Affordable Access

Publisher Website

Mid-borderline leprosy

Indian Dermatology Online Journal
Medknow Publications
Publication Date
DOI: 10.4103/2229-5178.110647
  • Through The Lens
  • Biology
  • Medicine


A 43-year-old male presented with asymptomatic cutaneous lesions chiefly involving the face, trunk, forearms and legs for the past six months. As the older lesions gradually enlarged, new lesions appeared. Examination revealed multiple asymmetrically distributed, annular, erythematous, indurated plaques with sharply punched out inner margins with normal skin in the centre and sloping outer margins. Irregular lesions were also seen. The right greater auricular and bilateral ulnar nerves were thickened and non-tender. Altered tactile sensations were demonstrable over the lesions on the extremities, but no motor loss was observed. Skin smears from the ear lobe and from an indurated plaque was positive for M.leprae. Based on the characteristic morphology of the lesions and other clinical findings, a diagnosis of mid-borderline or borderline-borderline (BB) leprosy was made. It appeared to be a case downgrading borderline leprosy and the patient was treated with standard MB MDT, to which he responded well. BB leprosy is the immunologic midpoint in the fascinating clinical spectrum of the granulomatous disease. It is the most unstable and uncommon form.[1] These patients upgrade or downgrade to a more stable clinical form at the earliest. Cutaneous lesions are characteristically annular plaques with sharp interior and exterior borders [Figures 1 and 2].[2] Large plaques with islands of clinically normal skin within the plaques give rise to a “Swiss cheese” appearance.[2] Lesions are numerous but are asymmetrical. Determining the type of leprosy is not based on clinical features alone. It involves the histological, bacteriological and immunological facets too, and these objectives seemed to have been met with in Ridley-Jopling classification.[3] Consistency among clinical, histological, bacteriological and immunological parameters is perhaps less than 50%.[3] Hence, identifying characteristic cutaneous lesions is useful for the classification of leprosy. Figure 1 Annular plaque with sh

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times