNORUBICIN WHEN COMBINED WITH CYTARABINE FOR INITIAL TRT OF ACUTE NONLYMPHOCYTIC LEUKEMIA.

***ADVANCED BREAST KC

 

 

            ***5-FLUOROURACIL

            ***METHOTREXATE

            ***6-MERCAPTOPURINE

            ***VINCRISTINE

 

 

 

***IT INHIBITS THE METABOLISM OF 6-MERCAPTOPURINE

***IT INCREASES THE ANTINEOPLASTIC ACTION OF 6-MERCAPTOPURINE ***IT INHIBITS XANTHINE OXIDASE

            ***IT DECREASES SERUM URIC ACID LEVEL.

 

            ***THEY CROSS CELL MEMBRANES EASILY

***THEY BIND TO A FAMILY OF INTERCELLULAR PROTEIN =CYCLOPHILLINS ***THEY INHIBIT THE PRODUCTION OF IL 2 BY HELPER T CELLS.

***ACTIVE BIOTRANSFORMATION OF CYCLOSPORINE IS BY CYTOCHROME P-450.

 

            ***IT HAS LITTLE ACTION ON AN ETABLISHED GRAFT REJECTION

***IT HAS NON SELECTIVE ACTION IN THE SUPPRESSION OF LYMPHOID CELLS

            ***IT GREATLY INCREASES THE SUSCEPTIBILITY OF THE PATIENT TO INTERCURRENT INFECTIONS. AZATHIOPRINE IS CONVERTED BY THE BODY TO MERCAPTOPURINE.

WELL ABSORBED BY GI

 

LATE TOXICITY = RISK OF MALIGNANCY [SKIN KC-LYMPHOID TUMORS]

 

 

            ***BINDS TO SITES ON THE ENZYME DIHYDROFOLATE REDUCTASE.

            ***INDICATED IN:

***ANTIMETABOLITE

 

 

 

***INHIBIT THE SYNTHESIS OF PROSTAGLANDINS AND LEUKOTRIENES

            ***LYSE T CELLS

***INCREASE CATABOLISM OF GAMMA G GLOBULIN [IG G] ON CONTINUOUS ADMINISTRATION

***DIMINISH THE ABILITY TO WITHSTAND INFECTIONS AND HEAL WOUNDS.

 

                                              ***INHIBITION OF THE FUNCTION OF MICROTUBULE

 

                                                            ***VINBLASTINE

 

BOTH BIND TO TUBULINE===> INTERFERING WITH ASSEMBLING OF SPINDLE PROTEINS DURING MITOSIS M-PHASE SPECIFIC==> BLOCKING PROLIFERATING CELLS AS THEY ENTER METAPHASE CAUSING CELL DEATH. METABOLIZED IN THE LIVER EXCRETED IN THE BILE.

 

CROSS RESISTANCE DOES NOT APPEAR TO OCCUR IN HUMAN TUMORS.

 

            -LYMPHOMAS -----NEUROBLASTOMAS

            -LETTERER-SIWE DISEASE

·         ACUTE LYMPHOBLASTIC LEUKEMIA

·         HODGKIN'S DISEASE AND NON HODGKIN'S

·         SOLID TUMOR IN CHILDREN

·         TUMOR OF THE BREAST

·         LUNG

·         CERVIX

 

 

                        PARESTHESIA

                        JAW PAIN

 

 

 

 

 

 

 

1.       FLUOROURACIL: ORAL AND GI ULCERATION ASPARAGINASE:PANCREATITIS

2.       CYCLOPHOSPHAMIDE

·         [CYTOXAN]:            ***ASEPTIC

·                                       ***HEMORRHAGIC

                                                            ***CYSTITIS

·         CIS-DIAMMINEDICHLOROPLATINIUM [PLATINOL]:            ***NEPHROTOXICITY

·         PROCARBAZINE [MATULANE]:       ***PERIPHERAL NEUROPATHY

·         CHLORAMBUCIL: MACROGLOBULINEMIA

1.       FLUOURACIL:        CARCINOMA OF THE COLON

2.       DACARBAZINE: MELANOMA

3.       TAMOXIFEN:          BREAST KC

4.       RADIOACTIVE IODINE: CARCINOMA OF THE THYROID

 

 

                                    ***HODGKIN'S DISEASE

                                    ***BURKITT'S LYMPHOMA

                                    ***OVARIAN CARCINOMA

                                    ***BREAST CARCINOMA

 

                                    ***IT CAN BE USED IN THE TRT OF PSORIASIS

                                    ***IT IS ELIMINATED BY THE KIDNEY

                                    ***IT IS A SELF LIMITING S-PHASE SPECIFIC DRUG

                                    ***IT COMPETITIVELY INHIBITS DIHYDROFOLATE REDUCTASE

 

 

                                    ***FOLIC ACID ANALOGS

                                    ***PURIMIDINE

                                    ***PURINE AND RELATED INHIBITOR

 

===========================================================================================================================================================

TUMORS AND IMMUNOLOGY:

 

·         SPONTANEOUS REGRESSION OF SOME TUMOR :           

                                                                                          ***MALIGNANT MELANOMA

                                                                                          ***NEUROBLASTOMA

 

·         LONG TERM INDOLANCE OF SOME TUMOR THEN SUDDENLY METASTASIZE

·         PRESENCE OF MONOCLONAL CELL INFILTRATE IN SITU IN INFLAMMATORY CARCINOMAS CORRELATES WITH IMPROVED SURVIVAL RATES.

·         IMMEDIATE AND DELAYED HYPERSENSITIVITY.TO AUTOLOGUS TUMOR CELL EXTRACTS IN SKIN REACTION TEST.

·         THE INCIDENCE OF MALIGNANCY IS HIGHEST IN THE NEONATALE PERIOD AND IN OLD AGE, WHEN THE IMMUNE SYSTEM FUNCTIONS LESS EFFECTIVELY .

 

1.                   CHILDREN WITH CERTAIN CONGENITAL IMMUNODEFICIENCIES ARE AT INCREASED RISK FOR KC:

i)                    LYMPHOMAS AND ACUTE MYELOGENOUS LEUKEMIA OCCUR IN 10-30% OF CHILDREN WITH WISKOTT-ALDRICH SYNDROME.

ii)                  NON HODGKIN’S LYMPHOMA AND STOMAC KC ARE MORE COMMON IN CHILDREN  WITH ATAXIA TELANGIECTASIA AND COMMON IMMUNODEFICIENCY THAN THEY ARE IN AGE MATCHED HEALTHY CHILDREN.

2.                   ANOGENITAL CARCINOMAS [CERVIX KC+++] ARE INCREASED

 

 

 

 

 

·         NEUROBLASTOMA:

***THE LYMPHOCYTES OF CHILDREN WITH NEUROBLASTOMA ARE CYTOTOXIC TO THE CELLS OF THIS TUMOR BUT EXPRESS NO TOXICITY AGAINST NORMAL CELLS OR CELLS OF OTHER TUMORS.

 

***LYMPHOCYTES FROM MOTHERS OF CHILDREN WITH NEUROBLASTOMA DEMONSTRATE IN VITRO TUMOR SPECIFIC CYTOTOXICITY TOWARD NEUROBLASTOMA TUMOR CELLS BUT TOWARD OTHER TUMOR CELL TYPE.

 

***IN SOME CASE CHILDREN AND MOTHER HAVE ANTIBODIES THAT ARE CYTOTOXIC FOR THE NEUROBLASTOMA CELLS .

IN OTHER CASES , THE SERUM DOES NOT KILL THE TUMOR CELLS BUT INSTEAD PROTECTS THEM THROUGH BLOCKING FACTORS SUCH AN ANTIGEN - ANTIBODY COMPLEX.

 

·         TUMOR ASSOCIATED ANTIGENS [TAA] INCREASES PROPORTIONALLY WITH TUMOR GROWTH AND DECREASES WITH TUMOR RESPONSE TO TRT.

1.       NEOANTIGENS MAY EXIST IN THE NUCLEUS , THE CYTOPLASM, OR THE CELL MEMBRANE

2.       NEOANTIGENS MAY BE EXCRETED FROM THE  CELL.[HORMONES: HCG (TESTIS KC) - ACTH ( LUNG KC).


 

 

ANTIGENS ASSOCIATED WITH HUMAN MALIGNANCY [NON SPECIFIC]

ANTIGEN

TUMOR

VIRAL

1.       HEPATITIS B

2.       HUMAN PAPILLOMA VIRUSES 16 AND 18

3.       EPSTEIN BARR

4.       HUMAN T CELL LEUKEMIA VIRUS I [HTLV-1]

 

 

·         PRIMARY LIVER KC

 

·         CERVICAL CARCINOMA

 

·         BURKITT’S LYMPHOMA

·         NASOPHARYNGEAL   KC

·         ADULT T CELL LEUKEMIA

ONCOFETAL

1.       CARCINOEMBRYONIC

2.       ALPHA PROTEIN

 

·         COLORECTAL CARCINOMA

·         PANCREATIC CARCINOMA

·         PRIMARY LIVER KC

·         TESTICULAR AND OVARIAN KC

·         GASTRIC AND PANCREATIC KC

OTHER

1.       MYELONEMA PROTEINS

2.       PROSTATE SPECIFIC ANTIGENS

3.       PROSTATIC ACID PHOSPHATASE

4.       S-100 CALCIUM BINDING PROTEIN

5.       CA-125 GLYCOPROTEIN

6.       CA 19-9 GLYCOPROTEIN

7.       15-3 GLYCOPROTEIN

 

 

·         MULTIPLE MYELOMA

·         PROSTATIC KC

·         PROSTATIC KC

·         MELANOMA

·         OVARIAN KC

·         PANCREATIC KC

·         BREAST - LUNG KC

 

 

 

·         TAAs MAY BE ANTIGENS THAT ARE COMPLETELY UNIQUE TO A PARTICULAR TUMOR IN A SPECIFIC PERSON. THEY ACCOMPANIES CARCINOGENE INDUCED CANCERS.

1.       THE CARCINOGEN ACTS AS A MUTAGEN

2.       TAAs MORE COMMONLY ARE SIMILAR IN ALL PEOPLE CARRYING A PARTICULAR TUMOR:

·         ANTIGENS = TUMOR SPECIFIC ANTIGENS [TSAs] CAN BE FOUND IN MORE THAN ONE TYPE TUMORS OR EVEN IN NONMALIGNANT DISEASES.

3.       SOME TUMORS EXPRESS NORMAL ANTIGENS IN EXCESSIVE AMOUNTS:

·         MYELOMA PROTEINS [B CELLS OUT OF CONTROL AND BECAME MALIGNANT]

·         COMMON ACUTE LYMPHOBLASTIC LEUKEMIA ANTIGEN [ CALLA] = CHILDHOOD LEUKEMIA

- NORMALLY , CALLA IS EXPRESSED ONLY ON B-CELL PROGENITORS , WHICH COMPRISE LESS THAN 1% OF NORMAL BONE MARROW CELLS.