Browse Health
Internist, Infectious Disease Specialist (virus, bacteria, parasites)
40 years of experience
Accepting new patients


Education ?

Medical School Score
Thomas Jefferson University (1972)

Awards & Distinctions ?

Compassionate Doctor Recognition (2010)
American Board of Internal Medicine

Affiliations ?

Dr. Pitchon is affiliated with 4 hospitals.

Hospital Affiliations



  • Cedars-Sinai Medical Center
    8700 Beverly Blvd, West Hollywood, CA 90048
    Top 25%
  • Brotman Medical Center
    3828 Delmas Ter, Culver City, CA 90232
    Top 50%
  • John Muir Medical Center-Concord Campus
  • Olympia Medical Center
  • Publications & Research

    Dr. Pitchon has contributed to 8 publications.
    Title High Incidence of Anergy in Inflammatory Bowel Disease Patients Limits the Usefulness of Ppd Screening Before Infliximab Therapy.
    Date August 2004
    Journal Clinical Gastroenterology and Hepatology : the Official Clinical Practice Journal of the American Gastroenterological Association

    BACKGROUND & AIMS: Reports of tuberculosis (TB) in patients administered infliximab prompted the Food and Drug Administration to recommend that all patients being considered for this therapy be evaluated for the risk for latent TB infection by means of a tuberculin skin test (TST). The aim of this study is to evaluate the utility of a TST as an adequate screen for TB exposure in patients with inflammatory bowel disease (IBD). METHODS: Eighty-two consecutive patients with IBD (Crohn's disease, 70 patients; ulcerative colitis, 4 patients; indeterminate colitis, 8 patients) seen at Cedars-Sinai Medical Center IBD Center (Los Angeles, CA) being treated with or considered for infliximab therapy underwent a standard intradermal purified protein derivative (PPD) TST before or between infusions of infliximab. One or more control antigens (Candida, tetanus, and/or mumps) were concurrently placed on 69 of these patients. Skin tests were read for induration at 48-72 hours after placement, and results were recorded. RESULTS: None of 82 patients had a positive PPD TST result. Overall, 71% of patients (49 of 69 patients) with controls placed failed to react to any antigen. Eighty-three percent of patients (40 of 48 patients) who were administered corticosteroids and/or immunosuppressive medications, not including infliximab, for at least 1 month were anergic compared with 43% of patients (9 of 21 patients; P < 0.002) who were not administered those medications. CONCLUSIONS: Given the high prevalence of anergy, a negative TST result in patients with IBD administered infliximab is an unreliable indicator for TB exposure. Evaluation for TB risks should include not only a TST, but also a detailed history of travel, TB exposures, and such symptoms as chronic cough and weight loss, and a chest radiograph should be considered.

    Title Bronchiolitis Obliterans Organizing Pneumonia in a Patient with Aids.
    Date October 1994
    Journal Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America

    A 35-year-old homosexual man who had a remote history of cocaine abuse presented to the hospital with fever, chills, drenching night sweats, and progressive dyspnea of 3 months' duration. His condition had been diagnosed as AIDS 1 1/2 years before presentation. Multiple blood cultures and serological tests failed to yield an infective etiology. Bronchoscopy with transbronchial biopsy, both performed twice, also failed to reveal an etiology. Empirical treatment for infection with the Mycobacterium avium complex yielded no response; empirical treatment, based on abnormalities revealed by gallium scanning, for Pneumocystis carinii pneumonia led to some clinical improvement. Because of rapid respiratory deterioration at the end of this treatment course, a thoracoscopic lung biopsy was performed; this procedure demonstrated classic bronchiolitis obliterans organizing pneumonia. Corticosteroid therapy resulted in a rapid salutary response. It is important to aggressively pursue a definitive diagnosis for selected patients with a nonidentifiable infectious cause so that patients receive the correct treatment.

    Title Fungal Sinusitis in Patients with Aids: Report of 4 Cases and Review of the Literature.
    Date May 1994
    Journal Medicine

    We report here 3 cases of aspergillus sinusitis in patients with AIDS and the 1st fully described case, to our knowledge, of sinusitis associated with Pseudallescheria boydii in a patient with AIDS. We review the microbiology and pathology of fungal sinusitis in patients with AIDS and the morphologic and clinical features and treatment of P. boydii infection and aspergillus sinusitis. Fungal sinusitis in patients with HIV or AIDS generally occurs later in the course of primary disease with low CD4+ lymphocyte counts (< 50/mm3), unlike bacterial sinusitis which may occur at any time. Differentiation between invasive and noninvasive forms is likely not important, in contrast to fungal sinusitis in noncompromised patients. The number of cases is likely to increase as the number of patients with AIDS increases, patients survive longer, and other opportunistic infections are prevented or treated. Causative agents are likely to be resistant to fluconazole, which is in widespread use. Aspergillus sinusitis in patients with HIV or AIDS occurs in both those with and without traditional risk factors. Fungal sinusitis may present vexing management problems and be relentlessly progressive in the face of therapy. Ideal therapy has yet to be defined but an early combined surgical and medical approach in these compromised patients is preferred.

    Title Pneumocystis Carinii in Fna of the Thyroid.
    Date February 1992
    Journal Diagnostic Cytopathology

    We report the diagnosis of Pneumocystis carinii (PC) in a fine-needle aspirate (FNA) from the thyroid of a human immunodeficiency virus infected (HIV+) male receiving aerosolized pentamidine as prophylaxis for Pneumocystis carinii pneumonia (PCP). The clinical diagnosis prior to FNA was multinodular goiter. The patient did not have pulmonary symptoms nor previous diagnosis of PCP at the time of the aspirate diagnosis. Recently, extrapulmonary Pneumocystis carinii (EPC) has been reported with increasing frequency in HIV+ patients receiving prophylactic aerosolized pentamidine. Awareness of extrapulmonary presentations of Pneumocystis carinii infection is a prerequisite for accurate cytologic diagnosis.

    Title Hematogenous Osteomyelitis of the Tarsal Navicular Bone.
    Date October 1985
    Journal The Journal of the Medical Society of New Jersey
    Title The Effector Cells in Human Peripheral Blood Mediating Mitogen-induced Cellular Cytotoxicity and Antibody-dependent Cellular Cytotoxicity.
    Date February 1977
    Journal Journal of Immunology (baltimore, Md. : 1950)

    The identity of the effector cells in human peripheral blood capable of mediating mitogen-induced cellular cytotoxicity (MICC) and antibody-dependent cellular cytotoxicity (ADCC) was investigated utilizing effector cell populations consisting of purified polymorphonuclear leukocytes, macrophages, lymphocytes, and cell surface immunoglobulin (sIg)-negative and sIg-positive lymphocyte subpopulations obtained by Sephadex anti-Fab immunoabsorbent column fractionation techniques. Chicken erythrocytes (CRBC) and Chang liver cells were used as target cells in both cytotoxicity assays. With CRBC targets MICC was mediated by polymorphonuclear leukocytes, macrophages, sIg-positive lymphocytes (B cells), and sIg-negative lymphocytes. On the contrary, with Chang liver cells as targets, MICC was mediated only by lymphocytes, and effector cells occurred exclusively in sIg-negative lymphocyte subpopulations containing thymus-derived lymphocytes (T cells). Further purification of sIg-negative lymphocyte subpopulations on antigen-antibody coated plastic surfaces yielded a nonadherent T lymphocyte population depleted of Fc receptor-bearing lymphocytes that was capable of mediating MICC against both CRBC and Chang cell targets. With use of CRBC targets, ADCC was mediated by polymorphonuclear leukocytes, macrophages, and sIg-negative lymphocyte subpopulations. However, with Chang cell targets, ADCC was mediated only by lymphocytes, and effector cells were present only in sIg-negative lymphocyte subpopulations. SIg-positive lymphocytes (B cells) and T lymphocytes were not effective in mediating ADCC against either CRBC or Chang cell targets. These studies demonstrate that the nature of the target cell employed in MICC and ADCC reactions is of critical imporatnce in defining the effector cell(s) capable of mediating cytotoxicity.

    Title Infective Endocarditis Following Human-to-human Enterococcal Transmission: a Complication of Intravenous Narcotic Abuse.
    Date November 1976
    Journal Archives of Internal Medicine

    Two heroin addicts, husband and wife, who shared injection paraphernalia extensively, developed enterococcal endocarditis within six weeks of one another. The etiologic organisms were of the same subspecies and had identical antibiotic susceptibilities and biochemical profiles. The clinical, epidemiologic, and bacteriologic data strongly suggest human-to-human transmission of the pathogen.

    Title Dilantin Toxicity: Miliary Pulmonary Infiltrates and Hypoxemia.
    Date November 1976
    Journal Annals of Internal Medicine

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