Perforating Granuloma Annulare Mimicking Papulonecrotic Tuberculid

Perforating granuloma annulare (PGA), a rare variant of granuloma annulare, is characterized by transepidermal elimination of altered collagen that clinically manifests an umbilicated papule with a central crust. It can be confused with papulonecrotic tuberculid (PNT) because of their similar appearance. Unlike PGA, PNT is usually related to tuberculosis infection with a typical histologic finding of wedge-shaped dermal necrosis. Here, we report the first Korean case of PGA mimicking PNT both clinically and histologically. A 43-year-old Korean woman presented with erythematous papules localized on the extensor surface of her limbs for one year. Some of these papules had a central umbilication or a crust. Regarding comorbidity, she had latent tuberculosis diagnosed with QuantiFERON®-TB Gold test about five months ago. She was on antituberculous medication. Initially, a diagnosis of papulonecrotic tuberculid accompanied by latent tuberculosis was considered. However, despite taking the antituberculous medication for five months, her skin lesions were not improved. Biopsy specimen from her arm lesion showed wedge-shaped area of necrosis in the dermis. Additionally, there were multiple focal mucin depositions and palisading granulomatous inflammation throughout the dermis. A diagnosis of PGA was made and she was treated with topical corticosteroid. After two weeks of applying topical corticosteroid, most of her skin lesions disappeared, leaving some hyperpigmented scars.

Multiple Skin Colored Nodules on both Legs in Patient with Positive QuantiFERON®-TB Gold Test

Nodular tuberculid (NT) was originally described by Jordaan et al. in 2000 in 4 patients from South Africa. It appeared as nodules on the legs; the pathologic changes were situated in the deep dermis and adjacent subcutaneous fat. A 34-year-old woman visited our hospital with subcutaneous skin-colored or slightly erythematous round to oval nodules. Skin biopsies revealed granulomatous inflammation at the dermo-subcutaneous junction with vasculitis. Chest X-ray, tuberculosus (TB)-polymerase chain reaction and TB culture of the skin specimen were normal. A QuantiFERON®-TB Gold test (QUIAGEN, Germany) was positive, which suggested a diagnosis of latent TB infection. The patient was treated with anti-TB medication and her condition has not recurred. Herein, we report a case of a patient with latent TB diagnosed by a positive QuantiFERON®-TB Gold test whose skin lesions had the clinical and histopathologic features of NT.

Multiple Skin Colored Nodules on both Legs in Patient with Positive QuantiFERON®-TB Gold Test

Nodular tuberculid (NT) was originally described by Jordaan et al. in 2000 in 4 patients from South Africa. It appeared as nodules on the legs; the pathologic changes were situated in the deep dermis and adjacent subcutaneous fat. A 34-year-old woman visited our hospital with subcutaneous skin-colored or slightly erythematous round to oval nodules. Skin biopsies revealed granulomatous inflammation at the dermo-subcutaneous junction with vasculitis. Chest X-ray, tuberculosus (TB)-polymerase chain reaction and TB culture of the skin specimen were normal. A QuantiFERON®-TB Gold test (QUIAGEN, Germany) was positive, which suggested a diagnosis of latent TB infection. The patient was treated with anti-TB medication and her condition has not recurred. Herein, we report a case of a patient with latent TB diagnosed by a positive QuantiFERON®-TB Gold test whose skin lesions had the clinical and histopathologic features of NT.

Tubercúlide papulonecrótica: Caso clínico / Papulonecrotic tuberculid: Case report

Una niña de 12 años fue atendida por presentar pápulas milimétricas diseminadas que involucionaron hacia escaras varioliformes. La prueba de tuberculina fue fuertemente reactiva. Se diagnosticó una tuberculosis pulmonar subyacente y la paciente respondió al tratamiento antituberculoso. La tubercúlide papulonecrótica es una erupción cutánea que se cree debida a hipersensibilidad ante un foco subyacente de tuberculosis y sería un indicador de buen estado inmunitario.

A 12-year-old girl was seen with widespread millimetric papules which resolved leaving varioliform scars. Tuberculin test was strongly reactive. Underlying pulmonary tuberculosis was diagnosed. The patient responded to antituberculous treatment. Papulonecrotic tuberculid is a skin eruption thought to be due to hypersensitivity to an underlying focus of tuberculosis and is an indicator of good immunologic status.

A Case of Atypical Cutaneous Tuberculid in an Immunocompromised Patient / 대한피부과학회지

Cutaneous tuberculids are relatively rare hypersensitivity reactions to Mycobacterium tuberculosis, characterized by erythematous eruption on the skin of a tuberculosis patient. Papulonecrotic tuberculid, lichen scrofulosorum, erythema induratum and nodular tuberculid were originally included in tuberculids. However, some cases are difficult to classify into the subtypes because of their broad spectrum of cutaneous manifestations and various histopathologies. This is particularly true in immunocompromised patients. We report a case of atypical cutaneous tuberculid in an immunocompromised patient in whom mycobacterical DNA was not demonstrated by PCR. However, the diagnosis of latent tuberculous infection was supported by IFN-gamma assay (QuantiFERON(R)-TB Gold test) and tuberculous lymphadenitis was diagnosed. The skin lesions responded dramatically to anti-tuberculous therapy, and there has been no evidence of recurrence.

Recurrent nodules in the calves: A sign of tuberculosis / Recurrent nodules in the calves: A sign of tuberculosis

Aims: To describe a case of erythema induratum of Bazin, classified as a tuberculid, or skin lesion with similar histological features to true cutaneous tuberculosis, in which the relation with Mycobacterium tuberculosis cannot be easily demonstrated.Case Description: A 60-year-old woman presented with recurrent multiple nodules in the legs. Skin examination revealed violaceous painless nodules, some of them ulcerated, with a serous fluid, located on both legs in an asymmetric way, predominantly in the calves. Lesions disappeared spontaneously for brief periods. Skin biopsies revealed septal and lobular panniculitis with epithelioid granulomata and vascular necrosis. Tuberculin skin test was positive. Culture of the cutaneous lesions and polymerase chain reaction to Mycobacterium tuberculosis were negative, but mediastinal lymph nodes collected through mediastinoscopy were cultivated and positive to Mycobacterium tuberculosis. Therapy with isoniazid, rifampicin, pyrazinamide and ethambutol were administered. After two months under therapy the skin lesions healed. The clinical and histopathological features and the strong positive tuberculin skin test have strongly suggested the diagnosis of erythema induratum of Bazin. Positive culture for Mycobacterium tuberculosis and the remission of the lesions with antituberculosis therapy confirmed the diagnosis.Conclusions: Clinicians must be aware of the differential diagnosis of recurrent skin lesions, including the erythema induratum of Bazin. In this case, association with tuberculosis was confirmed by positive culture of mediastinal lymph nodes for Mycobacterium tuberculosis and remission of the lesions with antituberculosis therapy.

Objetivos: descrever um caso de eritema induratum de Bazin, classificado como tubercúlide, lesão cutânea com características histológicas semelhantes à tuberculose cutânea, mas na qual a relação entre o Mycobacterium tuberculosis não é facilmente demonstrada.Descrição do Caso: uma mulher de 60 anos de idade apresentou-se com múltiplos nódulos recorrentes nos membros inferiores. O exame da pele revelou nódulos indolores, violáceos, alguns deles ulcerados, com um líquido seroso, localizados em ambas as pernas, de forma assimétrica e com predomínio nas panturrilhas. As lesões apresentavam um aparecimento paroxístico, com remissão espontânea por breves períodos. Foi realizada biópsia cutânea que revelou paniculite septal e lobular com granulomas epitelióides e necrose vascular. O teste tuberculínico foi positivo. A cultura das lesões cutâneas e a reação em cadeia da polimerase para Mycobacterium tuberculosis foram negativos, mas foi realizada biópsia de linfonodos por mediastinoscopia, cuja cultura foi positiva para Mycobacterium tuberculosis. Foi iniciada terapêutica específica com isoniazida, rifampicina, pirazinamida e etambutol. Após dois meses de tratamento houve remissão das lesões. As características clínicas e histopatológicas e o teste tuberculínico fortemente positivo sugeriram o diagnóstico de eritema indurado de Bazin, sendo este confirmado pela cultura de linfonodos positiva para Mycobacterium tuberculosis e pela remissão das lesões com a terapêutica antituberculose.Conclusões: o clínico precisa estar atento para o diagnóstico diferencial de lesões cutâneas recorrentes, incluindo neste o eritema induratum de Bazin. Neste caso, a associação com a tuberculose ficou confirmada pela cultura dos linfonodos mediastinais positiva para Mycobacterium tuberculosis e remissão das lesões com a terapêutica antituberculose.

Nuevo espectro de tuberculide papulosa: aspectos clínicos e histopatológicos a propósito de un caso / New spectrum of papular tuberculid: clinical and pathological aspects due to a case

Presentamos el caso de un paciente varón de 59 años de edad quien inicialmente presentó un cuadro clínico de tuberculide papulosa en rostro o tuberculide rosaceiforme, que progresivamente se extiende a cuero cabelludo, cuello, tronco y miembros superiores. Se plantea la posibilidad de que este nuevo espectro de tuberculides constituiría formas de tuberculosis cutánea paucibacilar.

We present the case of a 59-years-old male patient who was diagnosed of papular tuberculid or rosaceiform tuberculid in face, with progressive extension to the scalp, neck, trunk and arms. We propose that this new spectrum of tuberculids could be a paucibacilar form of cutaneous tuberculosis.

A Case of Tuberculous Lymphadenitis accompanying Papulonecrotic Tuberculid / 결핵및호흡기질환

Lymphadenitis is a common manifestation in tuberculous diseases. However, papulonecrotic tuberculid is an uncommon cutaneous manifestation, and is considered an allergic reaction against tuberculous bacilli in tuberculous lesions other than the lymph nodes. A wide great variety of cutaneous manifestations arise over a period of a few weeks - i.e., papules, necrosis, crusted and atrophic scars. We described a 27-year-old woman with right cervical tuberculous lymphadenitis and skin lesions involving her arms, legs and both fingers. Histopathologically, a leukocytoclastic vasculitis with V-shaped epidermal necrosis was observed in the upper and deep dermis, including the good response to anti-tuberculosis therapy support the diagnosis of papulonecrotic tuberculid.

A Case of Papular Tuberculid and BCGitis after BCG Vaccination / 대한피부과학회지

BCG (Bacillus Calmette-Guerin), which produces resistance to tuberculosis infection, is a vaccine containing live, attenuated Mycobacterium bovis. It induces specific and nonspecific dermatologic complications. The specific reactions include scrofuloderma-like, lupus vulgaris-like, lichen nitidus-like, lymphadenitis and tuberculid. We report a case of papular tuberculid, which was presented as 3-5mm sized erythematous papules on the extremities and face, and BCGitis had developed around the vaccination site after BCG vaccination. Histopathologic examination of the papule and lymph node showed granuloma, consisting of epithelioid cells and lymphocytes.

A Case of Papulonecrotic Tuberculid Combined with Erythema Induratum / 대한피부과학회지

We report a rare case in which two tuberculids, erythema induratum and papulonecrotic tuberculid, occured together. A 15-year-old Korean girl had two types of clinically distinct lesions; painful subcutaneous nodules on the legs and pruritic necrotic papules on the trunk and extremity. Mantoux test showed a strong positive reaction. Histopathologic findings of the subcutaneous nodule and necrotic papule were consistent with erythema induratum and papulonecrotic tuberculid, respectively. There was no extracutaneous focus of tuberculosis. Polymerase chain reaction for tuberculosis bacilli in both lesions revealed negative results. Antituberculous therapy brought a rapid clinical improvement of lesions within a month.

Papular Tuberculid and Suppurative Lymphadenitis After BDG Vaccination / 대한피부과학회지

Various dermatological complications have been reported following the BCG vaccination although this vaccination has been recommended to all healthy infants in our country. A 4-months-old boy, who had a BCG vaccination three weeks after birth, developed erythematous papules and pustules on the whole body, especially on the face and upper extremities. Two erythematous subcutaneous soft nodules were also noted on the left side of the neck. A biopsy specimen from the right forearm revealed caseous necrosis surrounded by a granulomatous inflammation consisting of epithelioid cells and lymphocytes. It was centered along the axis of the damaged pilosebaceous follicle. No acid-fast bacilli could be demonstrated by AFB stain. A marked improvement of his skin eruptions was observed after anti-tuberculosis medication. However, nod-ules in the cervical area perforated spontaneously and healed leaving scars several months after the cutaneous eruptions subsided. The clinical and histologic findings and a good response to anti-tuberculous therapy support the diagnosis of papular tuberculid and suppurative lymphadenitis after BCG vaccination.

A Case of Papulonecrotic Tuberculid Combined with Erythema Nodosum

We report an extremely rare case in which two tuberculids, papulonecrotic tuberculid and erythema nodosum, occurred together. A 16-year-old girl had two types of clinically distinct lesions; asymptomatic necrotic papules on the upper and lower extremities and painful subcutaneous nodules on the legs. A Mantoux test showed a strong positive reaction. Histopathologic findings of the necrotic papule and subcutaneous nodule were consistent with papulonecrotic tuberculid and erythema nodosum, respectively. There was no extracutaneous focus of tuberculosis. Polymerase chain reaction for tuberculous bacilli in the papulonecrotic tuberculid lesion revealed a negative result. Antituberculous therapy brought a rapid clinical improvement of both lesions.