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Observation Letter
87 (
2
); 252-254
doi:
10.25259/IJDVL_234_20
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Scrotal plaques as a predominant presentation in a case of secondary syphilis

Department of Dermatology, Venereology and Leprology, AIIMS, Jodhpur, Rajasthan, India
Corresponding author: Dr. Anupama Bains, Department of Dermatology, AIIMS, First Floor, OPD Building, Basni Phase 2, Jodhpur, Rajasthan, India. whiteangel2387@gmail.com
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This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-Share Alike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.

How to cite this article: Bains A, Tyagi N. Scrotal plaques as a predominant presentation in a case of secondary syphilis. Indian J Dermatol Venereol Leprol 2021;87:252-4.

Sir,

A 28-year-old male presented to the dermatology out-patient department with a 20-day history of multiple, mildly pruritic, erythematous lesions over the scrotum. There was a history of unprotected sexual exposure with a commercial sex worker in the 3 months back. General physical examination and systemic examination revealed no significant abnormalities. Cutaneous examination showed multiple, erythematous, flat-topped, round to oval, firm, non-tender plaques distributed over the scrotum [Figure 1a]. A few pigmented macules were seen over the soles [Figure 1b]. Mucosal examination revealed no abnormal findings. A skin biopsy specimen from a lesion over the scrotum revealed perivascular lymphohistiocytic inflammation admixed with numerous plasma cells [Figure 2a and b]. A serology test revealed a reactive Venereal Disease Research Laboratory test with a titer of 1:32 and a positive Treponema pallidum hemagglutinin assay. Patient was treated with benzathine penicillin 2.4 million units IM which led to complete resolution of lesions at 4 weeks [Figure 2c].

Figure 1a:: Multiple erythematous, flat-topped, round to oval plaques over the scrotum
Figure 1b:: A few pigmented macules over instep of soles
Figure 2a:: Histopathology shows acanthosis along with perivascular chronic mononuclear inflammatory cells. (H&E, 4×)
Figure 2b:: Higher magnification shows loose collection of histiocytes admixed with plasma cells in the dermis (H&E, 40×)
Figure 2c:: Resolution of scrotal lesions after treatment

Secondary syphilis is often called the “great imitator” as it can have a variety of clinical presentations. Lichenoid plaques on the scrotum and scrotal dermatitis have been rarely described in literature.1-6 This case was interesting as he had no generalized rash, mucosal lesions or other systemic manifestations of secondary syphilis. Cases described with scrotal lesions had predominantly lichenoid morphology along with the presence of other features of secondary syphilis.1,5 A few patients had erythematous scaly plaques which were confused with eczema. Onset of the scrotal lesions preceded condyloma lata by several months in another patient.3 In our case too, the scrotal lesions were the chief complaints and could be an early manifestation of secondary syphilis. However, further studies are required to conclude this finding. A few slightly pigmented asymptomatic macules over the palms and soles may remain unnoticed by the patient, especially in Indian skin. Hence, syphilis should be considered as an important differential diagnosis in patients presenting with scrotal lesions alone as it can mimic other dermatoses like lichen planus, psoriasis and eczema.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

References

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  6. , , , . Lichenoid skin lesions: A rare manifestation in secondary syphilis. Indian J Dermatol Venereol Leprol. 2020;86:105.
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