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Background: Giant bullous emphysema is characterized by large bullae occupying at least one-third of the hemithorax and leading to compression of the surrounding lung parenchyma. Overdiagnosis can occur because of the atypical appearance of hyperplastic type II pneumocytes, which may be mistaken for malignant cells., Case Presentation: A 48-year-old male with a history of smoking and occupational exposure presented with dyspnea and drowsiness. Initial chest X-ray revealed a tension pneumothorax, and subsequent chest CT revealed extensive bullous emphysema and lung cancer in the right middle lobe (RML). Pathologic examination initially indicated resected bullae to metastatic adenocarcinoma, but upon review, it was determined that the reactive alveolar cells were misdiagnosed as malignant., Conclusions: This case emphasizes the need for thorough histopathological assessment and prudent interpretation of atypical cellular morphology., (© 2024. The Author(s).)

Purpose: The success of XEN Gel Stent (XEN) and Preserflo MicroShunt (Preserflo) implantation depends mainly on the development of bleb fibrosis. This study aimed to describe the histological findings of bleb fibrosis after XEN and Preserflo surgery., Methods: This retrospective study included patients with different types of glaucoma who underwent revision surgery after XEN or Preserflo implantation. The available clinical information and histological samples of removed fibrotic tissue were analyzed., Results: Thirty-six patients were included. Revision surgery was performed at a median of 195 (range = 31-1264) days after primary surgery. The mean intraocular pressure changed from 29.1 (± 10.3) mmHg at baseline to 18.3 (± 8.7) mmHg (- 37%; p < 0.0001) and 16.2 (± 4.2) mmHg (- 45%; p < 0.0001) after 6 and 12 months, respectively. Histological analysis revealed an increase in activated fibroblasts and macrophages in all specimens and a parallel orientation of fibroblasts in a minor part of the probe in 60% of the specimens. No pronounced inflammatory reaction in the form of lymphocytic or granulocytic infiltration was observed. The comparison of specimens from uveitic glaucoma and primary open-angle glaucoma patients revealed no significant differences., Conclusions: The histological analysis of fibrotic blebs from the XEN and Preserflo implants did not show any pronounced immune or foreign-body reaction and revealed a similar histological pattern of failed blebs after trabeculectomy., (© 2024. The Author(s).)

Abstract: Multiple pathophysiologic and biomolecular processes lead to bullae, including disruption of adhesion molecules, accumulation of cell injury, and traumatic injury. Blistering disorders of the foot can cause symptoms such as pruritus, pain, and drainage and significantly impact quality of life. Microbiologic and histopathologic examination of tissue specimens should be considered for concerns regarding atypical etiology.This retrospective case series describes patients seen in a community hospital outpatient wound center in southeastern Wisconsin between January 2021 and June 2023 for atypical blistering disorders of the foot. The cases herein describe the history, clinical presentation, and treatment of three atypical blistering disorders of the foot. An 86-year-old man presented complaining of intensely pruritic blistering lesions to both feet. Histopathologic findings indicated eosinophilic infiltrate, and the patient was treated for an eosinophilic drug reaction. A 65-year-old man presented complaining of multiple painful blisters to the plantar aspect of both feet. Histopathologic examination of unroofed blister indicated bullous tinea. Finally, a 44-year-old man with long-standing type 1 diabetes presented complaining of a several-week history of a single blister to his anterior right foot of unknown etiology. The patient was diagnosed with bullosis diabeticorum.Blistering disorders of the foot are diagnostic challenges; diagnostic clarity is assisted by thorough history, clinical presentation, treatment response, microbial analysis, and histopathologic findings., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)

Competing Interests: Competing interests:: None declared.

Competing Interests: Declaration of interests We declare no competing interests.

Lupus erythematosus (LE)-specific bullous lesions are often difficult to distinguish from other bullous diseases presenting in patients with systemic lupus erythematosus. Herein, we describe a 49-year-old woman with systemic lupus erythematosus with recurrent tense bullae on the forearms. Clinical, histopathologic, and serologic findings led to the diagnosis of LE-specific bullous lesions. We also summarize the diagnostic clues for distinguishing LE-specific bullous lesions, bullous systemic lupus erythematosus, and erythema multiforme-like lesions in LE (Rowell syndrome).

Autoimmune blistering diseases (AIBD) comprise a heterogeneous group of uncommon disorders of the skin and mucous membranes, characterised by antibodies targeting structural proteins within epithelial tissue and the underlying basement membrane. There can be significant overlap in clinical presentation of these diseases and accurate diagnosis relies on the detection and characterisation of relevant autoantibodies. Immunofluorescence provides the gold-standard diagnostic tool for these diseases, identifying both tissue-bound autoantibodies in biopsy material using direct immunofluorescence and circulating antibodies in serum through indirect immunofluorescence. Following advances in the identification and subsequent characterisation of numerous antigenic targets in these diseases, the development of antigen-specific tests, in particular, enzyme-linked immunosorbent assays on serum specimens, has provided a third key tool to not only identify, but also quantify AIBD autoantibodies. This quantification has proven particularly useful in monitoring disease activity and informing clinical management decisions. Accurate diagnosis of these diseases is important since optimal treatment strategies differ between them and, prognostically, some diagnoses are associated with an increased risk of malignancy. This review outlines the molecular pathology underlying the major AIBD and describes how the three principal techniques can be used in combination, to provide best practice for diagnosis and treatment monitoring., Competing Interests: The author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Mee.)

Background/ Purpose: Multiple serous pigment epithelium detachments (PEDs) have been infrequently reported. We report a case of a young female with bilateral innumerable serosanguinous PEDs, giving an appearance of multiple blisters., Methods: A 26-year-old female presented with sudden onset diminution of vision in left eye. She had bilateral innumerable translucent blister-like elevations of retinal pigment epithelium (RPE) and a few hemorrhagic blister-like elevations at macula and submacular blood in left eye. Multi-modal fundus imaging was performed. Pneumatic displacement and intravitreal injection of ranibizumab was performed in left eye., Results: optical coherence tomography (OCT) confirmed multiple serous PEDs with pachychoroid morphology in both eyes and few hemorrhagic PEDs at the macula in left eye. The lesions were hypoautofluorescent with a halo of hyperautofluorescence. Fluorescein angiography revealed pooling into the serous PEDs in both eyes and few late leakage points in the area of blocked fluorescence at the macula in left eye. One-month following the intervention, subretinal blood had partially displaced with modest visual acuity gain. However, the patient refused further intravitreal injections., Conclusion: Bilateral extensive serous PEDs, to the extent noted in this case, have not been previously reported. A widespread RPE-Bruch's membrane defect is suspected.

Competing Interests: Declaration of Competing Interest None.

Background: Recurrent blisters in the face can be a sign of linear IgA disease, a rare blistering disease with cutaneous as well as mucosal involvement., Case Description: A 75-year-old male patient visited our Dermatology outpatient department with complaints of recurring blisters in his face. Erosions and crusts, but no blisters, were seen during physical examination. Histopathologic examination showed subepithelial vesicles. Eventually, direct immunofluorescence showed IgA deposition at the basement membrane zone which confirmed the diagnosis of linear IgA disease. The patient was successfully treated with dapsone. Due to possible mucosal involvement, the patient was also referred to the ENT-specialist and the ophthalmologist who could not find any abnormalities., Conclusion: With a story of recurrent blisters in the face, one should be aware of the blister disease called linear IgA disease. Clinical presentation may be subtle. Physicians should rule out mucosal involvement as this can lead to great morbidity.

This case concerns a newborn with many small transparent vesicles on the forehead, trunk and face. Miliaria crystallina was diagnosed based on the typical presentation. Miliaria crystalline is a transient obstruction of sweat glands resulting in non-inflammatory vesicles. The treatment is simple: cool down.