CD5789 in Early Cutaneous T-Cell Lymphoma (CTCL)

Study Drug Administration:

If you are found to be eligible to take part in this study, you will apply CD5789 cream 1
time each day. You should do this after you wash the area.

During your first study visit, the study staff will select which lesions you will apply
cream to. The study staff will tell you how much cream to apply.

On Day 1, the study staff will apply the study drug on half of the lesions. You will apply
the study drug to the rest of the lesions while the study staff watches. In a diary, the
study staff will write down the time you applied the study drug. You must write down this
information in the diary when you apply the study drug at home. On your Week 1 visit, you
will apply the study drug at the clinic while the study staff watches.

You will use gloves to apply the study drug in a thin film on the lesions. Be careful not to
overlap healthy skin. You should massage the study drug gently into the skin. If someone
helps you apply the study drug, they must also wear gloves.

Bring the diary with you to each visit. You should return all unused study drug and/or empty
tubes at each study visit.

You must avoid exposing the treated areas to the sun (you should wear clothing to cover
these areas). You should also not swim or take a bath while on study, but you can take a
shower at least 2 hours after you apply the drug.

If your skin is dry, you will be given a moisturizer (such as Cetaphil Restoraderm Skin
Restoring Moisturizer) to use.

Study Visits:

At all study visits, you will asked about any drugs you may be taking or any side effects
you may have had.

On Day 1:

- Any skin lesions will be measured and photographed. Your private areas will be covered
as much as possible, and a picture of your face will not be taken.

- You will have a skin biopsy to check the status of the disease. To perform a skin
biopsy, an area will be numbed with anesthetic and a small amount of skin will be
removed with a small knife. The skin biopsy will be done before you apply the study
drug.

- You will have tape stripping to measure any inflammatory markers on the skin.
Inflammatory markers may be related to the status of the disease. To have tape
stripping, small special pieces of tape will be applied to 1 skin lesion and to an area
of normal skin next to it. When the tape loses it stickiness it will be collected by
the study staff.

- You will have an EKG to check your heart function.

- You will be asked about how much you itch and if you have any burning or stinging
sensations after applying the study drug.

- If you can become pregnant, urine will be collected for a urine pregnancy test.

At Weeks 1, 2, 4, and 8:

- Any skin lesions will be measured and photographed.

- You will be asked about how much you itch and if you have any burning or stinging
sensations after applying the study drug.

At Weeks 4 and 8, if you can become pregnant, urine will be collected for a urine pregnancy
test.

Length of Study:

You may continue using the study drug for up to 12 weeks, as long as the study doctor thinks
it is in your best interest. You will no longer be able to use the study drug if the disease
gets worse, if intolerable side effects occur, or if you are unable to follow study
directions.

Your participation on the study will be over when you have completed the end-of-study visit.

All samples collected during the study will be destroyed after the study has been completed
and all patients are off study.

End-of-Study Visit:

On the last day you apply the study drug (Week 12), you will have an end-of-study visit:

- You will be asked about any other drugs and treatments you may be receiving.

- You will have a physical exam, including measurement of your vital signs.

- Any skin lesions will be examined and photographed.

- Blood (about 2½ teaspoons) will be drawn for routine tests. and to tests for HIV and/or
hepatitis.

- Blood (about 1 teaspoon each time) will be drawn for pharmacokinetic (PK) testing 12
hours after the study drug is applied at home PK testing measures the amount of study
drug in the body at different time points.

- You will have an EKG to check your heart function.

- You will have a skin biopsy to check the status of the disease.

- You will have tape stripping to measure any inflammatory markers on the skin.

- If you can become pregnant, urine will be collected for a pregnancy test.

This is an investigational study. CD5789 is not FDA approved or commercially available. It
is currently being used for research purposes only.

Up to 10 patients will take part in this study. All will be enrolled at MD Anderson.

Inclusion Criteria:

1. The Subject is a male or female, who is at least 18 years of age at Screening visit.

2. The Subject has a clinical diagnosis of stable CTCL early stage (IA-IIA). The subject
has :a) A known stable TNMB stage (cancer classification based on analysis of Tumors,
Nodes, Metastasis and Blood), or b) Stable patch or plaque lesions that have not
responded to topical treatment with corticosteroids or nitrogen mustard or which have
relapsed after prior therapy.

3. The Subject presents at least 3 distinct lesions (one selected as index lesion, one
dedicated to biopsy and another one dedicated to tape-stripping).

4. If the Subject is a female of childbearing potential, she agrees to use a highly
contraceptive method for the duration of the study and for one month after the last
product application. A highly effective method of contraception is defined by: 1)
Bilateral tubal ligation 2) Combined oral contraceptives (estrogen and progesterone)
implanted or injectable contraceptives, on a stable dose for at least 1 month prior
to screening visit, 3) Hormonal intra-uterine device (IUD), inserted at least one
month prior to the Screening visit.

5. If the Subject is female of childbearing potential, she has at Screening (at least 14
days before Baseline) and at Baseline a negative result for urine pregnancy test
(UPT)having a sensitivity down to at least 25 Ul/ml for human chorionic gonadotrophin
(hCG).

6. If the Subject is a female of non-childbearing potential, she has to be
postmenopausal (absence of menstrual bleeding for at least one year and without any
other medical reason), or presenting with a hysterectomy or a bilateral ovariectomy.

7. The Subject is willing and able to comply with all of the time commitments and
procedural requirements of the clinical trial protocol.

8. The Subject has understood and signed an Informed Consent Form (ICF) at Screening,
prior to an investigational procedures being performed.

9. The Subject is apprised of the Health Insurance Portability and Accountability Act
(HIPAA), and is willing to share personal information and data, as verified by
signing a written authorization at the screening.

Exclusion Criteria:

1. The subject has any uncontrolled or serious disease (other than CTCL), or any medical
or surgical condition, that may either interfere with the interpretation of the
clinical trial results, and/or put the subject at significant risk (according to
Investigator's judgment) if he/she participates in the clinical trial.

2. The subject has known or suspected allergies or sensitivities to any components of
the study drug (see Investigator's Brochure).

3. The subject, if female, has a positive urinary pregnancy test, is breast-feeding or
is planning a pregnancy during the course of the study.

4. If the subject needs a relative to apply the study product, the relative is a female
who is pregnant, lactating or intends to conceive during the clinical study or within
1 month after the last product application.

5. The subject is in an exclusion period from a previous clinical study, takes part into
any other clinical trial of a drug or device, OR participated within 1 month prior to
baseline.

6. The subject has used any of the following treatments or procedure before the first
study treatment application (Baseline) within the wash-out periods defined below:
corticoids or Aldera (imiquimod) 4 weeks; retinoids, nitrogen mustard
(mechlorethamine), Carmustine (BCNU), or phototherapies 2 weeks, any systemic
treatment dedicated to CTCL within 4 weeks.

7. The subject is unwilling to refrain from use of prohibited medication during the
clinical trial.

8. The subject has an abnormal ECG judged clinically significant by the investigator
and/or PR interval outside the range of 120 ms to 220 ms, QRS>120 ms, and corrected
QT interval (QTc)>450 ms.

9. The subject presents seropositivity for hepatitis B surface antigen(HBsAG), hepatitis
C virus (HCV) antibody and /or human immunodeficiency virus (HIV) 1 and 2 antibody.

10. The subject is vulnerable (such as deprived of freedom) as defined in Section 1.61 of
International Conference on Harmonisation (ICH) Guideline for Good Clinical Practice
(GCP).