Augmented interferon I signaling in a patient with COVID toes
Bibliographic record
Abstract
Dermatological manifestation in Coronavirus Disease 2019 (COVID-19) can occur either as a direct implication of COVID-19 or due to other incidental skin changes during COVID-19 infection. Since the detail of each subtype has not been fully described, careful evaluation will be needed. A 49-year-old man presented with a 7-days history of violaceous, infiltrated plaques on the distal site of extremities with a 4-day history of acute fever and headache at July 2020. The skin lesion was not accompanied by purpura, ulcer, target lesion, but with pain and burning sensation (Figure 1). The patient had experienced herpes simplex on the lips several times before, however, did not have any other disease/medication/family history. Complete skin and mucosal examination results were otherwise unremarkable. Blood cell counts were normal in white blood cells (7620/µL), and thrombocytes (148,000/µL) with elevated atypical lymphocyte count up to 980/µL and elevated eosinophil count (460/µL), and decreased lymphocyte count to 530/µL. General biochemistry was normal except for high aspartate trans aminase (38 U/L), alanine transaminase (80 U/L), lactic acid dehydrogenase (446 U/L; normal < 221) and C-reactive protein (1.65 mg/dL). Although polymerase chain reaction (PCR) test result for COVID-19 on a nasopharyngeal swab was negative, serum IgM antibody against SARS-CoV-2 was turned positive from day 25 to 45 (by antibody test kit: Artron Laboratories, Burnaby, BC, Canada). Antibody test of other viruses, including cytomegalovirus, Epstein–Barr virus, herpes simplex virus, rubeola virus, rubella virus, human herpes virus-6, or influenza virus showed negative or inactive. Autoantibodies, including antinuclear antibody and antimelanoma differentiation antigen five antibody were negative. Computerized tomography revealed no complications in the lung. Histopathological findings of the skin biopsy taken from the dorsal site of the right foot at day 2 showed spongiosis and enhanced edema in epidermis, with mononuclear cell infiltration to epidermis, dermal vessels, and appendix (Figure 1d). The expression of myxovirus resistance protein 1 (MxA, a type 1 interferon-inducible protein) was significantly up-regulated in epidermis, dermal vascular lesions, and appendix (detected by specific antibody, ss-166412: Santa Cruz, Dallas, TX, USA: Figure 1e).1, 2 The patient was treated by initial 30 mg/day prednisolone (started from day 4, reduced the dose 10 mg/day every week). The symptoms and signs disappeared with pigmentation and membrane-like desquamation after two weeks (Figure 1f). The relationship between this acral lesion and SARS-CoV-2 is controversial, mainly because there is a minority of patients with COVID toes who are positive (only 13 patients out of 88) for PCR tests.3 The current patient showed positive IgM antibody against SARS-CoV-2, although SARS-CoV-2 IgG antibody had been negative. This did not indicate that IgM SARS-CoV-2 was false positive, since the system uses the same antigen for both IgM and IgG in the same strip. The patient did not switch the antibody class to IgG. Monogenic autoinflammatory interferonopathy, Aicardi-Goutières syndrome, appears similar to toe lesions of the current case. The expression of MxA was up-regulated in this case. Therefore, local interferon induced by COVID19 may cause the erythema. Taken together, toe lesions of COVID-19 could be one of the valuable indicators for COVID-19, although further studies are needed. None declared.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".