Malakoplakia is a granulomatous disease associated with an infectious etiology, usually involving the urinary tract. It reveals itself as a recurrent urinary tract infection (r-UTI), and in some cases, it is associated with impairment of renal function. Immunosuppression is one of its main associated factors, and it has been increasingly described in patients with solid organ transplantation (SOT), mainly kidney transplantation. Macroscopically, it can form masses and sometimes it may be confused with neoplasia, which is why histological findings are fundamental for the diagnosis. Here, we present a case of bladder malakoplakia, manifested by r-UTI from Escherichia coli in a patient with renal transplantation, refractory to long-term antibiotic treatment and reduction in immunosuppression, which resolved after surgical management. We also summarize the clinical characteristics of malakoplakia and compare them with previous reports in the literature on SOT.

Background: Testicular pain encompasses a vast medical diagnostic field, with numerous organ and system convergence. Acute testicular pain is a medical emergency that requires accurate evaluation and immediate resolution, whereas chronic testicular pain is enigmatic and requires sound knowledge of the mechanisms of testicular pain and the differential diagnosis. Objective: To review the causes of testicular pain and propose a new etiologic classification consisting of 10 subgroups.   Methods: A bibliographic search was carried out utilizing Google and the National Library of Medicine’s PubMed databases to identify original articles and review articles (hard copy or electronic) published on testicular pain, up to March 2020. The search included: MeSH terms: testicular disease (classification, complications, etiology, trauma, microbiology, pathology, pathophysiology, secondary, surgery, treatment) and vasectomy; Non-MeSH terms:  acute and chronic orchialgia, scrotalgia, orchidynia, groin pain, epididymalgia, testalgia, chronic testicular pain, chronic scrotal pain syndrome, testicular pain syndrome, epididymal pain syndrome, and post-vasectomy pain syndrome. The initial search produced 625 articles, of which 143 were included in the present review. Results: To better understand testicular pain etiology, 100 possible diagnoses were divided into ten subgroups: infectious, neoplastic, traumatic, torsional, vascular, immunologic, neurologic, pharmacologic, obstructive, and miscellaneous causes.  Likewise, treatment can be divided into two main groups, according to therapeutic options: pharmacologic and non-pharmacologic, with the latter subdivided into: noninvasive and the increasingly performed invasive (surgical) alternatives. Conclusions: Testicular pain should be understood as a complex pain syndrome of enigmatic origin. Treatment success depends on the correct identification, from hundreds of possibilities, of the cause of pain. Logical grouping of those possibilities could aid in making the accurate etiologic identification.

Background: Testicular pain encompasses a vast medical diagnostic field, with numerous organ and system convergence. Acute testicular pain is a medical emergency that requires accurate evaluation and immediate resolution, whereas chronic testicular pain is enigmatic and requires sound knowledge of the mechanisms of testicular pain and the differential diagnosis. Objective: To review the causes of testicular pain and propose a new etiologic classification consisting of 10 subgroups.   Methods: A bibliographic search was carried out utilizing Google and the National Library of Medicine’s PubMed databases to identify original articles and review articles (hard copy or electronic) published on testicular pain, up to March 2020. The search included: MeSH terms: testicular disease (classification, complications, etiology, trauma, microbiology, pathology, pathophysiology, secondary, surgery, treatment) and vasectomy; Non-MeSH terms:  acute and chronic orchialgia, scrotalgia, orchidynia, groin pain, epididymalgia, testalgia, chronic testicular pain, chronic scrotal pain syndrome, testicular pain syndrome, epididymal pain syndrome, and post-vasectomy pain syndrome. The initial search produced 625 articles, of which 143 were included in the present review. Results: To better understand testicular pain etiology, 100 possible diagnoses were divided into ten subgroups: infectious, neoplastic, traumatic, torsional, vascular, immunologic, neurologic, pharmacologic, obstructive, and miscellaneous causes.  Likewise, treatment can be divided into two main groups, according to therapeutic options: pharmacologic and non-pharmacologic, with the latter subdivided into: noninvasive and the increasingly performed invasive (surgical) alternatives. Conclusions: Testicular pain should be understood as a complex pain syndrome of enigmatic origin. Treatment success depends on the correct identification, from hundreds of possibilities, of the cause of pain. Logical grouping of those possibilities could aid in making the accurate etiologic identification.