|Year : 2019 | Volume
| Issue : 3 | Page : 445-446
Occam's razor versus Hickam's dictum: An unusual cause of acute renal failure in pediatric solid malignancy
Deepam Pushpam, Abhishek Raj, Atul Batra, Sameer Bakhshi
Department of Medical Oncology, Dr. B.R.A. Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
|Date of Submission||06-Mar-2018|
|Date of Decision||19-May-2018|
|Date of Acceptance||12-Jul-2018|
|Date of Web Publication||04-Dec-2019|
Department of Medical Oncology, Dr. B.R.A. Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi - 110 029
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Pushpam D, Raj A, Batra A, Bakhshi S. Occam's razor versus Hickam's dictum: An unusual cause of acute renal failure in pediatric solid malignancy. Indian J Med Paediatr Oncol 2019;40:445-6
|How to cite this URL:|
Pushpam D, Raj A, Batra A, Bakhshi S. Occam's razor versus Hickam's dictum: An unusual cause of acute renal failure in pediatric solid malignancy. Indian J Med Paediatr Oncol [serial online] 2019 [cited 2020 Jul 4];40:445-6. Available from: http://www.ijmpo.org/text.asp?2019/40/3/445/272264
Acute renal failure in pediatric malignancies is a common phenomenon. The common attributable causes are tumor lysis syndrome (TLS), postrenal obstruction, and drug-induced nephropathy, among others. It has therapeutic implications, and timely diagnosis and intervention is paramount to both short- and long-term outcomes of the patient. The case discussed below is a rare cause of acute renal failure in a patient of rhabdomyosarcoma (RMS).
An 18-year-old boy presented with pain and swelling in the right scrotum for 4 months. He underwent scrotal orchiectomy, and histopathology revealed alveolar RMS. Staging workup revealed retroperitoneal lymphadenopathy, multiple vertebral, bone marrow, and pelvic metastases. Two weeks later, the patient presented in emergency with high-grade fever, myalgias, headache, and conjunctival congestion. Clinical examination revealed tachypnea, tachycardia, and conjunctival congestion. The blood investigations revealed leukocytosis, thrombocytopenia, acute kidney injury, hyperkalemia, hyperuricemia, hypercalcemia, and metabolic acidosis [Table 1].
With the suspicion of sepsis and renal failure, the patient was started on broad-spectrum antibiotics and hemodialysis. Renal failure and electrolytes improved after a single session of hemodialysis; however, fever and hypercalcemia persisted.
The patient was evaluated for dengue, malaria, and chikungunya, which were negative. The serology for scrub typhus was positive by using immunochromatographic test, which was positive after a week as well. The patient was started on oral doxycycline at a dose of 100 mg twice daily, and he was afebrile after 48 h. Subsequently, his renal functions improved and he was started on multiagent vincristine, actinomycin-D, and cyclophosphamide regimens.
Acute renal failure in the background of pediatric malignancies can be due to TLS, postrenal obstruction, and drugs. TLS is rarely seen in pediatric solid tumors. Case reports have been published for neuroblastoma, medulloblastoma, and hepatoblastoma. In RMS, there are four cases with TLS published in literature [Table 2].,,
Three of four reported cases of RMS with TLS had bone marrow involvement. Our patient also had bone marrow involvement, and the possibility of TLS causing renal failure was kept. However, spontaneous TLS is extremely rare in RMS with only one case reported in literature.
Fever may be a presenting feature in patients with RMS with bone marrow metastasis., Applying Occam's razor, the primary diagnosis of RMS with bone and bone marrow metastasis could explain the findings of hypercalcemia, thrombocytopenia, fever, TLS, and acute renal failure.
On the contrary, as per Hickam's principle, alternative diagnosis can coexist. Fever, thrombocytopenia, and acute renal failure are the features of endemic diseases in India, such as malaria, leptospirosis, dengue, enteric fever, and scrub typhus. Our patient tested positive for scrub typhus.
Scrub typhus is a zoonotic disease caused by Orientia tsutsugamushi and transmitted by trombiculid mites. Clinical features are fever with chills, headache, myalgia, sweating, vomiting, lymphadenopathy, eschar, and maculopapular rash., Acute renal failure has been reported from 18% to 32% in two large series., Mortality has ranged from 9% to 24% depending on complications.,
Our case is unique because to the best of our knowledge in the backdrop of metastatic RMS scrub typhus has not been reported previously. The clinical presentation of scrub typhus closely mimicked rare presentation of RMS with bone metastasis and TLS. It emphasizes the need to evaluate for benign causes of renal failure in patients with malignancy. A detailed history, physical examination, and directed investigations can clinch a curable but potentially fatal diagnosis in time. The clinicians need to keep an open eye for the possibility of a scrub typhus infection in endemic areas even among patients of some other primary diagnosis.
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Conflicts of interest
There are no conflicts of interest.
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[Table 1], [Table 2]