Round Bodies Detected by Treponema pallidum Immunohistochemical Stain in Two Cases of Cutaneous Syphilitic Gummata

ABSTRACT

Tertiary syphilis may present a diagnostic challenge due to negative nontreponemal serologies in up to 30% of cases and frequent lack of identifiable spirochetes on histopathology or other direct detection tests. We report 2 cases of round bodies staining with Treponema pallidum immunohistochemistry by light microscopy in biopsies from cutaneous syphilitic gummata. In 1 case, the finding was validated 3 times by 2 independent laboratories; in the other case, T. pallidum was detected by polymerase chain reaction in the biopsy sample. Spirochete round bodies have previously been reported in the setting of electron microscopy and fluorography, but to the best of our knowledge, have not been reported by light microscopy in a routine skin biopsy. Although the clinical implications are unclear, this may represent a helpful new paradigm for the diagnosis of tertiary syphilis.

Umbilical condyloma lata

Condyloma lata, a cutaneous manifestation of secondary syphilis, usually appear as verrucous papules and plaques in the anogenital area. Involvement of the umbilicus is very uncommon. Thus, awareness of this presentation, along with appropriate history, physical exam, and laboratory testing may aid clinicians in prompt and accurate diagnosis. We describe a patient with an unusual presentation of condyloma lata on the umbilicus.

Recalcitrant genital papules

This patient was initially told he had genital warts, but the appearance of the lesions, and the presence of a rash on his trunk and extremities, suggested another diagnosis.

Malignant syphilis: ostraceous, ulceronecrotic lesions in a patient with human immunodeficiency virus

We present a 36-year-old HIV-positive man with a sixweek history of spreading, ulcerative, and necroticcutaneous lesions. Laboratory and histopathologicexamination revealed syphilis. This case of malignantsyphilis, also known as lues maligna, is an uncommonvariant of this sexually transmitted infection. This casehighlights the importance of including malignantsyphilis in the differential diagnosis of patientspresenting with a disseminated ulcerative andnecrotic rash, especially in individuals with HIV.

Histologic features of secondary syphilis: A multicenter retrospective review

BACKGROUND

Secondary syphilis has a wide spectrum of clinical and histologic manifestations.

OBJECTIVE

We sought to determine the frequency of histopathological features characterizing secondary syphilis, and which are most common in specimens displaying few diagnostic findings.

METHODS

In a multicenter, retrospective analysis of biopsy-proven secondary syphilis, cases were subcategorized by the number of histologic characteristics present.

RESULTS

The 106 cases mostly had 5 to 7 of the features studied. Many features were scarcer in cases with 5 or fewer features, including endothelial swelling (87.7% overall vs 72.4% ≤5 features), plasma cells (69.8% vs 48.3%), and elongated rete ridges (75.5% vs 27.6%). Specimens with 5 or fewer features were more likely to be truncal (61.1% vs 34.4% overall), demonstrate rete ridge effacement (44.8% vs 19.8%), and have pityriasis rosea (33.3% vs 17.2%) or drug eruption (33.3% vs 10.9%) in the clinical differential. An interstitial inflammatory pattern was the most common characteristic of specimens with 5 or fewer features (75.9%).

LIMITATIONS

This was a retrospective review.

CONCLUSION

The independent value of many histologic features of syphilis may be overestimated. Combinations of endothelial swelling, interstitial inflammation, irregular acanthosis, and elongated rete ridges should raise the possibility of syphilis, along with the presence of vacuolar interface dermatitis with a lymphocyte in nearly every vacuole and lymphocytes with visible cytoplasm.

Don't forget about syphilis

Syphilis has extremely variable manifestations that produce an extremely broad differential diagnosis. Care must be taken to consider syphilis in dermatologic and other systemic disorders as is relevant.

Lues Maligna in a Chronic Alcoholic Patient

Lues maligna, which is characterized by noduloulcerative lesions, is a rare form of secondary syphilis. It is mainly seen in either HIV-infected or malnourished patients suffering from a depression in immunity. We presented a chronic alcoholic, HIV negative male patient with noduloulcerative lesions diagnosed as lues maligna based on his skin eruptions, results of serologic tests, and, histopathologic findings. We believe that chronic alcoholism could be the cause of immunosuppression in our case and wanted to emphasize the possibility of an association between lues maligna and chronic alcoholism.

[Skin biopsy as a clue - case report]

Skin biopsy is one of the most important diagnostic tools in dermatologic disorders. It is, however, necessary to combine histological findings with the clinical picture, and diagnosis will not necessarily be reached even from a technically successful biopsy without proper referral data. We describe a case in which biopsies taken from the skin rash of a febrile middle-aged man led to the correct tracks and the syphilis diagnosis was reached in collaboration with the clinician.

[Laboratory diagnosis of Treponema pallidum infection in patients with early syphilis and neurosyphilis through a PCR-based test]

Syphilis is a sexually transmitted disease caused by Treponema pallidum. The diagnosis is based mainly in clinical presentation and non-specific assays. PCR-based diagnosis has been suggested as an attractive alternative method. The aim of this study was the validation of a PCR-based test for the diagnosis of early syphilis (ES) and neurosyphilis (NS). Clinical samples of mucocutaneous lesions and cerebrospinal fluid (CSF) specimens from patients previously diagnosed for ES and NS respectively using an enlarged gold standard, were tested by PCR. The reaction was done using primers targeting the tpN47 gene. Twenty out of 21 mucocutaneous samples from patients diagnosed with ES were positive by PCR, with a clinical sensitivity of 95%. Four out of 8 CSF samples from patients previously diagnosed with NS were positive by PCR, with a clinical sensitivity of 50%. The clinical specificity for both ES and NS was 100%. The PCR sensitivity and specificity for mucocutaneous samples allowed us to implement this assay in our laboratory for routine diagnosis. Although the sensitivity of the PCR in CSF was low, it may be useful to support clinical diagnosis.

Papulonodular secondary syphilis in a 52-year-old non-HIV heterosexual patient

There has been a recent increase in the incidence of syphilis in Slovenia, similar to other countries. Secondary syphilis can manifest with various clinical and histopathological presentations. We report the case of a 52-year-old patient that presented with nonpruritic nodular lesions on the face, trunk, and insteps that clinically mimicked lymphoma or sarcoidosis. Histopathological findings showed granulomatous inflammation. The serology revealed positive non-treponemal and treponemal tests. Treatment with benzathine penicillin G was successful.

Secondary syphilis in cali, Colombia: new concepts in disease pathogenesis

Venereal syphilis is a multi-stage, sexually transmitted disease caused by the spirochetal bacterium Treponema pallidum (Tp). Herein we describe a cohort of 57 patients (age 18-68 years) with secondary syphilis (SS) identified through a network of public sector primary health care providers in Cali, Colombia. To be eligible for participation, study subjects were required to have cutaneous lesions consistent with SS, a reactive Rapid Plasma Reagin test (RPR-titer > or = 1 : 4), and a confirmatory treponemal test (Fluorescent Treponemal Antibody Absorption test- FTA-ABS). Most subjects enrolled were women (64.9%), predominantly Afro-Colombian (38.6%) or mestizo (56.1%), and all were of low socio-economic status. Three (5.3%) subjects were newly diagnosed with HIV infection at study entry. The duration of signs and symptoms in most patients (53.6%) was less than 30 days; however, some patients reported being symptomatic for several months (range 5-240 days). The typical palmar and plantar exanthem of SS was the most common dermal manifestation (63%), followed by diffuse hypo- or hyperpigmented macules and papules on the trunk, abdomen and extremities. Three patients had patchy alopecia. Whole blood (WB) samples and punch biopsy material from a subset of SS patients were assayed for the presence of Tp DNA polymerase I gene (polA) target by real-time qualitative and quantitative PCR methods. Twelve (46%) of the 26 WB samples studied had quantifiable Tp DNA (ranging between 194.9 and 1954.2 Tp polA copies/ml blood) and seven (64%) were positive when WB DNA was extracted within 24 hours of collection. Tp DNA was also present in 8/12 (66%) skin biopsies available for testing. Strain typing analysis was attempted in all skin and WB samples with detectable Tp DNA. Using arp repeat size analysis and tpr RFLP patterns four different strain types were identified (14d, 16d, 13d and 22a). None of the WB samples had sufficient DNA for typing. The clinical and microbiologic observations presented herein, together with recent Cali syphilis seroprevalence data, provide additional evidence that venereal syphilis is highly endemic in this region of Colombia, thus underscoring the need for health care providers in the region to be acutely aware of the clinical manifestations of SS. This study also provides, for the first time, quantitative evidence that a significant proportion of untreated SS patients have substantial numbers of circulating spirochetes. How Tp is able to persist in the blood and skin of SS patients, despite the known presence of circulating treponemal opsonizing antibodies and the robust pro-inflammatory cellular immune responses characteristic of this stage of the disease, is not fully understood and requires further study.

Magnetic resonance imaging features of osseous manifestations of early acquired syphilis

We report the case of a 64-year-old man who initially presented with a maculopapular rash followed several weeks later by bilateral shin pain and infiltrative cutaneous lesions over the lower legs. The plain radiographs were not contributory, and the patient was referred for a whole-body bone scan, which demonstrated multifocal osseous lesions, including such lesions in the lower legs, skull and facial bones. Magnetic resonance imaging (MRI) demonstrated numerous small tibial and fibular nodular lesions involving the medullary cavity and the cortex. A diagnosis of acquired syphilis was made, based on skin biopsy. Results of serological testing were consistent with recent infection. The patient was treated with intramuscular injection of penicillin, and follow-up MRI demonstrated gradual resolution of the osseous lesions. Bone involvement is a relatively rare manifestation of early acquired syphilis. Although the plain radiographic features of the bony changes in acquired syphilis are well documented, there have been no reports of the magnetic resonance imaging findings in the appendicular skeleton.

Secondary syphilis with exclusive peno-scrotal localization

Syphilis is a sexually transmitted disease, caused by Treponema pallidum subspecies pallidum, its incidence, in the last decade, has significantly increased both in Western World and in developing countries. It represents a global health problem: it is estimated that each year the new cases of syphilis account for about 12 millions. The diagnosis is not always easy, especially in secondary syphilis in which the cutaneous manifestations are quite variable and should be considered in the differential diagnosis. A 26-year-old homosexual man had from some days papular lesions in the scrotum and penis. Four months before he had consulted a surgeon for the presence of an ulcerated nodular lesion in the perianal area, which advised to remove it in the suspicion of cancer. The patient declined surgery while observing in the following weeks a gradual and complete disappearance of the lesion. On the basis of clinical history, clinical features and laboratory results, a diagnosis of secondary syphilis with an exclusive peno-scrotal localization was made and systemic therapy with diaminocillin was started that led to complete resolution of skin lesions and to significant reduction of sierologic values.

Syphilis depicted by the Greek moulages: a picture of skin manifestations in former times

A great part of the medical wax moulages produced in the beginning of the last century depicts the various clinical signs of syphilis. Based on the study of a large Greek moulage collection, the different stages of syphilis are described. Moulages may still have the original scope as teaching objects, presenting clinical manifestations seldom seen to day and thus more likely of being overseen by the clinicians.

[Endemic treponematoses in Maputo, Mozambique]

Endemic treponematoses are present in inter-tropical countries in Africa, America, Indonesia and Papua New Guinea. Epidemiology and transmission of the disease are well known. After eradication in some countries after mass treatment in 1950-60, a resurgence of endemic treponematoses has been reported since 1980-90. We present 2 cases of endemic syphilis from the dermatology unit of the Maputo hospital, the first to be described in Mozambique. The endemic syphilis was probably facilitated by the social conditions induced by the Mozambican civil war between 1975 and 1993.

[Late secondary syphilis with ulceration of the tongue during HIV coinfection: case report]

With the continuing rise of syphilis incidence, late stages and atypical courses with HIV-coinfection can be expected. A 45 year old HIV infected male presented with an unusual manifestation of late secondary syphilis on the tongue, which was first diagnosed as a squamous cell carcinoma but cleared after therapy with penicillin. He also exhibited psoriasiform and annular lesions on the trunk and hyperkeratotic papules on the palms of the hand and soles of the feet. A TPHA test was negative due to a prozone phenomenon. With this case, we would like to emphasize the formerly well known relationship between the lesions of tertiary syphilis on the tongue and development of secondary carcinoma.

Syphilis mimicking Reiter's syndrome in an HIV-positive patient

A 38-year-old man with HIV infection presented with panuveitis, urethritis, and a papulosquamous eruption on his palms and soles. Careful physical and laboratory examination led to the diagnosis of syphilitic keratoderma, uveitis, and balanitis. The patient was successfully treated with penicillin and prednisone therapy. Because the initial presentation was difficult to distinguish from the symptoms of Reiter's syndrome, a high degree of clinical suspicion was required to accurately diagnose syphilis, a curable and potentially fatal disease.

Early congenital syphilis and erythema multiforme-like bullous targetoid lesions in a 1-day-old newborn: detection of Treponema pallidum genomic DNA from the targetoid plaque using nested polymerase chain reaction

A 1-day-old male newborn was born with respiratory distress, low birth weight, hepatosplenomegaly, and bullous targetoid skin lesions over the face, back, buttocks, and extremities. A diagnosis of early congenital syphilis was made based on a treponemal serologic test. Pathologic examination of the skin lesion showed scattered dyskeratotic cells in the epidermis and interface dermatitis consistent with erythema multiforme. No spirochete could be found in the skin sections staining with Warthin-Starry stain. Using nested polymerase chain reaction, treponemal genomic DNA fragments encoding DNA polymerase I were detected.

Late syphilis mimicking a pseudolymphoma of the skin

After a period of declining incidence of syphilis in most of Western Europe until the late 1990s, reports about an increasing trend have been published recently. In contrast to the rising incidence of early syphilis, cases of late (tertiary) syphilis are rarely seen in developed countries. In this report, we describe a 54-year-old patient with infiltrated erythematous plaques on his forehead and neck that histologically revealed a dense lymphocytic cell infiltrate with numerous plasma cells. The serologic examination was characteristic of syphilis and in conjunction with the clinical presentation and the patient's history led to the diagnosis of tertiary syphilis. The diagnosis of this late stage of syphilis can be difficult as clinical pictures can be misleading. Peculiar skin lesions should always remind clinicians of this infectious disease which has still to be considered in differential diagnoses in dermatology.

Secondary syphilis clinically mimicking pseudolymphoma of the face

Syphilis has been given titles such as the great imitator, the great mimic, and the great masquerader. It may lack pathognomonic signs and often presents similar to many other dermatological conditions. We present a case of a young woman who developed asymptomatic papulonodular lesions on the forehead; the lesions were clinically similar to pseudolymphoma but it was determined that she had secondary syphilis exhibiting prozone phenomenon. She also had alopecia of eyebrows. Both the alopecia as well as nodular lesions clinically resembling pseudolymphoma responded to and completely recovered with antisyphilitic treatment.