Dr. Long obtained dual undergraduate degrees in Economics and Art History from Stanford prior to enrolling at UCSF where he completed his MD, a post-sophomore fellowship in Pathology, residency in Anatomic Pathology, a Fellowship in Surgical Pathology, and a Clinical Instructorship in Cytopathology.

He then spent sixteen years in community practice honing his expertise in fine needle aspiration, cytopathology, and surgical pathology. Dr. Long was one of the first pathologists to pioneer the use of ultrasound guided fine needle aspiration biopsies in an outpatient clinic setting, helping to establish USFNA as a core component to contemporary cytopathology practices. During this time he also gained valuable leadership and business experience including directing two cytopathology laboratories, overseeing billing and outreach operations, and serving four consecutive terms as president of one of the largest community practice groups in California (serving 10 locations, two large clinical labs, 7 area hospitals, and providing services for over 150,000 anatomic pathology specimens/yr).

Dr. Long returned to Stanford in 2012 to join the Department of Pathology in the sections of Cytopathology and Surgical Pathology. He has been active teaching USFNA, cytopathology, and surgical pathology to residents and fellows and his research interests primarily focus on expanding and refining the role of fine needle aspiration in supporting diagnosis, precision medicine, and clinical trial research.

His current administrative roles include: Director of Anatomic Pathology (which oversees the sections of Surgical Pathology, Cytopathology, Dermatopathology, Hematopathology, Neuropathology, and Autopsy), Director of Surgical Pathology, Director of the Histology Laboratory, and Director of the Immunohistochemistry Laboratory. He is also currently a member of the Stanford Medicine Leadership Academy (SMLA).

Clinical Focus

  • Cytopathology
  • Surgical Pathology
  • Fine Needle Aspiration
  • Ultrasound Guided Fine Needle Aspiration
  • Head & Neck Surgical Pathology
  • Genitourinary Surgical Pathology
  • Pathology

Academic Appointments

Administrative Appointments

  • Director of Anatomic Pathology, Department of pathology (2016 - Present)
  • Director of Surgical Pathology, Department of Pathology (2014 - Present)
  • Medical Director (Pathology and Clinical Laboratory), Stanford Cancer Center South Bay (2016 - Present)
  • Director of Histology and Immunohistochemistry Laboratories, Department of Pathology (2012 - Present)
  • Interim Vice Chair, Anatomic Pathology, Department of Pathology (2015 - 2016)

Honors & Awards

  • Teaching Award, Stanford Department of Pathology (6/2013)

Boards, Advisory Committees, Professional Organizations

  • Membership Committee, American Society of Cytology (2015 - Present)
  • Member, ASCP (1996 - Present)
  • Member, CAP (2004 - Present)
  • member, USCAP (2014 - Present)

Professional Education

  • Board Certification: Pathology, American Board of Pathology (2014)
  • Board Certification: Cytopathology, American Board of Pathology (1997)
  • Board Certification: Anatomic Pathology, American Board of Pathology (1996)
  • Fellowship:University of California San Francisco (1996) CA
  • Fellowship:UCSF - Dept of Cardiology (1995) CA
  • Residency:University of California at San Francisco School of Medicine (1995) CA
  • Medical Education:University of California San Francisco (1992) CA
  • Fellowship, UCSF, Surgical Pathology (1995)
  • Fellowship/ Clinical Instructor, UCSF, Cytopathology (1996)
  • Undergraduate Education, Stanford University, Economics; Art History (1983)

Community and International Work

  • Guide Dogs for the Blind


    Puppy raising

    Populations Served




    Ongoing Project


    Opportunities for Student Involvement


Research & Scholarship

Clinical Trials

  • Study of SD-101 in Combination With Localized Low-dose Radiation in Patients With Untreated Low-grade B-cell Lymphoma Not Recruiting

    To assess the safety and tolerability of escalating doses of SD-101 in combination with localized low-dose radiation therapy in adult subjects with untreated low-grade B-cell lymphoma.

    Stanford is currently not accepting patients for this trial. For more information, please contact Kathleen McDonald, 650-725-8589.

    View full details

  • Comparison of Ro 31-8959 Plus Zidovudine (AZT) Versus AZT Plus Zalcitabine (ddC) Versus Ro 31-8959 Plus AZT Plus ddC Not Recruiting

    PRIMARY: To determine the efficacy and toxicity of three treatment regimens: saquinavir mesylate (Ro 31-8959) plus zidovudine (AZT) vs. AZT plus zalcitabine (dideoxycytidine; ddC) vs. Ro 31-8959 plus AZT plus ddC. SECONDARY: To investigate the pharmacokinetics and effects on various clinical parameters of the three regimens.

    Stanford is currently not accepting patients for this trial.

    View full details

  • The Effects of Staggered Dosing on Interactions Between Paired Combinations of Nelfinavir, Ritonavir, and Saquinavir Not Recruiting

    The purpose of this study is to see if staggering doses of nelfinavir, ritonavir, and saquinavir has any effect on the interactions between these drugs.

    Stanford is currently not accepting patients for this trial.

    View full details

  • Evaluation of Patients Who Have Not Had Success With Zidovudine Not Recruiting

    To determine the relationship of viral susceptibility to zidovudine (AZT) and baseline viral load (as determined by plasma viremia and quantitative endpoint dilution). To determine the relationship between viral load and susceptibility during different antiretroviral therapy strategies. To correlate measures of viral load and short term clinical and laboratory markers (such as weight, CD4 count, p24 antigenemia, and beta2 microglobulin) on the different therapy arms. High-grade resistance to AZT has been detected in HIV isolates from approximately 25 percent of individuals with AIDS who received AZT for at least 1 year. To elucidate the clinical significance of in vitro AZT resistance, it is necessary to distinguish between clinical failure caused by AZT resistance and clinical decompensation caused by other factors.

    Stanford is currently not accepting patients for this trial.

    View full details

  • A Multi-Center Study of Ibrutinib in Combination With MEDI4736 in Subjects With Relapsed or Refractory Lymphomas Not Recruiting

    The purpose of this study is to evaluate the efficacy, safety and tolerability of the combination treatment of ibrutinib and MEDI4736 in patients with relapsed or refractory lymphomas.

    Stanford is currently not accepting patients for this trial. For more information, please contact Cancer Clinical Trials Office (CCTO), 650-498-7061.

    View full details


2016-17 Courses

Graduate and Fellowship Programs

  • Cytopathology (Fellowship Program)


All Publications

  • Low-grade lymphoma of mucosa-associated tissue in the parotid gland: A case report of fine-needle aspiration cytology diagnosis using flow cytometric immunophenotyping DIAGNOSTIC CYTOPATHOLOGY Cha, I., Long, S. R., Ljung, B. M., Miller, T. R. 1997; 16 (4): 345-349


    A 66-year-old woman with Sjögren's syndrome for 7 years presented with an enlarged right parotid gland. The left parotid gland, which showed myoepithelial sialadenitis (MESA), had been resected 4 years earlier. A fine-needle aspiration (FNA) biopsy of the right parotid gland was performed. Examination of the smears revealed cells of intermediate size with a round-to-irregular nuclear outline and distinct pale cytoplasm intermixed with small mature round lymphocytes. The chromatin was slightly paler and less clumped than in small mature lymphocytes. A small inconspicuous nucleolus was seen in most of the cells. Flow cytometry immunophenotyping performed on the FNA biopsy material showed a monoclonal population of B cells with kappa light chain restriction. The cytomorphology coupled with the immunophenotyping study in this clinical context suggested the diagnosis of low-grade B-cell lymphoma of mucosa-associated lymphoid tissue (MALT). Extensive staging work-up revealed no evidence of disseminated disease. The right parotid gland was surgically excised. Histology and gene rearrangement studies confirmed the cytologic diagnosis. To our knowledge, this is the first description of a low-grade lymphoma of MALT in a salivary gland to be diagnosed by FNA.

    View details for Web of Science ID A1997WW89600008

    View details for PubMedID 9143829

  • Bacillary angiomatosis of the cervix and vulva in a patient with aids OBSTETRICS AND GYNECOLOGY Long, S. R., Whitfeld, M. J., EADES, C., Koehler, J. E., Korn, A. P., Zaloudek, C. J. 1996; 88 (4): 709-711


    Bacillary angiomatosis is a clinicopathologic entity that most often is identified in the skin of patients with AIDS. This report presents an example of bacillary angiomatosis of the female genital tract.Bacillary angiomatosis presented as red-purple nodules of the vulva and cervix in a 32-year-old woman with AIDS. Histologic examination revealed the lobular epithelioid vascular proliferation and hazy clumps of bacteria that characterize bacillary angiomatosis. The diagnosis was confirmed on Warthin-Starry-stained issue and by blood cultures, which were positive for Bartonella (Rochalimaea) henselae.Accurate diagnosis of this infection is important because 1) bacillary angiomatosis is commonly mistaken for Kaposi sarcoma, 2) it is effectively treated with inexpensive antibiotics, and 3) undiagnosed and/or untreated bacillary angiomatosis may lead to overwhelming disseminated infection and death.

    View details for Web of Science ID A1996VL28100027

    View details for PubMedID 8841262

  • Classics in cytology .7. Kun, Lebert, and early efforts at fine-needle aspiration biopsy DIAGNOSTIC CYTOPATHOLOGY Long, S. R., Cohen, M. B. 1996; 14 (2): 182-183

    View details for Web of Science ID A1996UC85100017

    View details for PubMedID 8964178

  • THE INCIDENCE AND SPECTRUM OF NEUROLOGICAL INJURY AFTER OPEN FETAL SURGERY JOURNAL OF PEDIATRIC SURGERY Bealer, J. F., Raisanen, J., Skarsgard, E. D., Long, S. R., Wong, K., Filly, R. A., Adzick, N. S., Harrison, M. R. 1995; 30 (8): 1150-1154


    A preterm infant's immature brain is susceptible to both anoxic and hemorrhagic injury during periods of physiological stress. The advent of in utero surgery has created a new population of premature patients at risk for central nervous system (CNS) injury. The aim of this study was to evaluate the frequency and nature of CNS injuries in fetal surgical patients. Of 33 fetuses with known neurological outcome after fetal surgery, CNS injuries were identified in seven (21%). Of the seven, four had significant episodes of fetal bradycardia (3) or neonatal hypotension (1), which suggests that asphyxia contributed to the neurological injury. The CNS injuries in the other three patients occurred unexpectedly and without associated signs of fetal distress. The authors speculate that these injuries may have been caused by sudden fluxes in cerebral blood flow, induced by maternal hypoxia (1) or by maternally administered tocolytic drugs (2) used to treat postoperative preterm labor.

    View details for Web of Science ID A1995RQ71300010

    View details for PubMedID 7472970


    View details for Web of Science ID A1993MD83100023

    View details for PubMedID 8287774


    View details for Web of Science ID A1992HQ55900008

    View details for PubMedID 1568411

  • CLASSICS IN CYTOLOGY .4. TRAUT AND THE PAP SMEAR ACTA CYTOLOGICA Long, S. R., Cohen, M. B. 1991; 35 (1): 140-142

    View details for Web of Science ID A1991EX43200026

    View details for PubMedID 1994623

Footer Links:

Stanford Medicine Resources: