Abdessater · Basic and clinical andrology 2020 · systematic literature review · n=7 studies

Hard flaccid syndrome: state of current knowledge.

Cited 11 times in the scientific literature.

Level 5 - mechanism / opinion, no new human data

Review synthesizing descriptive literature and mechanism-based pathophysiological reasoning without randomized controlled trials.

PubMed 32518654 · doi:10.1186/s12610-020-00105-5 · record verified 2026-08-27

What was done

A literature review following PRISMA guidelines was conducted across MEDLINE, CENTRAL, PASCAL, and Google Scholar using the search terms "hard", "flaccid", and "syndrome" for articles published between 2018 and February 2019. From 16 initial records, 7 eligible full-text publications were analyzed to characterize clinical presentation, diagnostic approach, pathophysiology, and treatment strategies.

What was found

The review synthesized findings from 7 eligible references. Hard-flaccid syndrome is reported as an acquired, chronic condition primarily affecting men in their 20s and 30s, typically triggered by trauma to the base of an erect penis. Reported features include persistent penile semi-rigidity in the flaccid state, impaired erectile rigidity, penile sensory changes, pelvic floor muscle contraction, urinary symptoms, psychological distress, and symptom exacerbation when standing. Diagnostic imaging and laboratory tests are characteristically normal. Multimodal therapy combining behavioral modifications, psychological interventions, and pharmacological management for pain and erectile dysfunction is described. The abstract reports no quantitative outcome measurements or statistical comparisons.

Why it matters

This review compiles the limited formal clinical literature on hard-flaccid syndrome, providing clinicians with diagnostic and descriptive reference points for a condition predominantly discussed on online forums.

Limits

The review included only 7 articles from a very narrow publication window (2018 to early 2019). The abstract does not report total patient sample size, quantitative efficacy data, or comparative trials.

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