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Review
. 2021 Apr 29:12:584703.
doi: 10.3389/fimmu.2021.584703. eCollection 2021.

Remission of Thymoma on Steroid Therapy in a Patient With Atypical Thymoma-Associated Multiorgan Autoimmunity: A Case Report and Literature Review

Ewa Wrona  1 , Sylwia Dębska-Szmich  1 , Marta Pastuszka  2 , Marcin Braun  3 , Rafał Czyżykowski  1 , Piotr Potemski  1
Affiliations
Review

Remission of Thymoma on Steroid Therapy in a Patient With Atypical Thymoma-Associated Multiorgan Autoimmunity: A Case Report and Literature Review

Ewa Wrona et al. Front Immunol. .

Abstract

In up to 34% of cases, thymoma, itself a rare neoplasm, is accompanied by autoimmune disorders, two of which are thymoma-associated multiorgan autoimmunity (TAMA) and paraneoplastic autoimmune multiorgan syndrome (PAMS). Unfortunately, differential diagnosis between these two entities can be challenging since no strict PAMS definition exists and PAMS can overlap with a subgroup of TAMA patients with skin lesions as leading presentation. We present a case of a 68-year-old woman with a diagnosis of thymoma accompanied by myasthenia gravis, hypothyroidism and GvHD-like mucocutaneous lesions that initially could account to both TAMA and PAMS diagnosis. However, following the exclusion of humoral autoimmunity against components of epithelial cells junction, TAMA was finally established. Interestingly, the introduction of corticosteroid therapy for TAMA symptom management resulted in unexpected partial remission of thymoma with no impact on mucocutaneous lesions. Our case study is an example of two extremely rare phenomena accompanying thymomas: unprecedented TAMA presentation with GvHD-like mucositis, which as we postulate should be placed in the spectrum of TAMA, and tumor remission on steroids.

Keywords: mucocutaneous lesions; paraneoplastic autoimmune multiorgan syndrome (PAMS); remission on steroids; thymoma; thymoma-associated multiorgan autoimmunity (TAMA).

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
TAMA. Skin and mucosal lesions photographed (A) at the onset of chemotherapy, (B) after six cycles of systemic treatment and (C) after three months of prednisone therapy.
Figure 2
Figure 2
Thymoma. Computer tomography imaging showing maximal tumor dimensions (upper row) and infiltration on VCS (bottom row): (A) prior systemic treatment (64 x 30 x 76 mm); (B) after completion of chemotherapy (51 x 26 x 70 mm); (C) prior corticosteroids implementation (65x63x75mm); (D) after three months of corticosteroid therapy (30x17mm).
Figure 3
Figure 3
TAMA. HE and immunostaining of the skin (A) and oral mucosa (B) samples in magnification.
See this image and copyright information in PMC

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