A Diagnosis That Barely Shows Up in the Record

A dermatology journal recently flagged a forthcoming study cataloguing more than a century of U.S. court cases touching psychodermatology, the field that treats skin symptoms and psychiatric conditions as inseparable. The study itself was not yet readable in full, so before repeating its premise, we went to the raw material any researcher starts from: the opinions courts actually publish.

Delusional parasitosis is the clinical term for a fixed, false belief that one is infested by parasites or insects despite examination finding nothing. It is a recognized diagnosis, not a fringe theory, and it typically surfaces first in a dermatologist's office, because the person is there for skin damage from scratching, not for a psychiatric complaint.

Two results in the whole archive

We searched CourtListener, the free case-law database run by the nonprofit Free Law Project, for the exact phrase "delusional parasitosis" among published opinions. That search returned exactly two results in the entire archive: an Alabama workers' compensation case decided in 2017, and a Maryland murder appeal decided in 2020. That is a narrow slice of one free database, using one search term, covering only published opinions; it says nothing about unpublished trial records or settlements. But it is a real, checkable count, and it says something worth sitting with: even a diagnosis dermatologists consider well established almost never becomes the fact a published opinion turns on.

In Bailey v. Jacksonville Health & Rehabilitation Center, 249 So. 3d 499 (Ala. Civ. App. 2017), a certified nursing assistant sued her employer for workers' compensation benefits, arguing that scabies she contracted on the job left her with a lasting, false belief she was still infested. The court did not decide whether delusional parasitosis is real or common. It decided that a jury, not a judge on summary judgment, needed to weigh whether her workplace exposure caused it.

In Ronnie Lee Rainey, Sr. v. State of Maryland, 246 Md. App. 160 (2020), the diagnosis appears for a single paragraph inside a far larger case: an appeal of a jury's finding that a man was criminally responsible for killing his wife and stepdaughter. The state's psychiatric expert dismissed his reported symptoms of delusional parasitosis as "inconsistent" with confirmed cases she had seen across two decades of forensic work. The real question on appeal, the one the court spent most of its opinion resolving, was a Sixth Amendment dispute over whether one expert may testify about test results a different expert generated.

The court found that admitting that testimony had been an error, but ruled the error harmless, and let the jury's finding stand.

What the thinness actually shows

Neither case builds a special legal category for a psychodermatologic diagnosis. Courts fold these claims into doctrines already on hand: causation rules in workers' compensation, evidentiary rules in criminal appeals. That is a modest finding, but an honest one. It does not tell us how often these diagnoses surface in records this search cannot reach. It only tells us how rarely the term reaches the kind of opinion that becomes precedent.

For anyone whose own skin-and-mind symptoms make a courtroom feel like a live possibility, these two cases suggest a narrower, more useful question for a professional conversation: not whether this could become a legal case, but who besides a dermatologist should be part of evaluating it. In both cases here, a psychiatric expert's testimony, not a dermatologist's, carried the diagnosis into the legal record.

Sources: Maryland Courts · CourtListener