Bio

Bio


Daniel Mason MD is a Clinical Assistant Professor of Psychiatry. He attended medical school at UCSF and completed his residency at Stanford. He is currently an inpatient attending at Stanford University Hospital.

Clinical Focus


  • Psychiatry

Academic Appointments


  • Clinical Assistant Professor, Psychiatry and Behavioral Sciences

Professional Education


  • Medical Education:University of California at San Francisco School of Medicine (2004) CA
  • Board Certification: Psychiatry, American Board of Psychiatry and Neurology (2015)
  • Residency:Stanford University Hospital and Clinics (2015) CA

Teaching

2017-18 Courses


Publications

All Publications


  • 'A more perfect arrangement of plants': the botanical model in psychiatric nosology, 1676 to the present day. History of psychiatry Mason, D., Hsin, H. 2018: 957154X18757341

    Abstract

    Psychiatric classification remains a complex endeavour; since the Enlightenment, nosologists have made use of various models and metaphors to describe their systems. Here we present the most common model, botanical taxonomy, and trace its history from the nosologies of Sydenham, Sauvages and Linnaeus; to evolutionary models; to the later contributions of Hughlings-Jackson, Kraepelin and Jaspers. Over time, there has been a shift from explicit attempts to pattern disease classification on botanical systems, to a more metaphorical use. We find that changes in the understanding of plants and plant relationships parallel changes in the conceptualization of mental illness. Not only have scientific discoveries influenced the use of metaphor, but the language of metaphor has also both illuminated and constrained psychiatric nosology.

    View details for DOI 10.1177/0957154X18757341

    View details for PubMedID 29480060

  • "The Rack of His Imagination": Literature and the Psychotic Experience. Academic psychiatry : the journal of the American Association of Directors of Psychiatric Residency Training and the Association for Academic Psychiatry Mason, D. P. 2017; 41 (6): 711–14

    View details for DOI 10.1007/s40596-017-0807-0

    View details for PubMedID 29127667

  • Verbigeration: An overlooked symptom of a "forgotten syndrome"? Bipolar disorders Mason, D. P., Tan, M., Lee, J., Wolstencroft, P., Sanborn, K., Ballon, J. S. 2017; 19 (8): 710–12

    View details for DOI 10.1111/bdi.12574

    View details for PubMedID 29268005

  • 'I am the man that mirthless lives' - psychiatry in literature. British journal of psychiatry Mason, D. P. 2016; 208 (4): 365-?

    View details for DOI 10.1192/bjp.bp.115.173303

    View details for PubMedID 27036699

  • Rogue Wounds Lapham's Quarterly Mason, D. P. 2015
  • Tom of Bedlam. American journal of psychiatry Mason, D. P. 2014; 171 (12): 1257-1258

    View details for DOI 10.1176/appi.ajp.2014.14091149

    View details for PubMedID 25756768

  • Healing Spirits Lapham's Quarterly Mason, D. P. 2012
  • Balanced Diets Lapham's Quarterly Mason, D. P. 2011
  • City of Seeds Lapham's Quarterly Mason, D. P. 2010
  • Unusual Plasmodium malariae-like parasites in southeast Asia JOURNAL OF PARASITOLOGY Kawamoto, F., Win, T. T., Mizuno, S., Lin, K., Kyaw, O., Tantular, I. S., Mason, D. P., Kimura, M., Wongsrichanalai, C. 2002; 88 (2): 350-357

    Abstract

    During malaria surveys in Myanmar, 2 peculiar forms of Plasmodium malariae-like parasites were found. The morphologies of their early trophozoite stages were distinct from that of the typical P. malariae, resembling instead that of Plasmodium vivax, var. minuta, reported by Emin, and Plasmodium tenue, reported by Stephens, both in 1914. Two polymerase chain reaction (PCR)-based diagnoses, which target the same regions in the small subunit ribosomal RNA (SSUrRNA) genes, indicated that these parasites were new variant forms of P. malariae and that they could be separated into 2 genetic types that correlated with the 2 morphological types. Sequence analysis of the SSUrRNA and the circumsporozoite protein genes revealed that they were distinct both from each other and from other known P. malariae isolates and that the P. tenue-like type was closer to a monkey quartan malaria parasite, Plasmodium brasilianum. These results illustrate that the microscopic appearance of human P. malariae parasites may be more varied than previously assumed and suggest the value of molecular tools in the evaluation of malaria morphological variants.

    View details for Web of Science ID 000175294300024

    View details for PubMedID 12054010

  • A comparison of two rapid field immunochromatographic tests to expert microscopy in the diagnosis of malaria ACTA TROPICA Mason, D. P., Kawamoto, F., Lin, K., Laoboonchai, A., Wongsrichanalai, C. 2002; 82 (1): 51-59

    Abstract

    In Myanmar, we tested two rapid malaria immunochromatographic kits: the OptiMAL assay for the detection of parasite lactate dehydrogenase (pLDH), and the ICT Malaria P.f./P.v. test for histidine-rich protein 2 (PfHRP2) and panmalarial antigens. A total of 229 patients were examined, of whom 133 were found to be malaria positive by Giemsa microscopy. Both OptiMAL and ICT gave lower sensitivities than previously reported. ICT sensitivity for Plasmodium falciparum and non-falciparum parasites were 86.2 and 2.9%, respectively; specificity was 76.9 and 100%, respectively. OptiMAL sensitivity for P. falciparum and non-falciparum parasites were 42.6 and 47.1%, respectively; specificity was 97.0 and 96.9%, respectively. The sensitivity of both tests for the detection of both P. falciparum and non-falciparum parasites increased with parasite density. Several explanations for these results are explored. Our results raise particular concern over batch quality variations of malaria rapid diagnostic devices (MRDDs).

    View details for Web of Science ID 000175126200007

    View details for PubMedID 11904103

  • Malaria in southern Thailand: relationship between parasitaemia and disease TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE Mason, D. P., Pattarapotikul, J., Chindanond, D., Supavej, S., Wongcharoenyong, S., Naing, Lwin, T., Silachamroon, U., Looareesuwan, S. 2001; 95 (4): 418-419

    View details for Web of Science ID 000171336900018

    View details for PubMedID 11579887

  • The panmalarial antigen detected by the ICT malaria P.f./P.v. immunochromatographic test is expressed by Plasmodium malariae JOURNAL OF CLINICAL MICROBIOLOGY Mason, D. P., Wongsrichanalai, C., Lin, K., Miller, R. S., Kawamota, F. 2001; 39 (5): 2035-2035

    View details for Web of Science ID 000168527900072

    View details for PubMedID 11388168

  • Can treatment of P. vivax lead to a unexpected appearance of falciparum malaria? Southeast Asian journal of tropical medicine and public health Mason, D. P., Krudsood, S., Wilairatana, P., Viriyavejakul, P., Silachamroon, U., Chokejindachai, W., Singhasivanon, P., Supavej, S., McKenzie, F. E., Looareesuwan, S. 2001; 32 (1): 57-63

    Abstract

    Of 994 patients admitted to the Bangkok Hospital for Tropical Diseases for P. vivax malaria, 104 (10.5%) experienced appearance of Plasmodiumfalciparum following drug treatment for P. vivax . In all patients, P. falciparum parasites were not found by microscopic examination upon admission. The mean time for P. falciparum appearance was 12.6 days after the commencement of chloroquine treatment. Patients experiencing appearance of P. falciparum had significantly lower hematocrit, and greater initial P. vivax parasite counts. We use a mathematical model to explore the consequences of chloroquine treatment of such mixed infections. Both clinical results and features of the model suggest that such "hidden infections" may be quite common, and that the appearance of P. falciparum may be stimulated by treatment of P. vivax.

    View details for PubMedID 11485096

  • Review and recent progress: the mathematical modeling of mixed species Plasmodium infections. Southeast Asian journal of tropical medicine and public health Mason, D. P. 2000; 31: 69-74

    Abstract

    Mathematical modeling serves numerous uses in biology, notably in the exploration of phenomena that are difficult to observe empirically. Here, I review recent progress in modeling the blood-stage dynamics of mixed-species Plasmodium infections, namely P. malariae-P. falciparum and P. vivax- P. falciparum mixed infections. Modeling reproduces features of such infections found in nature including the asymmetry of parasite blood-stage densities, inter-specific suppression, and parasite asexual-form recrudescence following long-standing sub-patency. Several findings which merit clinical attention are presented: the ability of P. malariae and P. vivax to reduce the peak parasitemia of co-infecting P. falciparum, and the potential recrudescence of a low-level P. falciparum infection following a P. malariae infection or P. vivax infection or relapse. The action of antimalarial drugs is discussed, highlighting some potential complications in treating mixed-species malaria infections. Most notably, if a mixed-species infection is misdiagnosed as a single-species P. vivax infection, treatment can lead to the dangerous appearance of "hidden" P. falciparum.

    View details for PubMedID 11414463

  • Hidden Plasmodium falciparum infections. Southeast Asian journal of tropical medicine and public health Krudsood, S., Wilairatana, P., Mason, D. P., Treeprasertsuk, S., Singhasivanon, P., Looareesuwan, S. 1999; 30 (4): 623-624

    Abstract

    Mixed infection of P. vivax and P. falciparum malaria frequently recorded in field survey. However mixed infection was frequently misdiagnosed as single infection due to low parasite density, difficult species identification and procedure error of microscopic examination. Our previous report showed high rates (32-33%) of P vivax infection following treatment of previously assumed to be only P. falciparum infection. In a study of 992 patients with initial presentation with P. falciparum, we found that 104 (10.5%) of patients had P. falciparum appearing during 28 days in the hospital (ranged 1-28 days) following chloroquine treatment for P. vivax. The potential for P. falciparum appearing following elimination of P. vivax must be considered in malaria treatment.

    View details for PubMedID 10928350

  • Blood-stage dynamics and clinical implications of mixed Plasmodium vivax-Plasmodium falciparum infections AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE Mason, D. P., McKenzie, F. E. 1999; 61 (3): 367-374

    Abstract

    We present a mathematical model of the blood-stage dynamics of mixed Plasmodium vivax-Plasmodium falciparum malaria infections in humans. The model reproduces features of such infections found in nature and suggests several phenomena that may merit clinical attention, including the potential recrudescence of a long-standing, low-level P. falciparum infection following a P. vivax infection or relapse and the capacity of an existing P. vivax infection to reduce the peak parasitemia of a P. falciparum superinfection. We simulate the administration of antimalarial drugs, and illustrate some potential complications in treating mixed-species malaria infections. Notably, our model indicates that when a mixed-species infection is misdiagnosed as a single-species P. vivax infection, treatment for P. vivax can lead to a surge in P. falciparum parasitemia.

    View details for Web of Science ID 000082697800004

    View details for PubMedID 10497972

  • The blood-stage dynamics of mixed Plasmodium malariae-Plasmodium falciparum infections JOURNAL OF THEORETICAL BIOLOGY Mason, D. P., McKenzie, F. E., Bossert, W. H. 1999; 198 (4): 549-566

    Abstract

    We present the first mathematical model of the within-host dynamics of a mixed-species malaria infection in a human: the blood-stage population dynamics of a dual infection with Plasmodium malariae and Plasmodium falciparum. Our results reproduce several important features of such infections in nature, including the asymmetry of species asexual-form densities, inter-specific suppression through interactions with the human immune system, and seasonal alternations in species prevalence. Most importantly, our results suggest that an existing P. malariae infection can reduce the peak parasitemia of a subsequent P. falciparum superinfection by as much as 50%. This result integrates numerous empirical observations and supports the hypothesis that clinical outcomes of P. falciparum infections may be influenced by the presence of a congener.

    View details for Web of Science ID 000081222700006

    View details for PubMedID 10373354