Linear scleroderma "en coup de sabre" (LSCS) is a subtype of localized scleroderma (Tab. 1). LSCS, usually developing in the first or second decade of life, presents as band-like sclerotic lesions with more or less marked skin discoloration of the frontoparietal area. Characteristically, LSCS manifests unilaterally and does not extend below the eyebrow. The active stage usually lasts two to five years. Involutionary atrophy of skin, muscle, and even bone may occur. Neurological and ophthalmological abnormalities are not infrequent in LSCS 123. We present an uncommon case of bilateral LSCS with facial atrophy and several neurological complications.

A 23-year-old woman presented with band-like sclerotic lesions and cicatricial alopecia on the left frontoparietal area (upper trigeminal dermatome). In this area, there was remarkable atrophy of skin and underlying tissues. She had complete ptosis of the left eye. Veins was clearly seen through the atrophic skin in the left temporal region. There was also a remarkable subcutaneous cleft above the right eyebrow and a nearly complete loss of the left eyebrow (Figs 1,2,3,4,5). The tongue or gums were not involved. The patient refused a skin biopsy from the frontal area. Onset of the disease was reported to have been at age 7, with a small scleroderma-like lesion on the left forehead. The lesion was asymptomatic and not preceded by trauma. Over the succeeding years, the sclerotic changes and atrophy gradually spread over the almost complete left frontoparietal area. The lesions did not respond to various treatment protocols including penicillin G and topical hydrocortisone. At the age of 16, a transcranial orbitotomy and frontal advancement was performed on the left side of the face. Because of her history of two grand-mal seizures, which had occurred during the last two years, she had anticonvulsant therapy with carbamazepine 600 mg daily. There was no family history for scleroderma or hemiatrophies.

Neurological examination showed peripheral facial nerve palsy on the left side. Complete oculomotor nerve palsy of the left eye was confirmed by ophthalmological investigation. Laboratory investigations, including antinuclear antibodies and serology for B. burgdorferi, electrocardiography, abdominal sonography, and chest X-ray, did not yield abnormalities. Cranial magnetic resonance imaging (sagittal T1, axial T2, FLAIR before and after contrast medium injection) showed no pathological intracranial findings. Since the patient was intended for bony reconstruction surgery, 3-dimensional reconstruction images were performed using a spiral computed tomography scanner (Somatom Plus S, Siemens, Iselin, USA). Contiguous 2 mm axial slices of the facial skull were taken at 2 mm intervals. Oblique coronal, oblique sagittal, and 3-dimensional images were subsequently reconstructed from the data. Hypoplasia of facial bones on the left side were demostrated, in particular involvement of the frontal bone, orbital floor, and maxillary sinus (Fig. 6).

In the present case, band-like scleroderma and facial atrophy of the frontoparietal area was observed. The skin involvement did not extend below the forehead. These features were consistent with a diagnosis of LSCS with facial atrophy 123. In classic progressive facial hemiatrophy or Parry-Romberg syndrome (PRS), cutaneous inflammation, induration, and adhesion are absent or minimal, and atrophy usually involves the one entire side of the face 456. It has been suggested that the term PRS should only be used for progressive hemifacial atrophy occurring without features of scleroderma 2. However, a clear differentiation between PRS and involutionary LSCS is often not possible, and it is rather an arbitrary approach to differentiate the two diseases because of their extend on the face and more or less sclerosis, despite of all their common features observed. Although preceding sclerosis was never noticed in many cases of PRS, Jablonska and Blaszczyk 1 observed several patients with typical LSCS in children converting within several years into facial hemiatrophy. Thus the time of investigation is of significance when diagnosing either LSCS or PRS. There are no reliable histological criteria to differentiate PRS from involutionary scleroderma. Recently, Blaszczyk et al. 7 reported three cases of primary atrophic profound linear scleroderma with involvement of the subcutis and deeper tissues. In accordance with a previous report of Malandrini et al. 8, deep skin biopsies showed inflammatory infiltrates in the endomysium and perimysium. Interestingly, atrophy was not preceded by clinical evidence of inflammation, discoloration of the skin, or sclerosis. Blaszczyk et al. 7 concluded that PRS could be regarded as a variety of deep linear scleroderma 79.

Common theories on the etiology of LSCS are: firstly, that the localized forms of scleroderma are related in the same manner as discoid and systemic lupus erythematosus and thus belonging in the collagen-vascular group of diseases with autoimmune phenomena or secondly, that localized scleroderma is a developmental disease, occasionally associated with other (predetermined) defects 2. Other theories implicate that viral or bacterial infections (e.g. B. burgdorferi) and genetic factors may play a role in the etiology of LSCS 1. However, a multifactorial pathogenesis of hemiatrophies is most likely. Ophthalmological (e.g. iridocyclitis, enophthalmus, exophthalmus) and/or neurological (e.g. intracerebral calcification, hemiplegic headaches, epileptic seizures) manifestations have frequently been observed in patients with LSCS and PRS 2341011. Besides, non-neurogenic myopathy associated with LSCS has previously been reported 1112. However, cranial nerve palsy coexisting with LSCS or PRS is a rarity. The involved areas in LSCS do usually not cross the midline and may resemble innervated fields in a cranial nerve distribution, in particular the upper trigeminal dermatome, raising the possibility of a neurogenic origin. It has therefore been suggested that LSCS and PRS result from hyper- or hypoactivity of sympathetic nervous system or abnormality of the trigeminal nerve. Pathological evidence of intracerebral inflammation in a patient with LSCS has recently been observed by Stone et al. 13. Accordingly, we suggest that computed tomography and magnetic resonance imaging are useful diagnostic tools for the investigation of patients with LSCS, in particular for detecting clinically inapparent intracranial changes 1314. In the present case, cutaneous atrophy involved both frontal sites. Bilateral lesions of LSCS have been considered to be extremely rare 15. Lateralization of LSCS possibly indicates a neuropathological etiology of the disease. Notably, there were no preceding clinical features of scleroderma in the atrophic area affecting the right forehead of our patient indicating that the atrophic cleft on the right forehead was caused by profound linear scleroderma 7.

The management of localized scleroderma is still unsatisfactory. Various therapeutic modalities (e.g. topical and pharmacological agents, immunosuppresion, physiotherapy, and phototherapy) have been suggested 16. In an uncontrolled study, we have recently observed that childhood scleroderma can successfully be treated with topical calcipotriol and low-dose UVA1 phototherapy 17. However, management of facial atrophy is a challenge. As shown in the presented case, palliative reconstruction surgery is potentially beneficial for patients with disfiguring facial atrophy, and the employment of 3-dimensional reconstuction imaging may be helpful in preoperative scheduling of bony reconstruction surgery 18.

LSCS : linear scleroderma "en coup de sabre";

PRS : Parry-Romberg syndrome

None declared